Upper A-arm bump stop question
Thread Starter
Intermediate
Joined: Nov 2003
Posts: 33
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From: Windsor ON
Upper A-arm bump stop question
I am rebuilding the front suspension of my 1970 big block and want to replace the upper bump stops. The replacements that I bought are on the right and they are quite a bit bigger than the originals on the left.
Which would you use, the new ones and give up a half inch of suspension travel or the original deteriorated 42 year old ones? Anyone know if you can get correct replacements?
Which would you use, the new ones and give up a half inch of suspension travel or the original deteriorated 42 year old ones? Anyone know if you can get correct replacements?
Team Owner
Joined: Sep 2006
Posts: 31,160
Likes: 4,236
From: Westminster Maryland
Hi t,
It looks like 2 sizes may have been used during the 63-82 period. 63-75 and 76-82.
The originals on my 71 measure about the same as the smaller bushings in your picture. The do however have a nipple on the top, but it's much fatter than the one on the larger bushing in your picture.
Regards,
Alan
It looks like 2 sizes may have been used during the 63-82 period. 63-75 and 76-82.
The originals on my 71 measure about the same as the smaller bushings in your picture. The do however have a nipple on the top, but it's much fatter than the one on the larger bushing in your picture.
Regards,
Alan
Thread Starter
Intermediate
Joined: Nov 2003
Posts: 33
Likes: 0
From: Windsor ON
The other one looks the same. The surface has a rough pitted texture but they otherwise seem good. I'll clean them up like you suggest and use them since I don't want to mess up the travel. I guess if yours are trashed you don't have much choice but to use the larger replacements.
Thread Starter
Intermediate
Joined: Nov 2003
Posts: 33
Likes: 0
From: Windsor ON
Hi t,
It looks like 2 sizes may have been used during the 63-82 period. 63-75 and 76-82.
The originals on my 71 measure about the same as the smaller bushings in your picture. The do however have a nipple on the top, but it's much fatter than the one on the larger bushing in your picture.
Regards,
Alan
It looks like 2 sizes may have been used during the 63-82 period. 63-75 and 76-82.
The originals on my 71 measure about the same as the smaller bushings in your picture. The do however have a nipple on the top, but it's much fatter than the one on the larger bushing in your picture.
Regards,
Alan
So the C2 and early C3 ones are smaller. The suppliers all seem to have universal 63-82 replacements. The nipples on top of mine are long gone since there are minor scuff marks indicating that these have seen action in the past.
Do you think the nipple is big enough to actually cushion the suspension if the A-arm comes into contact?
Thanks, Tom
Team Owner
Joined: Sep 2006
Posts: 31,160
Likes: 4,236
From: Westminster Maryland
Hi Tom,
While the nipples on my originals are quite large they're still way to small to have any effect on the amount of movement of the control arm.
I wonder/think the nipple is a remnant of the manufacturing process.
Regards,
Alan
While the nipples on my originals are quite large they're still way to small to have any effect on the amount of movement of the control arm.
I wonder/think the nipple is a remnant of the manufacturing process.
Regards,
Alan
