High pitch whining noise with videos - Page 3 - Chevy and GMC Duramax Diesel Forum
Drivetrain Discussion on gearing, CV joints, driveshafts, axles, brakes, etc.

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post #21 of 24 (permalink) Old 08-05-2019, 09:20 PM
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Check the top radiator shroud. It connects via a 12MM bolt to I believe the oil filler tube. Loosen it, hold up the shroud and re tighten while holding. Sounds simple, and too good to be true, but I’ve heard this exact sound from the fan barely hitting the shroud under acceleration/deceleration.

2008 LMM 7”FTS LIFT 35’s on 20” wheels. All stock under the hood...Thanks California
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post #22 of 24 (permalink) Old 08-12-2019, 11:47 AM Thread Starter
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Quote:
Originally Posted by Hotsauce38 View Post
Check the top radiator shroud. It connects via a 12MM bolt to I believe the oil filler tube. Loosen it, hold up the shroud and re tighten while holding. Sounds simple, and too good to be true, but I’ve heard this exact sound from the fan barely hitting the shroud under acceleration/deceleration.
I will check into it thanks

2008 Chevy 3500 6.6l lmm
Airdog 4g lift pump
Wcfab ybridge and egr delete.
Edge monitor with egr probe
PPE RACE FUEL VALVE
Efilive by Cory Willis and switch
Flatbed with Hydraulic hayspear
3 inch lift, lifts for less.
PVC re route
65mm upgraded turbo
51 gallon aux tank
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post #23 of 24 (permalink) Old 08-13-2019, 11:13 AM Thread Starter
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Quote:
Originally Posted by Hotsauce38 View Post
Check the top radiator shroud. It connects via a 12MM bolt to I believe the oil filler tube. Loosen it, hold up the shroud and re tighten while holding. Sounds simple, and too good to be true, but I’ve heard this exact sound from the fan barely hitting the shroud under acceleration/deceleration.
So I looked at that and it didn’t even had a bolt in it. Wow I can’t get the noise to come back. I just don’t understand why when I had a trailer on it made the noise more. Maybe the fan was spinning faster? Well I need to get my trailer back on to see if that noise is officially gone but so far so good. I literally don’t believe it. Thank you so much! You’re a rockstar!

2008 Chevy 3500 6.6l lmm
Airdog 4g lift pump
Wcfab ybridge and egr delete.
Edge monitor with egr probe
PPE RACE FUEL VALVE
Efilive by Cory Willis and switch
Flatbed with Hydraulic hayspear
3 inch lift, lifts for less.
PVC re route
65mm upgraded turbo
51 gallon aux tank
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post #24 of 24 (permalink) Old 08-14-2019, 09:07 PM
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No problem! Glad it worked out. That’s one those situations where you immediately think worst case scenario over a simple fix.

2008 LMM 7”FTS LIFT 35’s on 20” wheels. All stock under the hood...Thanks California
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