I'm replacing the motor in a '93 with 130K miles on the body. Should I change the motor mounts? If so, should I go with some stock replacements or polyurethane ones? The car is an A4 right now. May convert to an M6 later on depending on how things go.
Let me know what you think.
Thanks.

 

mine as well do it while you're in there! chances are the originals are worn out! do poly mount on one side and stock rubber type on the other, that will give you good rigidity with out rattling your teeth out

 

I just did the poly's about 2 weeks ago and there great. Nice and stiff, but by no means as bad as peolpe make them out to be. I have 92K on my car and the stock rubber ones were pretty saggy! Its a good insurance policy for $50, especially if you plan on putting headers on. My flanges rubbed due to the sagging mounts. Do it while its nice and easy, don't wait until the motor is in and then go back because they aren't the most accesible piece on the car!

 

I wanna go the One OEM and the other Poly mounts way... on what side does the Poly mount goes?

Mental one

 

If you are set on only doing one poly I would put it on the passenger side (you know how when you rev it the engine rocks to that side). But i just did poly motor mounts on both last nite and on the test drive I really could not tell that much of a difference, maybe a little bit more vibration when I came to a stop sign (but an improvemnt over have my passenger side header flange hit the k-member). And yes do motor mounts with the motor out, they will be off anyway. I succesfully did mine with my headers on but it was a pain in the a.........

 

I would strongly recommend putting urethanes on both sides. I did early this summer to prevent the driver's side header (FLP)from coming up into the floor under acclereration. I was concerned that they might introduce additional vibration, but to my surpise, I detected no additonal vibration over the stock ones. At 60K miles the stock ones were pretty well spent, too.

I used Energy Suspension urenthane mounts, and I haven't had the header hit yet, either. I'd recommend to anyone considering FLP headers, to order urethane mounts for the motor at the same time...the stock rubber ones allow the motor to move too much, resulting in header-to-chassis contact.

-Chris

 

96zride do you still have the part numbers???


Marvin

 

using energy suispesion poly mounts on my 383 heads & cam car with not a problem here

 

Summit Racing part Numbers:
ENS-3-1116G
ENS-3-1127G

-Chris

 

from my experience with all the other bushings and mounts I have replaced on my car, I would go with ES ones. When this motor comes out, ES Motor mounts will definately be going in.