BBC Motor Mount Question - Team Camaro Tech
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post #1 of 13 (permalink) Old Aug 25th, 18, 03:20 AM Thread Starter
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BBC Motor Mount Question

One thing I noticed when I bought this car was these Rocker Arm spherical washers that someone put in between the block and the motor mount, with the intent I assume to raise the engine up about 1/4". With everything together it would be a pain to get them out. But now since I'm in the process of putting the heads back on and the tranny is out, should I go ahead and get those out of there? Put the correct engine mount bolts back in there?

Brett.....






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post #2 of 13 (permalink) Old Aug 25th, 18, 03:32 AM
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Re: BBC Motor Mount Question

No time like the present. I'd fix that if it were me.

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post #3 of 13 (permalink) Old Aug 25th, 18, 04:16 AM
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Re: BBC Motor Mount Question

Brett, before you take them out, check the clearance between your headers and the steering gear box on the drivers side of the engine compartment. It is not uncommon to "shim" the drivers side motor mount to gain clearance between the header tubes and the steering box. I have mine shimmed up 1/4" for that exact reason. It will not hurt anything and is virtually undetectable. FYI.
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post #4 of 13 (permalink) Old Aug 25th, 18, 04:49 AM Thread Starter
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Re: BBC Motor Mount Question

Quote:
Originally Posted by Matt 69 View Post
Brett, before you take them out, check the clearance between your headers and the steering gear box on the drivers side of the engine compartment. It is not uncommon to "shim" the drivers side motor mount to gain clearance between the header tubes and the steering box. I have mine shimmed up 1/4" for that exact reason. It will not hurt anything and is virtually undetectable. FYI.
And I'm now thinking that it could be the reason that they were installed. My Hedman Hedders barely did fit, so you are correct that it might cause more of an interference issue. I will put the headers back up and evaluate. My main concern was now that I'm installing a Tremec TKO600, I don't want to risk a bad driveline or tranny alignment issue.

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post #5 of 13 (permalink) Old Aug 25th, 18, 05:31 AM
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Re: BBC Motor Mount Question

Take them out and use these if you need to shim

https://www.summitracing.com/parts/mor-62535

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post #6 of 13 (permalink) Old Aug 25th, 18, 05:41 AM Thread Starter
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Re: BBC Motor Mount Question

Quote:
Originally Posted by Vega$69 View Post
Take them out and use these if you need to shim

https://www.summitracing.com/parts/mor-62535

Attachment 220981
Great John, I will order them today along with the correct ARP bolts. I think the bolts I picked out on the Summit (HERE) site are long enough. Do you concur?

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post #7 of 13 (permalink) Old Aug 25th, 18, 06:28 AM
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Re: BBC Motor Mount Question

t also looks like you're missing the motor mount plate that goes between the mount and the block.

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post #8 of 13 (permalink) Old Aug 25th, 18, 06:31 AM
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Re: BBC Motor Mount Question

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Originally Posted by Brettallen59 View Post
Great John, I will order them today along with the correct ARP bolts. I think the bolts I picked out on the Summit (HERE) site are long enough. Do you concur?

Brett.....
Personally I would remove one of the existing bolts and verify the length required.

Thanks,

Jeff


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post #9 of 13 (permalink) Old Aug 25th, 18, 06:47 AM
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Re: BBC Motor Mount Question

Brett, I have the Energy Suspension motor mounts installed WITH the supplied backing plate that John listed and I STILL need to shim my motor mount for additional header clearance. That is what I had to do to get my headers to fit. It doesn't necessarily mean that you will need to do the same. FWIW, I have a TKO 600 installed that I purchased from SST along with their kit. Shimming my motor mount did not effect any of my drive line angles or create any problems with shifting or installation. Again, this is my experience with the above mentioned situation.

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post #10 of 13 (permalink) Old Aug 25th, 18, 08:44 AM
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Re: BBC Motor Mount Question

Quote:
Originally Posted by Vega$69 View Post
Take them out and use these if you need to shim

https://www.summitracing.com/parts/mor-62535

Attachment 220981
just asking a ?
what is the difference between the plates you show and what Brett has other than $$$$$
a 1/4" is a 1/4"
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post #11 of 13 (permalink) Old Aug 25th, 18, 10:09 AM
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Re: BBC Motor Mount Question

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Originally Posted by flat tire View Post
just asking a ?
what is the difference between the plates you show and what Brett has other than $$$$$
a 1/4" is a 1/4"
I think the shim plates spread the load more evenly on all three bolts but in reality functions probably the same.

And to me the plates look better. It only money. Haha

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post #12 of 13 (permalink) Old Aug 25th, 18, 01:38 PM Thread Starter
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Re: BBC Motor Mount Question

Kevin, John; You are both right. I need to pull the bolts because they appear to be grade 5 or less. Plus, I have no idea how much thread is in the block. I think I want to replace the bolts for more correct grade/length, and I think it will be easier to install the plates John found rather than trying to position three different washers individually. Maybe not? I do want it right, and since it's not a whole lot more, I can afford it. But I agree that it is not a critical necessity.

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post #13 of 13 (permalink) Old Aug 25th, 18, 02:41 PM Thread Starter
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Re: BBC Motor Mount Question

Quote:
Originally Posted by Chevy68 View Post
Personally I would remove one of the existing bolts and verify the length required.
Good Idea. I will do that to determine the max length needed.

Brett....

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