Engine mount replacement instructions

ANDREW0367

MEMBER
2008 CHEVROLET SILVERADO
6.6L
V8
4WD
AUTOMATIC
50,000 MILES

Vibration like rumble strips. Upon letting off of gas and slow down. Goes away upon acceleration.

Thursday, May 2nd, 2019 AT 12:55 PM

5 Replies

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

This could be a few different things. Here they are in no apparent order. 1) Wheel bearing(s) 2) U-joint(s) 3) Motor mount(s) 4) Transmission mount(s). So, you probably processed the information like me, start with the easiest first. I have included the information on the motor and transmission mounts in the diagrams down below for you. Please go through the diagnostic guide for the engine mounts and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros

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Thursday, May 2nd, 2019 AT 2:52 PM

CHUCKNORRIS007

MEMBER
2 POSTS
2006 CHEVROLET SILVERADO
V8
4WD
AUTOMATIC
100,000 MILES

6.6 Diesel. My truck has developed a vibration under load that is sometimes constant and sometimes goes away at various times. It also vibrates at idle sometimes. I had it at the dealer thinking that it was the u-joints but they found nothing. I would have assumed that they would have checked the motor mounts as a next step but didn't. The mechanic that I usually take my truck to is 100 miles away and I didn't want to take the chance of driving that far. By phone call he suggested it might be a motor mount. He has always been able to find problems in the past and take care of them. He's about the only one I trust. Are the motor mounts difficult to change? I can fix most things if I know what's wrong, I'm just not a good trouble shooter. Thanks in advance.

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Thursday, February 25th, 2021 AT 8:39 AM (Merged)

SCOTTY DEE

MECHANIC
592 POSTS

Unless you have had some oil leaking and contaminating one of the mounts, I doubt if thats a problem. I would be prone to a thorough inspection of all chassis components. Vibration at idle? Again check for any oil contamination at the mounts.

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Thursday, February 25th, 2021 AT 8:39 AM (Merged)

RICOSCHEVYTRUCK

MEMBER
1 POST
1994 CHEVROLET SILVERADO
4 CYL
2WD
AUTOMATIC
180,000 MILES

I have a 1994 Chevy Silverado with a 4.3 engine and would like to replace it with a 1995, 5.7 engine model. I would like to know which motor mounts I will need to use? Thank You.

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Thursday, February 25th, 2021 AT 8:39 AM (Merged)

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

First, we only recommend direct fit replacement parts because so many other things can go wrong when you change things like this. As far as the mounts, just buy the ones for a 5.7. They should bolt right in place for you. However, remember, sensors, computer, vacuum lines, wiring. Will all need modification.