Engine mount shim
Thread Starter
Racer
Joined: Jun 2006
Posts: 413
Likes: 3
From: Frankfort Illinois
Engine mount shim
I posted this a while ago but didn't get any response...as I get closer to the body drop I want to make sure I do not have a problem as any problem will be much easier to deal with, with the body off. I have the trans in and it seems to be ok. I have not yet installed the drive shaft...thanks....
earlier post:
"I got the engine in last night but it didn't happen without a little bit of an issue. I had to shim the passengerside motor mount inorder to get the bolt through. Should this be a concern? I used a "V" type shim that I guess was used on 427's with a/c. the hole was only off by about 1/16 or 1/8. I am guess in the mounts might have been off but I wanted to check with the "minds" and make sure I am not overlooking a bigger issue before I bolt up the trans...Thanks...Jim"
earlier post:
"I got the engine in last night but it didn't happen without a little bit of an issue. I had to shim the passengerside motor mount inorder to get the bolt through. Should this be a concern? I used a "V" type shim that I guess was used on 427's with a/c. the hole was only off by about 1/16 or 1/8. I am guess in the mounts might have been off but I wanted to check with the "minds" and make sure I am not overlooking a bigger issue before I bolt up the trans...Thanks...Jim"
Tech Contributor
Joined: May 2005
Posts: 15,575
Likes: 118
From: Conroe Texas
Jim I can't help with an answer, but from looking at your post I'm guessing:
1) You have a 63 through 67 corvette based on reference to passenger side motor mount.
2) Your engine is a 427, which implies maybe you have a 66-67
More details may help the forum know how to respond
1) You have a 63 through 67 corvette based on reference to passenger side motor mount.
2) Your engine is a 427, which implies maybe you have a 66-67
More details may help the forum know how to respond
Thread Starter
Racer
Joined: Jun 2006
Posts: 413
Likes: 3
From: Frankfort Illinois
more info
Sorry,...it is a 67 originally a 427/390...replaced with a 72 bb...the mounts that came off the old engine were pretty trashed and they were replaced with correct mounts for a 67...the blocks should be the same so I am not sure why I ran into this problem...maybe just the mount design??..thanks ..Jim
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
A shim to mount the engine should not be required. A 1/16" or 1/8" of misalignment to get the through bolt to align is well within the realm of using a drift pin to align the frame/mount. Ideally, that shouldn't be required either.
Either way, whether you drift the holes on location or used a shim of no more dimension than you describe, I wouldn't worry too much about it.
Are you using the pointed through bolts or hardware store blunt end bolts?
Either way, whether you drift the holes on location or used a shim of no more dimension than you describe, I wouldn't worry too much about it.
Are you using the pointed through bolts or hardware store blunt end bolts?
Thread Starter
Racer
Joined: Jun 2006
Posts: 413
Likes: 3
From: Frankfort Illinois
bolts
I believe the bolts have a little taper to the end...It has been a while since I installed the engine...April I think...anyways I was just concerned there might be a bigger issue..The only thing I could think of would be the engine mounts themselves...the frame is the same (powdercoated now) but the same...the block allbeit a different one should be the same..the only different factor I came up with is the mounts...time will tell I guess....just hope it all doesn't blow up once its together...Jim
Paid Senior Member
Joined: Jul 2006
Posts: 1,737
Likes: 35
From: OP KS
A/C Big Blocks require shim. Available at Corvette Central or ebay.
MOTOR MOUNT SHIM - 427 WITH AIR CONDITIONING - 1 REQUIRED
Mounts between engine block and motor mount to keep carb floats level.
http://www.ebay.com/itm/1966-1974-Co...#ht_1205wt_736
MOTOR MOUNT SHIM - 427 WITH AIR CONDITIONING - 1 REQUIRED
Mounts between engine block and motor mount to keep carb floats level.
http://www.ebay.com/itm/1966-1974-Co...#ht_1205wt_736
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Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
A/C Big Blocks require shim. Available at Corvette Central or ebay.
MOTOR MOUNT SHIM - 427 WITH AIR CONDITIONING - 1 REQUIRED
Mounts between engine block and motor mount to keep carb floats level.
http://www.ebay.com/itm/1966-1974-Co...#ht_1205wt_736
MOTOR MOUNT SHIM - 427 WITH AIR CONDITIONING - 1 REQUIRED
Mounts between engine block and motor mount to keep carb floats level.
http://www.ebay.com/itm/1966-1974-Co...#ht_1205wt_736
Drifting
Joined: Oct 2009
Posts: 1,939
Likes: 199
From: Palm Bay Florida
I have seen midyear big block cars with sagging front crossmembers when doing front end alignment this sounds like the same problem measure between upper control arm mounting flanges workshop manual does not have a spec. for this you have to measure another car.
Mark Napoli
Mark Napoli
Safety Car
Joined: Feb 2006
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Plus, the earth is round ( so I'm told ). So you are never driving on a flat surface.
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
I have seen midyear big block cars with sagging front crossmembers when doing front end alignment this sounds like the same problem measure between upper control arm mounting flanges workshop manual does not have a spec. for this you have to measure another car.
Mark Napoli
Mark Napoli
Team Owner
Joined: Oct 2000
Posts: 38,897
Likes: 1,925
From: Washington Michigan
