Repairing Rear Suspension Mounting Holes?

[hawkfan]

What can be done to fix elongated suspension mounting holes on a G body 4 link? The only solution I've seen is welding a washer in there. But what if the damaged hole is on the frame side?

 

[pontiacgp]

if the hole is the stock size will a 1/2" cover the elongation? If so you can use poly bushings and 1/2" bolts. Or you can cut a hole in the frame to do the repair and patch the hole in the frame after the repair is done

 

[hawkfan]

if the hole is the stock size will a 1/2" cover the elongation? If so you can use poly bushings and 1/2" bolts. Or you can cut a hole in the frame to do the repair and patch the hole in the frame after the repair is done

I'll have to check it again to see how bad it is. I was in the process of replacing some boxed poly lcas with some Umi poly/roto arms when I noticed it on the drivers side. I guess I was too late. I had to get the car back together so I could move it, but will take a closer look at everything this weekend. I though I was okay with poly since I had sphericals in the rear housing ears and this is only a street driven car. I guess I was wrong.

 

[pontiacgp]

You could also open the hole to use a short bushing on the bolt to fill the hole. I would make the hole in the frame a few thousands smaller than the bushing and drive the bushing in when tightening the bolt

 

[hawkfan]

You could also open the hole to use a short bushing on the bolt to fill the hole. I would make the hole in the frame a few thousands smaller than the bushing and drive the bushing in when tightening the bolt

I haven't thought of that. Thanks!

 

[Clone TIE Pilot]

I'll have to check it again to see how bad it is. I was in the process of replacing some boxed poly lcas with some Umi poly/roto arms when I noticed it on the drivers side. I guess I was too late. I had to get the car back together so I could move it, but will take a closer look at everything this weekend. I though I was okay with poly since I had sphericals in the rear housing ears and this is only a street driven car. I guess I was wrong.

The stock 4-link depends on the rubber bushings to deflect and the stock arms to twist to prevent binding, twisting, and damaging the suspension mounts. In a 4-link something has to twist, and when you install boxed arms and poly bushings you only transfer more of the twisting into the frame itself, you don't reduce the twisting. Street driving is very stressful and harsh on the suspension since it must travel much more than on a smooth race track. Boxed arms and poly bushings are really only meant for race track use, not normal driving. Even poly rotojoints, are a bandaid between a flexible stock setup and a rigid aftermarket setup which is I'll suited for street driving.

 

[Rktpwrd]

The stock 4-link depends on the rubber bushings to deflect and the stock arms to twist to prevent binding, twisting, and damaging the suspension mounts. In a 4-link something has to twist, and when you install boxed arms and poly bushings you only transfer more of the twisting into the frame itself, you don't reduce the twisting. Street driving is very stressful and harsh on the suspension since it must travel much more than on a smooth race track. Boxed arms and poly bushings are really only meant for race track use, not normal driving. Even poly rotojoints, are a bandaid between a flexible stock setup and a rigid aftermarket setup which is I'll suited for street driving.

 

[Rktpwrd]

Rating my post as dumb does not qualify you to know what the hell you're talking about. That is your opinion, and you're entitled to it. But don't go off spouting it as fact.
I as well as many others on here have and will continue to run boxed LCA's and poly bushings and whatever else you deem as being unacceptable with no problems whatsoever. On the street, on the track, wherever you like.
Get a life, and go join a restoration board. You're obviously more suited to that.
😡

 

[Clone TIE Pilot]

See you are sticking your fingers in your ears and singing la la la, LOL.

 

[Rktpwrd]

See you are sticking your fingers in your ears and singing la la la, LOL.

Whatever dude. Grow up.