Recent Topics
TW Ceramic Spray First Time
by Toros - 05/31/20 02:49 PM
The perfect tractor oil
by Chris142 - 05/31/20 02:42 PM
5.7 HEMI Lifter/cam failure cause
by Skippy722 - 05/31/20 02:38 PM
Battery 2013 4Runner 4WD
by Gebo - 05/31/20 02:29 PM
Supermarket Heroes 500 at Bristol
by bdcardinal - 05/31/20 01:55 PM
More M1 changes
by Flashlightboy - 05/31/20 01:49 PM
Car Reviewers
by borgward - 05/31/20 01:43 PM
Final charge global extender
by mker - 05/31/20 01:15 PM
Rotella Multivehicle 5W-30
by js1956 - 05/31/20 10:54 AM
Tesla Model 3 Driving Guide
by JeffKeryk - 05/31/20 10:41 AM
Keep OE carb vs replacement
by JHZR2 - 05/31/20 10:00 AM
Gave away some of my stash
by Chris142 - 05/31/20 08:32 AM
Two year check in - Dewalt 20 V String Trimmer
by Snagglefoot - 05/31/20 08:07 AM
Sturmey Archer 3 Speed-Shifting?
by ET16 - 05/31/20 07:45 AM
Power washing your home
by ARB1977 - 05/31/20 07:05 AM
Clint Eastwood car collection.
by PimTac - 05/31/20 04:51 AM
Bulk Oil Setup
by Jason_Michaels - 05/31/20 04:39 AM
Newest Members
AbbeyRoad, RPF, Rayi, juca, jrow96
71584 Registered Users
Who's Online Now
79 registered members (ABN_CBT_ENGR, ArrestMeRedZ, 928, 53' Stude, AlienBug, 1004ron, 7 invisible), 2,425 guests, and 20 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics306,097
Posts5,286,285
Members71,584
Most Online4,538
Jan 20th, 2020
Donate to BITOG
Print Thread
Hop To
2008 Dodge Ram 3500 - Turbo screech #5338992 02/02/20 12:17 PM
Joined: Oct 2010
Posts: 7,816
A
A_Harman Online Content OP
OP Online Content
A
Joined: Oct 2010
Posts: 7,816
Over the last couple of weeks, I have noticed a screeching noise every time I engage the exhaust brake function. This truck has a variable-geometry turbo that closes down the VG mechanism after a couple of seconds' trailing throttle. This assists decel of the truck when towing or heavily loaded. The problem started only occasionally during exhaust braking mode, but now the screech occurs every time, and is now even beginning to occur under hard acceleration when the turbo is putting out high boost.

Has anybody else out there had this problem on the 6.7L Cummins?

I am theorizing that the thrust bearing in the turbo may be going out, and would require an expensive repair. Are there other possible causes for the screeching noise?


2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Re: 2008 Dodge Ram 3500 - Turbo screech [Re: A_Harman] #5339014 02/02/20 12:48 PM
Joined: Oct 2010
Posts: 1,377
M
mattd Offline
Offline
M
Joined: Oct 2010
Posts: 1,377
Check for exhaust manifold leaks or cracks, or any other pre turbo exhaust leaks for that matter (including EGR piping). Also check the turbo for any excess bearing play.

Last edited by mattd; 02/02/20 12:51 PM.

2007 Ford F-350 4x4 6.0 PSD

ASE Master, L1, L2
Re: 2008 Dodge Ram 3500 - Turbo screech [Re: A_Harman] #5339024 02/02/20 01:02 PM
Joined: Jun 2015
Posts: 41
D
Dodgetracker Offline
Offline
D
Joined: Jun 2015
Posts: 41
Not sure if it's the same or not but mine it was more like a "turbo bark" and it only happened under acceleration. Like cruising down the hwy and accel to pass type. It did it for over a year and a half. Nothing else seemed out of place, there wasn't a hesitation or stumble of any kind just the bark. It also did it in cruise and going uphill when you could feel the truck giving more fuel to climb. Turbo eventually went after cel and dealership replaced on my dime.

Hope this helps and I hope this isn't the case for you.


2008 Dodge Ram 2500 4x4 6.7 CTD 68RFE.
2004 Jeep Wrangler 4x4 4L Straight 6 Auto.
Re: 2008 Dodge Ram 3500 - Turbo screech [Re: A_Harman] #5339118 02/02/20 02:49 PM
Joined: Jun 2003
Posts: 20,833
C
Chris142 Online Content
Online Content
C
Joined: Jun 2003
Posts: 20,833
Its easy enough to pull the intake boot and see if there is excessive play in the turbo. I will 2nd the air leak,likely one of the boots


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: 2008 Dodge Ram 3500 - Turbo screech [Re: A_Harman] #5339154 02/02/20 03:32 PM
Joined: Nov 2009
Posts: 5,959
M
motor_oil_madman Offline
Offline
M
Joined: Nov 2009
Posts: 5,959
Mileage?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: 2008 Dodge Ram 3500 - Turbo screech [Re: motor_oil_madman] #5339234 02/02/20 04:53 PM
Joined: Oct 2010
Posts: 7,816
A
A_Harman Online Content OP
OP Online Content
A
Joined: Oct 2010
Posts: 7,816
Originally Posted by motor_oil_madman
Mileage?


180,000 miles-ish


2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Re: 2008 Dodge Ram 3500 - Turbo screech [Re: A_Harman] #5339290 02/02/20 05:46 PM
Joined: Aug 2014
Posts: 498
O
ofelas Offline
Offline
O
Joined: Aug 2014
Posts: 498
1/ Manifold gasket leaks; check for soot trails, and replace with MLS gaskets if needed.

2/ Check for lateral & back'n'forth play on your compressor wheel.

3/ Check for boost leaks - they can make banshee noises at times. 4" plumbing cap + Schrader valve + 20 psi regulated air, no more than a 3-5 psi drop on your boost gauge if your crank is at the correct position.

4/ Clean the turbo vanes; Mopar sells an outstanding soak/cleaner.

5/ Is your '08 deleted?

6/ No difference between 5.9 vs 6.7 as far as your issue ;-)

7/ Junk the Holset & go SXE + 4" downpipe, if your turbo is beyond salvage. Rebuild vs R&R, depending on your time/skillset.


R12 in the summer, Webasto in the winter, and cassette tapes all year.
Re: 2008 Dodge Ram 3500 - Turbo screech [Re: ofelas] #5340260 02/03/20 08:18 PM
Joined: Oct 2010
Posts: 7,816
A
A_Harman Online Content OP
OP Online Content
A
Joined: Oct 2010
Posts: 7,816
Originally Posted by ofelas
1/ Manifold gasket leaks; check for soot trails, and replace with MLS gaskets if needed.

2/ Check for lateral & back'n'forth play on your compressor wheel.

3/ Check for boost leaks - they can make banshee noises at times. 4" plumbing cap + Schrader valve + 20 psi regulated air, no more than a 3-5 psi drop on your boost gauge if your crank is at the correct position.

4/ Clean the turbo vanes; Mopar sells an outstanding soak/cleaner.

5/ Is your '08 deleted?

6/ No difference between 5.9 vs 6.7 as far as your issue ;-)

7/ Junk the Holset & go SXE + 4" downpipe, if your turbo is beyond salvage. Rebuild vs R&R, depending on your time/skillset.


Thanks for all the suggestions.
Answers to your questions:
5. No, it's not deleted.

7. What is an SXE? Is it a later-model turbo? Or aftermarket fixed-geometry?

I never learned about the later trucks, other than to avoid emissions controlled diesels of any kind. But it became impossible to keep running my 19-year-old truck, and my dispatching company doesn't like to allow any truck older than 10 years. They allowed the 2008 because it was a step up from the 2001. The new truck is more difficult to work on than the old truck. I used to be able to check turbo bearing play in about 5 minutes on the '01, but the '08 has some kind of fancy inlet air duct to the compressor that is way more complicated to remove. And the turbo is mounted low and further back in the engine compartment, making access more difficult. There is so much extra plumbing related to the EGR system surrounding the exhaust manifold that a thorough inspection for cracks is impossible.


2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Re: 2008 Dodge Ram 3500 - Turbo screech [Re: A_Harman] #5340287 02/03/20 08:46 PM
Joined: Feb 2015
Posts: 1,176
B
BrianF Offline
Offline
B
Joined: Feb 2015
Posts: 1,176
Any codes? All I can do is relay some info from cumminsforum. A guy was having a similar sound on his 2018 and found the turbo actuator was on it's way out.

Good luck!


2006 Trailblazer LT. QSUD, Fram Ultra.
2017 Ram 3500 SLT Megacab. Duron SHP 10w30, Baldwin BT7349.
1993 GMC 1500. QSAD, Fram PH5
Re: 2008 Dodge Ram 3500 - Turbo screech [Re: A_Harman] #5340412 02/03/20 11:04 PM
Joined: Dec 2013
Posts: 4,532
C
clinebarger Offline
Offline
C
Joined: Dec 2013
Posts: 4,532
The air intake boot isn't to bad to get off.....

Disconnect the MAF connector & filter restriction sensor if equipped, Loosen the boot clamp on the filter lid & remove the lid, Remove the air filter, Remove the 13mm headed bolt that holds the filter box, Remove the filter box by pulling it straight up....Out of the rubber isolators.

Loosen the boot clamp at the Turbo compressor, Now onto the fun job of removing the Crankcase Vent Hose! Having a spring clamp tool is best, While the clamp is spread open....Try to wiggle the silicone hose off, If no success, You will need a Hose Pick to break the seal.

Do Not try to slide the clamp down the hose out of the way as it's crimped to the end of the hose with a little tab! Once the Boot & Vent hose is on the bench.....I cut the little tab of with some side cutters so the clamp can be slid into & out of position making future servicing much easier.

I anyone has had any of the intercooler boots off & didn't clean the oil off them.....They will make noise!


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: 2008 Dodge Ram 3500 - Turbo screech [Re: clinebarger] #5342093 02/05/20 06:53 PM
Joined: Oct 2010
Posts: 7,816
A
A_Harman Online Content OP
OP Online Content
A
Joined: Oct 2010
Posts: 7,816
Originally Posted by clinebarger
The air intake boot isn't to bad to get off.....

Disconnect the MAF connector & filter restriction sensor if equipped, Loosen the boot clamp on the filter lid & remove the lid, Remove the air filter, Remove the 13mm headed bolt that holds the filter box, Remove the filter box by pulling it straight up....Out of the rubber isolators.

Loosen the boot clamp at the Turbo compressor, Now onto the fun job of removing the Crankcase Vent Hose! Having a spring clamp tool is best, While the clamp is spread open....Try to wiggle the silicone hose off, If no success, You will need a Hose Pick to break the seal.

Do Not try to slide the clamp down the hose out of the way as it's crimped to the end of the hose with a little tab! Once the Boot & Vent hose is on the bench.....I cut the little tab of with some side cutters so the clamp can be slid into & out of position making future servicing much easier.

I anyone has had any of the intercooler boots off & didn't clean the oil off them.....They will make noise!


I spent a couple of hours chasing down these things. After I got the turbo inlet ducting removed, I pushed and pulled and twirled the turbo shaft, and found no end play or evidence of roughness in the bearings. There was radial play, but that's normal for a turbo with floating bearings.

I carefully inspected the charge air boots, and they were all clean, dry, tight, and had no splits in them that I could see or feel.

I looked at as much of the exhaust manifold that I could, and found no carbon tracking or cracks. But there is a lot of it that I couldn't see.

I have had a thought: How about the turbo inlet gasket? What is involved in replacing that?


2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™