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DIY solid motor mounts - a different approach

 
Old Oct 28, 2005, 01:02 AM
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DIY solid motor mounts - a different approach

I don't know if we need another thread in How-to, so I'll just post this here.

This will make a set (front and rear) of VERY solid roll stopper motor mounts. If a bit of engine vibration transferred to the cabin would bother you, this is not a mod for you. If it wouldn't, and you want to get rid of the engine movement that contributes to wheel hop, then read on...

I picked up a set of new motor mounts, and some 2-part urethane mix to fill them with. I'll let the pictures do most of the talking, with only brief descriptions on each...

Front and rear roll stoppers, in stock form.



Cut out the center tube...



Cut the excess rubber off the center tube. A sharp knife helps.



A wire wheel takes the remaining rubber off the metal.



Then use a hacksaw and cut straight across the pressed-in metal insert...


Then use a chisel (or screwdriver) and hammer to peel up the corners...



That should allow you to remove the insert, leaving you with the mount frame.


Do the same on the front roll stopper, and you get this:


Sand the insides of the mount frames to give the urethane better adhesion...


Set the mount down on a flat surface, put the center tube into its approximate place, and start masking off with tape. I chose electrical tape because it's stretchy, your mileage may vary.


Mask one side off completely, leaving the other side open. Use a piece of tape that goes all the way around the piece to hold the center tube in place. Get the center tube as close to the original position as possible. This is important, because you won't be able to move it later. At the very least, get it square and level in there, and protruding from each side equally. Also make SURE you get a good tight fit around the center tube with the tape, or it will leak when you pour in the urethane.





Prime to allow even better adhesion. Let this stuff dry until it's no longer tacky.


Arrange the primed mounts on their side, open side up, suspended so the center tube hangs where it's supposed to. My vise was a handy spot to do so...


Urethane mix. Pour the smaller bottle into the can, and mix for two minutes. Scrape the sides of the can well, you'll need all of this can to fill both mounts.



Then transfer to the supplied plastic container, and mix for two more minutes.


Pour the urethane into the mounts, and let them cure for several hours before moving them.


After a couple days, they should be hard enough to install in the car.

EDIT: After only two hours, they had set up well enough that I could peel off the tape. I'm still going to let them cure a while before installing them in my car, but this is what they look like:


Larger versions of all these pics (even the really blurry one ) are available HERE

Enjoy! Mine will probably go in on Sunday, if I'm not out trick-or-treating.

Last edited by Myszkewicz; Sep 19, 2006 at 07:03 PM. Reason: Pic links fixed
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Old Oct 28, 2005, 08:39 AM
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A more thorough way to do it. Discuss here.

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Old Feb 8, 2007, 05:21 PM
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Just thought I should add that the urethane mix I used in this write-up turned out to be a bit too solid for me. Too much engine vibration was transmitted to the car, so I drilled out the 94 and replaced it with 75. I'm much happier with the 75.
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