Clunking in reverse. UPDATE - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-16-2005, 05:15 PM   #11
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Quote:
Originally Posted by KEOTOK
Observe from the fender side and not from in front of the car. Sos ya dont get run over. If something happens, then all you hafta do is step outta the way of the mirror.
Very good saftey point...

Please head that warning..

And can anyone else jiggle their passenger front motor mount?

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Old 03-16-2005, 06:15 PM   #12
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Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by opensourceguy
Mine are shot.. holy crap they are killer horrible. My engine moves about 1" in park! I don't even want to think how bad it is in drive. I can move the engine a little by hand also.. so I know mine are all gone. And alec, you need to get a helper to observe the engine when in drive or reverse. Revving in park doesn't really do a whole lot of good, because the engine isn't under load.


-justin
Damn... I hadn't even noticed that... I guess 20+ hours will do that...

Yes you will want to observe the mounts under load... Have a friend or someone hold their left foot on the brake with the emergency brake applied... Very important to keep the brakes firmly planted...

Place the car in reverse and observe the engine movement, Give the throttle a slight tap to see if these is any movement..

Then place the car in drive and see how much movement you have... Reverse will tell you about the rear mounts, and drive will tell you about the front mounts...

Good Luck
Thanks, I'll have to try that. Me mounts are beginning to take out my ex. manifolds and/or surrounding exhaust area :o
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Old 03-17-2005, 01:54 AM   #13
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Which side is the clunking coming from??? Right? Left? Front? Back?
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Old 03-17-2005, 10:08 AM   #14
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Thanks for all the input. I'm not positive where the clunking is coming from. It really sounds like the front, but there'* times where it soulds like it could be coming from the back too. It'* weird because i can't really feel it, i can just hear it lost of the time.
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Old 03-17-2005, 08:40 PM   #15
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Ok today i was out and i had someone help me out. They sat inside while i did the gas under the hood. First of all, my motor is all OVER the place. I'm probably gonna need all the mounts, but at least both rears and the passenger front. But i noticed something else, when my mom was inside holding the brake and i was revving it, it didn't clunk! It rocked all over but didn't clunk. So as i backed out of the driveway i looked out my window to see what was goin on (i am almost positive it'* coming from the drivers front.) I noticed something very interesting. When it does the clunk, like when i hit the brakes, the drivers front wheel jumps. I can actually see it hop over and over when i hit the brakes. NOW who'* got any ideas?
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Old 03-17-2005, 09:13 PM   #16
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That engine should barely move. I'd start with all four mounts. The fact that the engine and tranny are moving that much is probably causing your wheel hop. The axles are connected to a moving drivetrain.
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Old 03-17-2005, 11:01 PM   #17
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My theory on the wheelhop: The tranny falls back far enough to bind the inner CV joint, locking it hard enough to counter act the suspension.

Fix the mounts soon or fix the mounts and a CV later.
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Old 03-18-2005, 12:12 PM   #18
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Ok i checked on GM parts direct for the 4 mounts i need, i just decided that from the input i need all of them. They want 335 dollars for the four!! That seemed way wrong to me so i went to autozone.com and found all four for 85 dollars. I thought GM parts direct was supposed to be less?
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Old 03-18-2005, 12:14 PM   #19
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It'* less for GM parts. AutoZone carries imported parts.
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Old 03-18-2005, 12:17 PM   #20
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Quote:
Originally Posted by alec_b
Ok i checked on GM parts direct for the 4 mounts i need, i just decided that from the input i need all of them. They want 335 dollars for the four!! That seemed way wrong to me so i went to autozone.com and found all four for 85 dollars. I thought GM parts direct was supposed to be less?
For a GM part yes... Go to the dealership and try to buy those mounts...

Autozone is where I would have told you to go for the mounts... I think they sell Pioneer or Anchor... I think these are actually one in the same.... Seem to be a decent replacement... But make absolutely sure the mounts are identical to the ones you will replace... Once you get the mount out set them side by side and examine them carefully...

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