63 Fuel injection motor mounts

[Todd L.]

Hey guys,

Can anyone confirm which of the attached pictures of motor mounts I have would be correct for a 63 Fuel Injected car? I have part # 2142 which is painted black, and part # 330973 which is sandblasted and mounted on the frame/block. If either one of these is not correct, could someone please tell me what the correct part # is?

Thanks!
Todd

[Alan D.]

Re: 63 Fuel injection motor mounts

63 AIM notes 3796050, did not find any upgrades listed for L75 or L85

[Todd L.]

Re: 63 Fuel injection motor mounts

Thanks Alan, I appreciate your help!

[John D.]

Re: 63 Fuel injection motor mounts

Todd, I cannot accurately answer your question but to tell you this. Neither of your motor mounts are the ones that Chevy sold over the counter with a long list of applications. I have a NOSR #6258154 that does not look at all like yours. Just had it in my hands two days ago. Instruction sheets which are in bad shape say the years and different model of Chevys that it fits. Some with alterations.
Your mount are the earlier style.

[Joe L.]

Re: 63 Fuel injection motor mounts

Hey guys,

Can anyone confirm which of the attached pictures of motor mounts I have would be correct for a 63 Fuel Injected car? I have part # 2142 which is painted black, and part # 330973 which is sandblasted and mounted on the frame/block. If either one of these is not correct, could someone please tell me what the correct part # is?

Thanks!
Todd

Todd------


The 330973 is a GM locking style motor mount and the 2142 is an aftermarket locking style motor mount, probably an Anchor brand. Locking style mounts were not used on Corvettes until the 1970 model year. However, they have been GM SERVICE for 1963-69 since 1970.

The original mounts for your car are long since GM discontinued and will be virtually impossible to find in NOS form.

I recommend the use of the locking style mounts for all 1963-82 Corvettes, correct or not.

[Todd L.]

Re: 63 Fuel injection motor mounts

Thank you for the detail Joe. Do you feel the locking style, even if not the correct part #, will pass NCRS judging?

[Don H.]

Re: 63 Fuel injection motor mounts

Todd
depends what you mean by pass judging. Locking engine mounts are a service replacement part. They will take a deduct for Configuration and Date. 40% of possible originality points. So what are they worth? The second line of the Mechanical judging sheets says front engine mounts and ground strap. Five Originality points. If a judge were to break out the 5 points by say four for the engine mounts, and one for the ground strap, then 40% of four would be 1.6 Originality. A judge could deduct one for your later mounts, or at most two. Given this, do the locking mounts pass judging or not?

ps, I should have also considered the finish of the metal part. If the originals were bare natural steel, and your service replacement parts are say zinc plated, that would be a third aspect of the CDCIF matrix. Finish. So you could take a 60% Originality deduct. 60% of Four is 2.4. That would ensure a two point deduct.

[Joe L.]

Re: 63 Fuel injection motor mounts

Thank you for the detail Joe. Do you feel the locking style, even if not the correct part #, will pass NCRS judging?

Todd-----

It's just as Don describes.

My recommendation to use the locking style mounts is not based on NCRS "correctness". It's based on safety and damage prevention. If a non-locking style motor mount breaks, the engine can move up enough on one side to break other components like the fan, fan shroud, and hood. It's just not worth the risk for a judging point or two. GM did not go to the locking style mounts because the non-locking style worked just as well. They do work just as well, though, until the non-locking style breaks. If you plan on a "trailer queen"-only type car, then, by all means, use the non-locking style mounts.

It's more important now than ever. Most, if not all, of the non-locking style mounts available on the market are very cheap, foreign made parts. I would be far more concerned about them breaking than the old GM mounts.

[Todd L.]

Re: 63 Fuel injection motor mounts

Well... when I initially thought I was looking for a part #, I didn't realize I would get such wisdom and knowledge of something as simple as a motor mount part #. This is my first complete restoration of a Corvette, and first NCRS build, so I have much to learn. I really appreciate the perspective of everyone that has posted here, and I am grateful for your time in responding. I am excited to learn the history of these cars and honored to have the opportunity to restore a 63 split window. Thanks again for all the suggestions from everyone!

[John D.]

Re: 63 Fuel injection motor mounts

How do the reproduction motor mounts compare to the originals.

[Tom R.]

Re: 63 Fuel injection motor mounts

Joe

My recommendation to use the locking style mounts is not based on NCRS "correctness". It's based on safety and damage prevention.

It's more important now than ever. Most, if not all, of the non-locking style mounts available on the market are very cheap, foreign made parts. I would be far more concerned about them breaking than the old GM mounts.

What makes the locking-style engine mounts more safe? What's the functional aspect of a safety-style engine mount?

[David H.]

Re: 63 Fuel injection motor mounts

Joe

What makes the locking-style engine mounts more safe? What's the functional aspect of a safety-style engine mount?

Tom

Locking mounts have a "T" appendage that prevents catastrophic failure. See Below - Non-Locking & Locking Style.

Dave

Sorry, images did not transfer. Link below.


https://www.corvettecentral.com/c2-6...ounts-bolts%2f

[Todd L.]

Re: 63 Fuel injection motor mounts

Hey guys,

From my research, the attached photo is of a correct original motor mount (left unpainted) and a correct reproduction. I don't believe the CC part # is correct listed in the previous link.

Todd

[David H.]

Re: 63 Fuel injection motor mounts

... I don't believe the CC part # is correct listed in the previous link. ...Todd

Todd

Link was to an example of a LOCKING mount re Tom Russo's question.

Dave

[Joe L.]

Re: 63 Fuel injection motor mounts

Joe

What makes the locking-style engine mounts more safe? What's the functional aspect of a safety-style engine mount?

Tom-------


When a broken motor mount occurs and the engine "torques over" lots of bad things can happen. As I mentioned above, damage to the fan, fan shroud, and hood can occur. In addition, when these things occur, they can cause other bad things to occur, including the driver losing control of the car, at least momentarily.

GM went to the locking style mounts in 1970 for all models. Some 1969 models (although not Corvette) were recalled and fitted with a "cable-and-bracket" retrofit device to prevent engine "torque-over" if the non locking mounts failed. GM did not do this because engine mount failure caused only inconsequential problems.