Poly motor mount conversion. - Nova Tech
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  #1  
Old Mar 4th, 09, 11:32 PM
Philip Philip is offline
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Default Poly motor mount conversion.

In 73 GM changed to a new style mount on all models. It is a good design and addressed the safety short comings of previous designs.

The draw back is if you want to use polyurethane motor mounts only the insert is sold, the factory outer shell must be reused.

This procedure is for the 75 - 79 Novas all engines and the 73 - 74 small block and six cylinder Novas.

The 2 pieces of the mount are riveted together with a hollow rivet. Using a 13/32" drill bit the rivet was removed and the shell opened.





Next the parts were bead blasted, primed and painted.







The insert needs to placed into the shell with the lower (in this case also wider) of the ears towards the side with the wider spaced holes. It will go in the other way but the hole will not line up with the engine side bracket if backwards. Do one at a time and use the other as a guide.

I used the grease supplied for the suspension parts on the poly inserts where they contact the metal shell.



Then assembled the shell using bolts and nuts to hold it in place while the two halves were welded. The welding is not necessary but I think it makes the installation onto the frame easier.



When done they should be identical, there are no left and right.





If done correctly when the motor sits down on the mounts it will look like this



If the insert is backwards in the shell it will look like this when the motor is set in place.

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  #2  
Old Mar 5th, 09, 05:52 AM
poorman72 poorman72 is offline
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Default Re: Poly motor mount conversion.

Great information and pictures Philip. Thanks.Two
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Old Mar 5th, 09, 05:51 PM
Big Dave Big Dave is offline
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Default Re: Poly motor mount conversion.

Yah, you don't want to weld those bad boys with the inserts in backwards. The motor should rest on those steel tabs when installed.

Big Dave
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Old Mar 5th, 09, 08:18 PM
Cador Cador is offline
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Default Re: Poly motor mount conversion.

Nice write up and pics. This should go in the FAQ

When we get one, anyway
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Old Mar 5th, 09, 09:42 PM
Philip Philip is offline
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Default Re: Poly motor mount conversion.

Thanks, one step closer to getting it running.
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  #6  
Old Mar 6th, 09, 12:47 AM
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Default Re: Poly motor mount conversion.

i've already gotten the OK to copy/save it at the JollyRodder site... it won't get lost
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Old Sep 15th, 09, 12:34 AM
JAYARTER JAYARTER is offline
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Default Re: Poly motor mount conversion.

GOOD JOB...WHENS THAT NOVA GOING TO BE ON THE STREET
Probably sooner the BJ's Elcamino haha Still fighting the rear brake problem ( lack of) catch you later jay



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Old Sep 15th, 09, 12:43 AM
Philip Philip is offline
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Default Re: Poly motor mount conversion.

I am close Jay, real close. Waiting on interior right now, seats are at the upholsters. A little wiring to finish and then complete the brakes. I have the quick ratio steering gear cleaned and ready to reassemble and all new MOOG front end parts.
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