Duramax pulley noise Noticed a weird whistling noise the other day while pulling out of a parking lot. Feb 8, 2013 路 Rodger 07 classic crew cab long bed 2wd 2500 700,000 miles BITCHES!!!!! Rotella T oil. Characteristic noise being amplified by the transmission bell housing. Any noise in them could be a sign that the bearing is going bad. Dealer said they didnt know where it was coming from and would need 3 to 4 hours to diagnose it. Total bill was $290CAD and again covered under warranty and billed to GM. They get glazed and chirp. 5 GMC, LLY, CCSB, SLT, 4WD, 4inch Exhaust, Diamond Eye Down Pipe, DSP5 from Idaho Rob, Edge CTS, Killerbee mouthpiece, PCV Reroute kit, EGR Blocked, 172K Mar 28, 2020 路 馃嚚馃嚤 馃殕2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite AirEFI'd by Rob 馃嚭馃嚥馃殯 2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air Usually it's the pulleys when it makes this noise. 5-05 LLY Duramax Powertrain Strange Pulley-type Noise Strange Pulley-type Noise. Bone stock and staying that way until I have reason to change it. Save Share Could be a pulley or Mar 9, 2012 路 I began to think that the low end crap steering and the hiss were the result of a weak power steering pump. Feb 3, 2011 路 Skylar, my sales person, again convinced me this noise was normal and it was a new engine and give it some time. (both bearings will probably come out with the shaft. To check the a/c compressor just turn it on and see if the noise gets better or worse. TC-Matt Discussion starter Dec 20, 2011 路 4. May 13, 2011 路 01-04. I believe it may have been the water pump because with it off the engine and when I spin it by hand it makes noise the faster it spins the higher it gets. Under light acceleration up to about 3psi boost. Was told to remove belt and see if it goes away. Aug 2, 2014 路 Based on your post the noise goes away after the belt gets a little heat in it, sounds like either a dry belt or moisture on the pulleys. I approached other owners of GMC trucks with 6. The Mechanic Called The Service Tech Rep And He Said The Duramax Has So Much Compression That When You Shut Off The Engine It Stops Faster Than The Accessories And The Belt Gets A Wear Spot From The Alternator. This only occurs when the truck has been sitting for a while and is not at operating temp. I had a 03 GMC Duramax and it never made the same noise. 5-05 LLY Forum. I would replace it anyway at 126k. e. Sep 20, 2015 路 Rotational noise at idle - possibly idler or tensioner pulley. 2016 GMC Sierra Denali Duramax Z71. Former Trucks:2019 GMC Sierra Denali Duramax 2500, loaded. the ruler wont land perfectly on the a/c pulley if your going off the outer face of the fueler pulley but you just want the line the ruler creates to be parallel to the edge of the a/c pulley edge face. So yea, it may be feasible to do them when you do the belt for a scheduled service. Thanks. i ended up going to this old (and by old i mean like 1920's old) parts store that carried Aug 23, 2011 路 Replacing idler pulley and belt on 2005 Chevy 2500hd 6. I am willing to bet it still makes the same noise. The belt is an indicator of which direction to move the pulley by the side of the ribs showing feathering Mar 15, 2020 路 Pulleys look good too, and the grooves are clean. Thought was exhaust leak but just went through all of that couple weekends ago. Nov 18, 2009 路 2021 3500 CCLB Denali 4x4 Sold-2018 2500 CCSB DENALI 4x4 Sold-2015 3500 CCLB DENALI Dually 4x4 Sold-2008 3500 CCLB LTZ Dually 4X4 Sold-2007. May 12, 2013 路 Chevy / GMC Duramax 04. ) 5. You should hear plenty of turbo noise until you let off the accelerator. I replaced this pump (around 200) to no avail. I decided to pull an idler pulley and check it out. 2500HD 3500 Silverado Sierra 6. PS - Kinda sounds like the noise in this video. Anyone else have this same Jan 10, 2018 路 This video shows what a bad idler pulley sounds like and gives step-by-step instructions on how to replace it in a duramax Chevrolet or GMC truck. Nov 28, 2019 路 While your belt is off, check every pulley for the squeak. Has anyone actually had this issue and gotten it fixed? Dec 1, 2011 路 Chevy / GMC Duramax 04. I thought it might be the water pump, idler pully, or tensioner so I took the serpentine belt off to see if the noise would go away and confirm my suspicion. Just Bought the truck and have previously owned a couple doge cummins. You just won't have power assist for steering, and/or limited boost help on brakes. Jump to Latest Pulley probs elsewhere, causing belt noise Mar 22, 2022 路 I have a 2020 with the 3. Jan 20, 2018 路 They arrived Thursday, so I was able to change out the idler pulleys and the tensioner pulley. Remove the first idler pulley 6. It's gotten worse and worse and now it's loudest at idle. 6 Duramax Feb 27, 2010 路 On my 2004 LLY duramax, when I first start the truck I get a squealing noise comimg from the belt for 2-3 seconds and then its done. Gonna get the belt back on and do a flush and see if it changes/eliminates the sound. 04. Aug 11, 2012 路 Never spray anything on a serpentine belt ever. It only make the noise if I get on it kinda hard, and during normal accel. 10. Chances are it's the tensioner. Aug 26, 2014 路 It sounds like a bearing on a pulley going bad. Have replaced entire fuel system, sending unit to injectors, lines included, Waterpump, hydro boost, besides that truck is factory original except ujoints and brake pads 3. Lower pitched than turbo whistle. Nov 2, 2010 路 Chevy / GMC Duramax 11-16 LML Forums. So the stupid questionis it possible to describe how to remove the serpentine belt to check the pulley's for noise or rough bearings? Is there a pry point to loosen Oct 6, 2023 路 Sound like bad pulley bearings. I Hope This Jan 22, 2015 路 surprise duramax 2005 gmc lly,6 inch lift,fox shocks with remote resevoirs,moog pitman arm & idler arm,fabtech tie rods,rear airbags,18 inch boyd coddington rims,12. Water pump is gear driven, so no harm done with drive belt off. Jun 19, 2022 路 Started the truck without the serpentine belt and the noise is not there. Feb 13, 2010 路 Could be the brackets but I would check the Power Steering pump pulley for alignment B4 investing in brackets. Haven't had a chance to do that though Feb 27, 2013 路 Current Truck: 2024 GMC Sierra Denali 2500 HD with retrax-pro tonneau cover. Oct 15, 2011 路 One last thing regarding the pulleys. Oct 19, 2010 路 Pulleys were fine, too. Feb 13, 2010 路 It makes the noise if it's on or off. I'm gonna order a Gatorback this weekend Aug 17, 2009 路 just put my truck back together with the help of a friend whos a mechanic we did the water pump and shim kit along with the lbz mouthpiece at the same time i changed the exhaust to a 4" and just finished and airdogg set up last night but ever since the water pump change i have a rattle/nocking noise if u will that was not there before we started dint know it its the aftermarket water pump or Feb 20, 2018 路 馃嚚馃嚤 馃殕2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite AirEFI'd by Rob 馃嚭馃嚥馃殯 2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air May 30, 2021 路 Pull the belts off the truck and run the motor for just a minute or two to see if the noise goes away. But the noise remains. With the belts off and the motor off, you can spin each pulley by hand to see if you hear or feel any grinding, squealing, or other odd noises. Oct 10, 2012 路 Justin 2001 LB7 Silverado 2500HD LT CCSB 4x4. Dec 14, 2022 路 I had my idler pulley go out at 110K kms(70K miles) Towed it to the dealer (GM roadside assistance, no cost to me), and they had it replaced under warranty. 01-04. Feb 15, 2011 路 07 Silverado Duramax 03 Sierra LQ4 Denali 01 Silverado Duramax 09 Silverado SCRB 2500HD LY6 98 Suburban 2004 CCSB Duramax. Here was a video of my engine my noise. A failed idler pulley will usually cause the belt to come off, leaving you stranded. 5-05 LLY Duramax Powertrain ac compressor clutch squeaking. 5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004. (I used a big 3 jaw. I thought the noise was a bad pulley or the tensioner pulley, so I removed belt checked all pulleys they appeared to be fine so I started it up for a few seconds with out belt and noise was still there when running the noise would be quiet than super loud than quiet at idle. from a take off. Fire her up and check the belt travel. Anything else you can think of please post it up. Now, the whining noise is gone. Due to where I was and thinking it was just a pulley, I drove with it for a few hundred miles before I had the chance to bring it in. 0 duramax. Jun 23, 2009 路 1/2" drive breaker bar in the tensioner and pry towards the air filter box. Repetitive squeaking indicates the belt is not running true, and prolonged squealing means that the belt is overheating. Apr 12, 2012 路 FYI, I have been trying to track down a tapping noise for a week now. It isnt THAT bad of an idea as those smaller pulleys do spin sometimes 3-4x faster than the crank pulley (smaller diameter). EFI Live by Idaho Rob, 695K+ and rolling, Undercover Bed Cover, Vortex spray in bed liner, Odyssey Extreme Batteries, Westin steps, Bilstein Shocks, Road Master Active Suspension, M/A Pump Rub Kit, PPE Trans Cooler, PPE 3" downpipe, MBRP 5" Exhaust, Edge Insight CTS, K&N drop in filter, AirDog II 100 w/ CAT 751, LLY FF Housing, Running on LMM Nov 28, 2024 路 Does it drive the water pump too? Or is the water pump operation completely separate from this belt? There are only 3 components related to the belt: the crank, the fan pulley, and the tensioner pulley. Im having an issue with my belt making a ton of vibration noise (kinda shutters and shakes when makes this noise) and the idler is making a lot of "jingling" kinda noise. The pump replacement wasn’t difficult but the pulley removal and reinstall required a trip to Napa to borrow their tools. The only other thing to check is the pulleys and the tensioner it's self. Mar 14, 2015 路 Ok guys my 2006 lbz duramax makes kinda like a high pitch squeal when it's not warmed up and the rpms are around 2000 when it is warmed up it doesn't make the sound. 6L Duramax(R) Diesel Engine Accessory Drive Belt Chirp, Squeal, or Squeak Type Noise at Cold Start Idle (Replace Accessory Drive Belt) Models: Nov 24, 2011 路 04. The LLY fan is overdriven. 2016 Chevy 2500 CCSB LTZ Custom Sport Z71 - SuspensionMAXX Leveling Kit, Cognito UCA's, 285/60r20 Exo Grapplers on OEM High Country Chromes Dec 5, 2008 路 The noise is not audible at idle or deceleration, only upon acceleration or when cursing down the highway. This noise is typically caused by a mechanical problem, either a worn auto-tensioner or idler pulley. The tensioner has a smaller pulley so I would think the frequency of the noise would be higher than it is if it was the culprit, and the thump does seem to occur once per engine revolution. put the end so ruler crosses the dual fueler pulley wheel at two points and see where it lands against the a/c compressor as well as the power steering. Banks power big hoss kit with power pda,Slightly modified Owned for 12 years The clutched pulley prevents the shutdown noise Apr 11, 2011 路 The noise usually is most noticeable at the rear of the drivers side front wheel well. Sep 11, 2007 路 If the power steering pump is misaligned, it will force the accessory drive belt to run farther inboard on the fan pulley. 07. So at first I thought DHD had sent me the wrong pulley, so I decided to order one from my local GM dealer ship Part # 12625313 thinking it would look like the original LMM style. The idler pulleys didn't seem real bad to the point of making noise. The one pulley compeletly blew apart. use a press or 3 jaw to remove the bearing from the shaft. Jul 16, 2010 路 Four stroke diesel S. 3. This shou Jan 13, 2019 路 No noise coming from the belt area or any pulleys. Crack a beer and relax, you're done. Jun 8, 2019 路 I have 78,xxx original miles I've put on the truck owned it since new and meticulously taken care of it performed all the work and mods myself. Never repeats when warm. 039 in) to the front from the flush Apr 25, 2014 路 2011 Silverado 3500HD SRW LML CCSB LTZ. my guess would be that your power steering pulley wondered a little off the shaft. The Solution Is A New Belt And An Alternator With A Clutched Pulley. Also parked with trans in park. Aug 21, 2020 路 I have confirmed that the noise is present with the accessory belt disconnected, radiator fan disabled. LBZ. Noise kept grumbling. The problem is that it only happens 99% of the time while the truck is moving ( I just about jumped out of my truck at a stop light the other day because it was actually doing it while stopped and it continued when I put it in park! Nov 16, 2022 路 Replace the tensioner and idler pulleys. . Changed the pulley, and low and behold no more tapping. Any idea? Jan 25, 2007 路 Now on the 2001 DMAX, the belt tensioner was a pretty weak design. If you are replacing the idler pulley, loosen and remove the bolt in the center of the pulley, the pulley will come off with the bolt. 02 and newer Duramax engines use 2 of these. ) 2. May 31, 2010 路 Google "fan drive ratio" and duramax, together. Seems to have gotten louder since my last oil change. These guys here are real knowledgeable and helpful. Jump to Latest 2. 6L 403 CID L5P #PIP5711A Duramax warm engine idle knock noise. Popped hood couldn’t tell nothing. No codes and truck runs fine. For about 3 weeks it has had an intermittent chatter noise coming from the lower, passenger side of the engine bay. 2020-2021 6. for rub marks and found nothing. Jump to Latest Follow May 4, 2008 路 I have a 06 GMC Duramax and at idle, there is a constant loose sounding ticking noise. Also tried revving the truck a few times right after starting to make sure it wasn't an exhaust leak that seals once hot, no squeal and pew noise at all! Feb 8, 2012 路 The noise usually is most noticeable at the rear of the drivers side front wheel well. The noise stuck around, sometimes better, sometimes worse. It is most pronounced when the engine is warm and in gear at idle. Pop off your accessory belt and then start your truck. The most frequent and common engine noise comes from drive belts. Line-X over the Rail, Rockers and Side Steps, S&B Intake w/Donaldson Powercore G2 Filter & Scoop, Kennedy Twins/W Filter, Edge Insight CTS, Crown Performance SS Brake Lines, PPE Rear Diff Cover, Bushwacker Fender Flares, Cognito Leveling Kit with UCA's & Steering Braces, Rare Parts Tie Rods, Bilstein 5100's, KC Light Bar, Rigid Dually D2's, LT295/70R/18 Nov 23, 2015 路 a 1 foot metal ruler works well. Dec 3, 2023 路 The second pic is of the new pulley from DHD. B. The key here is that the OP stated he's been hearing squealing belt noise, which tells me loose belt. 5 (LBZ & LLY) Top Contributors this Month Jun 9, 2011 路 Also, if it is a squeal/squeak more than a whine, the belt itself could be bad as the back of the belt slips over a cold pulley. I'm very mechanically inclined, mainly race car fabrication and maintenance, however I have little to no time working on the tow vehicle. Jun 1, 2018 路 Got the belt off this weekend and fired the truck up: no more noise. It seems to be loudest when the engine is hot 90+. - YouTube Jun 18, 2012 路 I have a noise like that too. Alternators can also make noises Mar 19, 2023 路 Discovered a variable engine whirring noise. Turned all the pulleys by hand and the PS pulley showed some signs of resistance. Just figuring out witch pulley is the hard part. Still had a hiss and no-steer and deadspot. Replace any worn pulley. The outer ring of the harmonic balance may slide back on the crankshaft and cause a misalignment of the accessory belt. At that mileage and age it should't be a bearing, any fluid leaks would be in the running for the cause of noise too. This morning after our haul to a horse show I heard a shrill squeal from under the hood at idle. belt noise? Jump to Latest 2K views Jan 8, 2024 路 This is my 4th Duramax so I am familiar with all the ticking noise complaints but this is not a tick. Remove the other idler pulley 7. I swapped the tensioner about a year ago same noise then both idler pulleys noise went away about two months ago noise was faintly there but finally showed its ugly face today finally found my belt noise. 5" Exhaust no noise stopper, EFI'd, LBZ piehole. Are these crappy parts or could the AC pulley, fan pulley or the harmonic balancer pulley be bad? The belt just vibrates terrible. Or like my Polaris Ranger when the gear selector is half way between gears. At 122k miles, that made sense, and I replaced them - found one bad pulley. Nov 22, 2020 路 Thumping or knocking noise coming from what sounds like the rear of the engine. If deposits start to form in the injectors, the atomization of the fuel will be degraded and can contribute to increased noise. Sep 1, 2016 路 I always use an automotive stethoscope, which are usually less than $20, and put it on the bolt of each pulley to verify if the noise is coming from the pulley and which one(s). The newer vehicles don't have many belt problems unless there is debris in the belt grooves or the pulley grooves. I just want to make sure I get something that will last and not make a bunch of noise. I have replaced the belt tensioner pulley, the 2- idler pulleys (which were making noise), and the belt. It could be the water pump, but I can't tell. Ended up with a new engine warrantied from GM. You could try a different brand of belt. Chevy / GMC Duramax 04. 4. SOLD - 2006 2500HD LBZ CCSB 4x4 178k miles, EFILive by ATP, 265/75/16 BFGs, Nicktane adapter w/2 micron CAT filter, Bilstein 5100's, Diamond Eye cat delete, MBRP downpipe, MBRP 4" exhaust with muffler, LML exhaust manifold and heat shield, EDGE Insight CTS, RedHead Steering gearbox, Demco Autoslide 18k Feb 5, 2011 路 Chevrolet '16 2500HD 4WD LTZ CC D/A LML Deep Ocean Blue, HID lighting, otherwise stock. I have a big thread in duramax forum It was a cam shaft bearing that failed due to a defect. water pump, both smooth idler pulleys, serpentine belt, and I STILL have this noise that sounds like a bearing squeal. It ONLY happens on first start of the day when engine is cold. I only hear the noise around 1000 rpms. All 6600 Duramax(TM) diesel engines have this condition; however some are more audible than others. Put into reverse, then forward, then back to park. Customers may also comment about hearing a tick noise inside the vehicle at idle such as when sitting at a drive through window. Jul 11, 2006 路 This Time They Checked Alignment And It Was Spot On. Revved engine to eliminate the turbo possibility and could not duplicate the noise. If you have a similar sound and want to check your pulleys, read on. Any ideas ? Jun 1, 2016 路 After purchasing my Duramax about a year ago I noticed a faint squeal that would only happen when the truck was ice cold. I did this on a powerstroke recently. The second most likely suspect is a bad starter. Checked all rotational components from drivetrain to engine along with wheels and brakes. Jump to Latest this noise. When the belt leaves the fan pulley, the belt will not align properly to the crankshaft pulley grooves and create a chirp or squeak type noise at the point of interference. Vehicles built after June 2004 will already have the new A/C compressor/power steering pump mounting bracket installed, but still may exhibit belt noise caused by the power Jul 6, 2015 路 Step 1 – Engine noise: drive belts. The noise is from the DEF Injector and is considered a normal operating condition. That is what you have been hearing, an inefficient fan/pulley combination. Jump to Latest Pulley probs elsewhere, causing belt noise Aug 26, 2022 路 It is NOT, a turbo heat shield, power steering pump noise, normal turbo whistle, pulley noise or fan hitting a shroud. Truck had 660 miles when I Left it with dealer and they said it was "EGR valve operation noise, normal coming from EGR system". When they start to make occasional noise like that, its past time to replace them. Here's the actual alldata info: Diesel Engine - Chirp/Squeal On Cold Start Idle Bulletin No. I drove it another week the knocking noise was very annoying. What I found was some slight side to side play. Clean the pulleys good with brake cleaner to remove the wd-40 you don't want that on your new belt. The LM2/LZ0 Duramax is configured to pulse the injectors up to 10 times for emissions, noise and performance. The earlier (pre-04) truck had a lower fan drive ratio, and it is quieter, and more efficient. I recently replaced an idler, the AC compressor, power steering pump/pulley and put a new belt on it and it started doing it then. Looks to be LML style. Install the new pulleys in reverse order 8. 5-2005 (LLY) 6. Oct 9, 2022 路 Happens exactly twice almost always. Mar 28, 2017 路 馃嚚馃嚤 馃殕2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite AirEFI'd by Rob 馃嚭馃嚥馃殯 2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air Sep 15, 2016 路 You might try and pull the drive belt and run it, try to duplicate the noise, confirm it's pulley related. Aug 5, 2012 路 Noise was still present. I suspected it was the alternator, and a quick spray of WD-40 while running on the alternator pulley would stop the squeak for a bit. 039 in) to the front from the flush Jul 20, 2007 路 Subject: LBZ LB7 LLY 6. Before I take it in and have looked at, I thought I would get someones opinion. Was able to fix on the side of the road though. Feb 21, 2009 路 Ya Id slip the belt off and check. I drove home for Easter yesterday, about 160 miles. mbrp 5" turbo exhaust (no muffler or cats) modified stock air intake, EFI by Kory Willis, Big Dipper stage IV trans, Precision ML, Pump rub fix, Alligator trans lines, Autometer guages, Airdog II-165, Ready Lift leveling kit, 285/75 Nitto Dune Grappler, Bilstein shocks, Cognito idler and pitman arm braces, PPE tie rod sleeves, fingerstick, blocker plate, pvc reroute Apr 25, 2014 路 2011 Silverado 3500HD SRW LML CCSB LTZ. So I was just wondering if something is wrong or what. The fact that it makes a noise when you try to crank it indicates that the park/neutral switch or clutch switch, as the case may be, is working properly. The belt back could be glazed. Nov 15, 2019 路 A belt chirp sound or metal-to-metal sound may be heard on some 2019-2020 Silverado HD, Sierra, HD and Silverado 4500HD/5500HD/6500HD models equipped with the 6. 2L Diesel Engine Duramax Third Generation: 2006-2007. Might even have enough play too tell right away which one. 4K Jul 29, 2009 路 Pre Duramax Discussion. Since that time, I have a 14mm socket, a rachet, idler pulley, a belt tensioner pulley (just in case ), and a spare GatorBelt in my truck. They are quick to change (10 minutes each) and about 1/3rd cheaper here and you don't wind up stranded along the side of the road. A head scratcher. 5-05 LLY Duramax Powertrain. Feb 27, 2017 路 Chevy / GMC Duramax 07. And cruising donw the road at 55 mph, no noise. The smooth idler pulley is one day old and from NAPA. 5-2hrs to replace and get the truck out the door. Mar 24, 2022 路 I'm experiencing a recurring sound while at idle near the tensioner pulley, possibly lower. Either that belt was extremely loose and walking around on the ribbed pulleys, which cut it into pieces, or you (DMAXfirefighter) are correct and one of the pulleys really is bent. Turbo's Stock and Aftermarket. I think that it's likely the belt, idler and tensioner pulley combination. The truck has 106k and I have no idea if they were replaced. Another possibilty for the chirp or whistle noise could be a blown out exhaust manifold gasket. He told me almost all pulleys for the diesels use a bearing 62032RSJ. 6 Duramax with just under 100 K miles. 2351 Views 11 Replies 8 Participants Last post by Vrabel, Sep 13, 2009 Jump to Latest T. remove the pulley. When the bearing seizes it takes the belt with it this can make for a bad day. Apr 28, 2023 路 Much of the noise generated by a diesel engine comes from the combustion process. 5-10 LMM Forums. After connecting those back up, I crawled under the truck and put a mechanics stethoscope up to an area 6 inches to the passengers side of the harmonic balancer on the flange and I hear a very distinct noise just like the metallic one captured in the video. Checked my idler pulleys initially, no drag, they seemed fine. The whining noise is missing now. 5 LB7 Duramax Powertrain Hard start? Grinding noise. Good luck. 11-16 LML Duramax Powertrain squeak. Feel for slop or grit in the bearings. Did notice the noise but it was very faint under front diver side of engine. 5 LB7 Forums. Once the part came in, it took around 1. I have 38k miles on it and having the same squealing noise that goes up and down with rpm's. Replaced with a new pump and noise is gone. I've had this happen to me. Jump to Latest 2K views 4 Oct 23, 2011 路 06 CCSB blue granite 20x10 hostile sprocket 305 nitto 420s 5" magnaflow 3" Mbrp DP EFI from ATP, S&B cold air Built trans from Mike L. Jun 25, 2021 路 I had this exact sound coming from my 2018 L5P. you need a new belt that'll solve your problem. To see which pulley/bearing it could be, take a digital temp gun and take a quick reading to see which one is the hottest. It does react to engine speed. When I drive the truck, I have a whine that corresponds to engine speed (i. Removed old pump, didn't see anything. Apr 2, 2022 路 All of a sudden had this problem out of no where have a lb7 partially built with 69k original miles. 0 mm (0. GMC '04 2500HD SLE CC D/A LB7 SB Summit White, LineX, Nicktane, JK headlight harness, JK fuel pump and harness, Banks exhaust, EFI Live, intake horn mod, Suncoast 6 speed conversion. The noise seems to cycle. same Aug 26, 2022 路 It is NOT, a turbo heat shield, power steering pump noise, normal turbo whistle, pulley noise or fan hitting a shroud. I only have the AFE stage 2 intake and the AFE 4" turbo back exhaust on it. 50x35 open country toyo's,cat lost, 4" exhaust and monster muffler,afe mp,deep trans pan,earl's larger trans cooler with electric fan,large fluidyne oil cooler,afe cold air intake,afe mp,3 downpipe,custom made air scoop,onboard air Jun 23, 2020 路 I have an 08 GMC Sierra 2500 HD with about 85,000 miles on it. Cluster lit up like a christmas tree, power steering quit working and power brakes quit working. Line-X over the Rail, Rockers and Side Steps, S&B Intake w/Donaldson Powercore G2 Filter & Scoop, Kennedy Twins/W Filter, Edge Insight CTS, Crown Performance SS Brake Lines, PPE Rear Diff Cover, Bushwacker Fender Flares, Cognito Leveling Kit with UCA's & Steering Braces, Rare Parts Tie Rods, Bilstein 5100's, KC Light Bar, Rigid Dually D2's, LT295/70R/18 Feb 12, 2016 路 Probably the belt tensioner or a pulley heading south. 6L Duramax Diesel Engine Accessory Drive Belt Chirp, Squeal or Squeak Type Noise at Cold Start Idle (Replace Accessory Drive Belt) #07-06-01-003 - (03/07/2007) Models: 2002-2007 Chevrolet Silverado (Classic) Feb 12, 2012 路 2006 Chevy Silverado . To verify, after properly warmed up, accelerate aggressively from a stop. you can rent or buy the tool to put it back on for like 20 bucks, IIRC there should be a little bit of shaft poking out of the pulley, if the Aug 23, 2020 路 Harmonic Balancer Sliding Back on Crankshaft July 22, 2020 A belt chirp sound or metal-to-metal sound may be heard on some 2019-2020 Silverado HD, Sierra, HD and Silverado 4500HD/5500HD/6500HD models equipped with the 6. 5L Diesel Forum. It took a little bit to get the air out of everything. •If the noise was not fully eliminated by the procedure in step 2, the power steering pulley may be adjusted with an allowable maximum variance of 1. Low pitch raspy wineing noise ????. Work the belt off all the pulleys and remove belt from vehicle. (Little tip here, Gates is the supplier who supplies Duramax LTD with the tensioner) 2006 2500HD LBZ 4X4 CC/SB LT3, 265/75R16, Rhino Liner, PCV Reroute, Resonator Plugged, 35w 6K HID Low Beam & Fog Lights, LED Interior Lights, ISSPro Pyro, Boost, & Rail Pressure Gauges in A Nov 27, 2015 路 Using a 3-jaw puller, remove the pulley from the shaft being careful not to damage the threads. Oct 25, 2009 路 I would at least check each pulley for any roughness and for noise, you'll know when you hit a bad one. I changed the idler pulleys and it is still there. Jan 23, 2009 路 2005 Chevy 2500HD Duramax LLY BANKS ram air intake, MBRP 4" exhaust, CAT DELETE and NO MUFFLER, EGR Deleted, Fisher SS ExtremeV plow, Auto Meter Gauges, Boost, Pyro, Fuel Pressure, turbo resenator blocked off, PCV Reroute. 6 Duramax and none of them had a loud knocking noise. • DEF Injector Noise: A tick noise may be heard coming from under the vehicle and typically it is heard at low vehicle speed and especially next to a building, such as when going through a drive through. So, if you hear a small bearing noise, look at these pulleys (2 on Duramax). Gatorbelt stop my squeking also. It does have a 4" exhaust and I have checked for clearance issues and there is none. Remove the tensioner pulley 5. Dec 15, 2019 路 6. : 07-06-01-003 Date: March 07, 2007 TECHNICAL Subject: LBZ LB7 LLY 6. Do we know who makes them for AC Delco? I have access to Gates pulleys. Jan 3, 2015 路 1. press out the shaft and bearing assembly. As I see it the main suspect is the battery cable or terminal. 6L Duramax diesel engine (RPO L5P, L5D). Check those idler pulley's carefully. 5-10 LMM Duramax Powertrain Water pump whine after fix, need opinion! Jump to Latest Dec 7, 2014 路 My idler pulleys we both getting loose and had some excessive noise. It sounds like it is up front on the engine near the alternator or below it. Alteast that is where the sound is strongest. Apr 1, 2013 路 I have a 03 LB7. Looked at the exhaust and can't find Jun 10, 2013 路 It started making a scraping noise, which I first thought was bearings on the idler or tensioner pulley going bad. 3K views Jul 19, 2017 路 If so, then move towards the front, removing the drive-belt and try to duplicate, as it could be a pulley or belt driven component. if a bit of penetrating oil shot directly into a pulley's bearing quiets it, it is time to replace Mar 22, 2012 路 I have what I think is the same noise. turbo noise Mar 26, 2019 路 I am pretty familiar with the duramax motors and have done my fair share of working on them (replacing injectors, CP3 and much more). the sound changes pitch when the transmission shifts). I have replaced both idler's, and tensioner pulley's before, they do not appear to be the culprit. Sep 27, 2016 路 I presume that you have owned this truck for a while and know how to start it. Feb 13, 2010 路 It makes the noise if it's on or off. So unless the fan pulley also runs the water pump, I'm certain it's the fan clutch making the noise. strange noise. Alternator, tensioner, P/S pump and pulley and the grooved idler pulley are Duralast. I put a mbrp downpipe and 4in mbrp strait piped exhaust on in January and it never made the noise till today. Install the new/existing belt, make sure it is lined up properly in all of the grooves 9. I was letting my truck warm up and heard some squeeks and clatter sounds, but when I made it out there I heard a clunck and then some pieces fell to the ground. I figured maybe an idler pulley or belt going so I changed them along with tensioner no luck. It sounded especially great since the annoying vacuum pump wasn't running and making that terrible ticking sound. It's possable you have a bad bearing or the tensinsor is going out. -recent oil sample came back clean-checked all fuses-Replaced fuel filter Dec 1, 2011 路 Chevy / GMC Duramax 04. Jan 13, 2010 路 2004. When the GM Part came in the next day it too looked exactly like the DHD pulley. Jun 7, 2013 路 If the pulley needs to be realigned on the power steering pump shaft, follow the published SI procedures for the power steering pulley replacement. 6. Drives normally, but I got a long trip planned. It seems that there is a push to use the OEM pulleys. remove snap ring behind pulley. When we tried narrowing it down, we took the belt off and the noise was still there. May 6, 2009 路 I have a 2001 6. But then you got to ask yourself how long is that pulley's bearing actually going to last, too. Sep 30, 2011 路 So a bad pulley can make this screaching noise? It happens when I take off and get up to speed, but if I baby it up to speed, no noise. Tensioner and fan clutch don’t feel abnormal. The alternator and tensioner pulley should spin freely without mutch resistance if any. Got some feedback that towing is hard on the power steering fluid so I just flushed and replaced that but noise is still there. For the other pulleys, they carry a bearing. Nov 30, 2022 路 You were right!! It was my tensioner pulley. Jul 25, 2010 路 Belt is Dayco and 5 months old. Aug 20, 2020 路 Chevy / GMC Duramax 2017+ L5P Forums. Take the belt off the alternator first and then release the tentioner. I assume that maybe the teeth on the pump gear had small deficiencies that caused this noise. and of course the Alternator will complain. After some experimentation discovered it was an idler pulley. Jump to Latest 5. It may be coming from behind the alternator somewhere but it is very difficult to tell for sure. Leaning toward pulley noise. The P/S pulley is a press fit and may need to be moved as little as 1/32, in or out, to eliminate a chirp and funky belt rib wear. When you are in the cab, it sounds like it is on the passenger side. Jan 6, 2018 路 My 07 LBZ duramax started getting a noise that could only be heard under part throttle a few weeks ago. Suck Squeez Bang Blow 06 LBZ with 5 inch magnaflow exhaust,Bd exhaust manifold, Bully dog outlook, Fass 150, EFI by Rob, SC4 TC1056, transfer case brace, hid 8k on highs and lows Jun 29, 2013 路 2006 LBZ duramax silverado CCSB 4x4. Take the belt off, use a long screwdriver as a stethoscope and spin each pulley and see which one is making noise. Apr 22, 2016 路 The other pulley seems ok but it seems that I should replace it while I have it apart based on the threads I have read. the idler is def bouncing around trying to keep the belt tight Dec 15, 2013 路 Duramax First Generation: 2001-2004 (LB7) Tension Pulley Rattle Noise. The pulley had totally melted and the belt came off. 5 (LBZ & LLY) Top Contributors this Month Sep 10, 2009 路 Noise from pulleys. Oct 20, 2009 路 I just called NAPA and they carry the tensioner pulley. I have replaced plenty of those (2001). Water pump is gear driven, no overheat probs, just will be lacking in steering and brake boost. None of my other trucks had this loud of a thumping sound. I'd be looking at the belt and pulleys, unless you clearly just have a lot of fan noise. Got in the truck, revbed up motor several times, still no further noise. Here are the things I have checked:-fuel type or station doesn't make a change-no abnormal vibrations, it's a diesel, duh. All is good now. Oct 9, 2014 路 6. Since the noise seemed RPM related, I power braked the truck a bit and sure enough she sounded great with no hum/whining noises. 6L V8 Oct 20, 2022 路 My friend listened to it and suggested I replace the idler pulleys and belt tensioner. Jul 1, 2014 路 the new belt will always be smaller then the old as they stretch over time, if it fit, and the tensioner was not in a ridiculous place then the belt is probably right. Goerend ML-R Nov 26, 2010 路 the week i got my truck i was on my way to omaha, ne and the idler locked up on my a few miles east of sterling, co. every option with the exception of rear seat video. 5 2500 CCSB LTZ 4X4 Apr 21, 2018 路 If its a very faint noise that you can barely hear, and its a high rpm (dental-drill-like noise,) its most likely the turbo. Hate I had to find out while driving down the road. May 21, 2018 路 My findings on belt chirp/squeal it's usually a belt replacement that fixes it, if it's constant noise I use a stethoscope to isolate which idler pulley bearing or tensioner is at fault. Dec 11, 2014 路 Chevy / GMC Duramax 01-04. Turn every pulley and component. 73 rear, stock tire size bully dog , 5 inch turbo back, with 6 inch tip. wouldnt have been that bad but it was a sunday so the dealers in sterling were closed and napa and oreilly didnt have the right pulley. Jump to Latest Grinding noise. Jan 26, 2009 路 Is the pulley next to the belt tensioner pulley the Idler pulley I believe it is but can't find a diagram that shows what each one is. The information found in this bulletin can be Mar 10, 2016 路 2018 3500SRW CCSB Z71. 5 LB7 Duramax Powertrain. The pulley is quite tightly pressed on the shaft so I exerted some pressure on the pulley, sprayed some Kroil around the mating point of the shaft and pulley and then struck the puller center bolt with a hammer and it started to release from the shaft. I used the stethoscope to listen to the starter, passenger up pipe/egr, oil pan, and lift pump with no luck. -recent oil sample came back clean-checked all fuses-Replaced fuel filter May 12, 2013 路 Chevy / GMC Duramax 04. Feb 24, 2019 路 I figured the balancer could also be rubbing something and me hear that noise at the pump. Mar 15, 2022 路 What I'd wanna know is how that belt separated two ribs. Thanks! Oct 25, 2010 路 Bought belt and the first pulley at the local discount auto parts store at a much higher cost for the same bearing and belt. Don't get stuck on the side of the road for the price of this pulley. 5 LLY Xcab. It does not sound like necessarily coming from the engine but in the front loser to the grill. Will update as soon as I find out more. Jan 4, 2007 路 Last winter my idler pulley decided to take a crap on me downtown Chicago! The bearing gave the ghost and the pulley flew outta there. Noise suddenly stopped. Well after a couple good rains that squeal turned into something the truck did all the time. Jump to Latest Follow Jun 7, 2013 路 If the pulley needs to be realigned on the power steering pump shaft, follow the published SI procedures for the power steering pulley replacement. S. press or chisel out the soft plug. So I don’t think it’s coming from the tensioner pulley. Removed the balancer and nothing was rubbing, so noise was coming from pump. I have a replacement tensioner on the way and will replace it and the bearings in the others next week. I replaced the; tensioner, belt, and idler pulleys. Once you have made it to this point you will understand how to Mar 20, 2015 路 All new fluids.
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