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.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
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
Likes: 111
From: Tolland CT
