Body Mounts - ruber or poly?
Thread Starter
Melting Slicks
Joined: Jul 2000
Posts: 2,848
Likes: 0
From: Beacon NY
Body Mounts - ruber or poly?
I'm planning to remove my body this fall/winter so I can paint my frame and I figure that I might as well replace the body mounts while I'm at it.
I've noticed that there are two kits for sale from Zip - a kit with Ruber mounts (for about $160) and a kit with poly mounts (for $90).
Does anyone know the differences between the two? Is the rubber kit worth the extra $70?
Thanks in advance.
I've noticed that there are two kits for sale from Zip - a kit with Ruber mounts (for about $160) and a kit with poly mounts (for $90).
Does anyone know the differences between the two? Is the rubber kit worth the extra $70?
Thanks in advance.
Race Director
Joined: Feb 1999
Posts: 16,978
Likes: 7
From: In Dreams There Is Truth Ohio
Poly mounts are plastic derivative, hence solid...use the rubber, it will be decades and decades before you have to change them, not to mention the ride comfort...68-72 used aluminum mounts...talk about a jarring experience...i cringed everytime I saw a bump in the road...
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
Originally Posted by Van Steel
Rubber bushing for the body mounts are the way to go. Takes a lot of the vibration out. With poly you'll feel everything.I just replaced mine with poly - I don't have a vibration problem at all..... it feels different, a lot better than with the worn 26 year old rubber... less cracking noises.... but vibrations ?? nope..... since you have a lot more experience with Corvettes than I have I'm wondering if you base your judgement on C3s with highly modified engines ?? As far as I know mine has rubber engine mounts, maybe that's why it's not transfering vibrations into the frame/body ???
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
Originally Posted by cardo0
Installed poly mounts on my GTO and it felt like a tank. Gave me anxiety just looking at the lane bumbs. 
Never again.
cardo0
Never again.cardo0
i'd like to know why mine are fine...... I'm confused now.....
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Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
Decades and decades out of rubber mounts/bushings is hopelessly optomistic. My '77's rubber parts were well compressed and crumbling at 15 years...they're downright awful now. It can't ride any worse with poly than it does now...
Drifting
Joined: Apr 2003
Posts: 1,323
Likes: 2
From: Castle Hills Texas
Can most of these body mounts be replaced with the body still on the car? I am not smart in the ways of these issues. I know that the mount I can see through the rear passenger side wheel well, #4 I believe, looks like it has mostly vanished into rubber dust. My car is an 80 by the way, if that matters.
Le Mans Master
Joined: Jun 2002
Posts: 8,339
Likes: 24
From: I can walk to MA
I decided on poly for longevity.
One thing I noticed was the rubber mount design seemed
to collect and hold water. This accelerated the demise
of my 75 frame and birdcage. The greased-up poly mounts
should avoid this issue - plus they are not susceptible to
oil/gas contamination like rubber is. Then there is the almighty
deciding factor ... co$t.
One thing I noticed was the rubber mount design seemed
to collect and hold water. This accelerated the demise
of my 75 frame and birdcage. The greased-up poly mounts
should avoid this issue - plus they are not susceptible to
oil/gas contamination like rubber is. Then there is the almighty
deciding factor ... co$t.
