Lowering Question
Thread Starter
Pro
Joined: Dec 2005
Posts: 619
Likes: 2
From: Destin FL
Lowering Question
2002 Coupe. Today I adjusted the ride height (following several DIY threads on the forum). Question: Front adjusting bolt appears to be sitting on top of a rubber bushing (between the foot on the bottom of the adjusting bolt and the top of the lower A arm). Mine are in really bad shape. Is that rubber bushing part of the A arm or part of the adjusting bolt foot? Is it replacable? What's the proper name for it and where do I get one?
Drifting
Joined: Jan 2012
Posts: 1,341
Likes: 8
From: Hopatcong New Jersey
It's a rubber bushing that is part of the bolt. A lot of people cut them off with a hacksaw to they their cars another 1/2" lower.
You don't need to replace them, they're solid...trust me, I've hacked through a spare set before.
You don't need to replace them, they're solid...trust me, I've hacked through a spare set before.
Last edited by dblerman; Nov 29, 2012 at 07:46 PM.
Thread Starter
Pro
Joined: Dec 2005
Posts: 619
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From: Destin FL
Mine are not solid at all. Even though I jacked up the spring to get the tension off the bolts, the bushings turned with the bolts and are partially destroyed, sticking out much farther on one side so they are not centered anymore. The aftermarket front lowering bolts that I've seen advertised don't appear to have any kind of rubber bushing under the bottom of the foot pad. I don't know what the stock bolts look like. Is it even possible to flex the spring high enough to get the bolt completely out without damaging the spring?
Le Mans Master
Joined: May 2007
Posts: 5,393
Likes: 17
From: Belleville Mich.
2002 Coupe. Today I adjusted the ride height (following several DIY threads on the forum). Question: Front adjusting bolt appears to be sitting on top of a rubber bushing (between the foot on the bottom of the adjusting bolt and the top of the lower A arm). Mine are in really bad shape. Is that rubber bushing part of the A arm or part of the adjusting bolt foot? Is it replacable? What's the proper name for it and where do I get one?
Original GM adjuster bolts have a thick rubber bushing on the bottom.
You cannot buy these GM adjusterbolts.
You would have to purchase an aftermarket adjuster.
www.Zip-products.com carries them.
Aftermarket adjuster on the left with thin rubber pad & GM adjustment bolt with bushing on the right.
Drifting
Joined: Jan 2012
Posts: 1,341
Likes: 8
From: Hopatcong New Jersey
After seeing how much effort it took to cut through the bushings with a hacksaw I'm curious to see how yours got destroyed.
Le Mans Master
Joined: May 2007
Posts: 5,393
Likes: 17
From: Belleville Mich.
What happens is the bottom of the GM bushing ends up "bonded" to the arm.
So after awhile if left in that kind of condition the bushing dosen't slide on the arm any more & becomes distorted.
Bell, check your pm box.
So after awhile if left in that kind of condition the bushing dosen't slide on the arm any more & becomes distorted.
Bell, check your pm box.
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Drifting
Joined: Jan 2012
Posts: 1,341
Likes: 8
From: Hopatcong New Jersey
Okay, I gotta ask... Why would the bushing slide on the control arm? Hundreds of pounds of force are being applied between the control arm and the lowering bolt, it should not be sliding. If it did, the rubber would tear off on the first bumpy road you drove down.
Safety Car
Joined: Aug 2011
Posts: 4,439
Likes: 405
From: Portland OR
It slides. Take the lower arm off the car, and you will see the wear marks.
The A-arm travels in an arc, so it has to slide.
The material of the pad is rather like a hard plasticised rubber.
And Bumble is correct, they do end up stuck to the arm and the pad distorts. The bolt then ends up bending.
One of my bolts was bent....and stuck in the spring. When I bought Z06front spring, it had a bent bolt in it as well.
It is probably a good idea to apply some grease under the pad.
Ron
The A-arm travels in an arc, so it has to slide.
The material of the pad is rather like a hard plasticised rubber.
And Bumble is correct, they do end up stuck to the arm and the pad distorts. The bolt then ends up bending.
One of my bolts was bent....and stuck in the spring. When I bought Z06front spring, it had a bent bolt in it as well.
It is probably a good idea to apply some grease under the pad.
Ron
Le Mans Master
Joined: May 2007
Posts: 5,393
Likes: 17
From: Belleville Mich.
Well, whether it is slides or not,
When those GM stock bushings are subjected to forces front & backwards, after a while the bushings become distorted.
Instead of being straight they become angled.... looking like the Leaning Tower Of Pisa.
When those GM stock bushings are subjected to forces front & backwards, after a while the bushings become distorted.
Instead of being straight they become angled.... looking like the Leaning Tower Of Pisa.
Drifting
Joined: Jan 2012
Posts: 1,341
Likes: 8
From: Hopatcong New Jersey
Damn, that's crazy. I didn't think it could damage a bolt that bad. When I lowered my car I couldn't turn the bolts, they were completely frozen in the threaded sleeves. PB blaster for 48 hours, torch, even tried using a pipe wrench on the bushing and didn't budge...Figured I would cut the bushings to get it lowered since I couldn't turn the bolt..Took about 30 minutes of sawing with a hack saw to get through the bushing. Car didn't get as low as I wanted. Ended up removing the spring from the car and clamping the bushing in a vise and used the spring as leverage. Broke the sleeve from inside the spring before the bolt would break loose. Decided to call it quits and picked up a used spring for $25. 
After seeing how much beating the bushing could take I just assumed they were indestructable
After seeing how much beating the bushing could take I just assumed they were indestructable
Thread Starter
Pro
Joined: Dec 2005
Posts: 619
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From: Destin FL
Also, I've discovered that Mid America has a pdf Tech Instructions for the aftermarket replacements for these bolts and their recommendation is, "... be sure to apply a generous amount of Silicone Lube or Grease to the spring cushions".
Safety Car
Joined: Aug 2011
Posts: 4,439
Likes: 405
From: Portland OR
