BB Engine Mount "V" Spacers
Thread Starter
Melting Slicks
Joined: Mar 2005
Posts: 2,838
Likes: 10
From: Austin TX
BB Engine Mount "V" Spacers
On one of my 73's (w/ 454), I'm curious about the "V" shaped spacers between the engine mounts (motor mounts) and the block. Obviously, they were needed to raise the engine a bit (3/16"?).
What is the reason for elevating the engine? Driveshaft angle? Fan-to-shroud clearance? Exhaust clearance? Other?
I'm told only BB's with A/C had these spacers installed at the factory. Can you confirm?
What is the reason for elevating the engine? Driveshaft angle? Fan-to-shroud clearance? Exhaust clearance? Other?
I'm told only BB's with A/C had these spacers installed at the factory. Can you confirm?
Le Mans Master
Joined: Nov 2006
Posts: 5,262
Likes: 283
From: I'd like to propose a toast... to internal combustion and wind in the face.
I don't know whether or not '72 big block a.c. cars were supposed to have them but I do know that mine does not and I don't have any drive shaft angle or fan to shroud clearance issues.
Thread Starter
Melting Slicks
Joined: Mar 2005
Posts: 2,838
Likes: 10
From: Austin TX
Le Mans Master
Joined: Nov 2006
Posts: 5,262
Likes: 283
From: I'd like to propose a toast... to internal combustion and wind in the face.
Yes it is. I do know for a fact the engine had been out of the car at one point before I owned it. I'd say someone just forgot them and when I had the engine out I never thought to re-install them. However, like I said before I haven't noticed any adverse effects that can be attributed to the absence of the shims.
Last edited by mudbone64; Aug 27, 2010 at 10:13 PM. Reason: I can't write sentences.
Pro
Joined: May 2009
Posts: 569
Likes: 2
From: Clio Mi
A little of topic but when i put a big block in my 1975 i didn't use the spacers, i used hooker super comp headers and my headers where dimpled to clearance the steering box, when i installed the headers they hit the steering box. i talked to a corvette shop here in michigan he said (did you put the v spacers behind the motor mounts?) i said huh? i have since installed them with no clearance problems on the headers.
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Thread Starter
Melting Slicks
Joined: Mar 2005
Posts: 2,838
Likes: 10
From: Austin TX
Heel & Toe
Joined: Apr 2000
Posts: 16
Likes: 1
From: Kentwood,MI. U.S.A.
Dark Blue,
When I bought my 68 in 1998 the car had not seen the road for 20yrs. The drivetrain is origonal, 427 - 400 with 4 speed. It does not have air cond or power steering. When i pulled the engine the shims were in place and looked like they had been there since the car left St. Louis. The only reason for the spacers I can think of is to slightly elevate the engine. I have learned over the years that I have owned this particular car is sometimes the books are not always correct.
When I bought my 68 in 1998 the car had not seen the road for 20yrs. The drivetrain is origonal, 427 - 400 with 4 speed. It does not have air cond or power steering. When i pulled the engine the shims were in place and looked like they had been there since the car left St. Louis. The only reason for the spacers I can think of is to slightly elevate the engine. I have learned over the years that I have owned this particular car is sometimes the books are not always correct.
Melting Slicks
Joined: Apr 2007
Posts: 3,189
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From: Tolland CT
