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Rebuilding motor mounts with urethane


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8 replies to this topic

#1 Marck

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Posted 05 March 2005 - 04:36 PM

I have some 3M window weld (poly urethane) and caulking gun here and my engine is sitting out in my driveway. I thought I would inspect the old motor mounts to see what I would find and possibly rebuild them with urethane.

One of the motor mounts still looks good, while the other came off in two pieces and looked like charcoal (it was involved in an engine fire back in 2002). I am using the following website for guidance:
http://importnut.net/motormount.htm

My question is, should I remove the rest of the charcoaled rubber off before filling it with urethane? Also about the other good engine mount, do I leave it alone and reuse it or should I remove all or some of the rubber and refill with urethane? Would it be bad to have one side with a urethane mount and the other stock (made with softer rubber)?

My other options are to buy a new engine mount to replace the bad one and reuse the second good one or to buy two new engine mounts.

#2 Handtool

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Posted 05 March 2005 - 07:54 PM

I'd did the 3M windoweld treatment to my motor mounts about 3 years ago. Never again. I let them cure for 3 days and then put everything back together. The heat from the y-pipe melted all the windoweld out after the first day of driving. What a mess. I ended up just getting some good junkyard motor mounts. If your going to do it make sure you let that stuff cure. Good luck.

#3 Marck

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Posted 05 March 2005 - 09:14 PM

3 days should have been plenty of time to let them cure. Maybe I should just not bother with it then and buy one new motor mount. Is there anybody who had good results making the homemade motor mounts?

#4 breaffyaviation

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Posted 05 March 2005 - 10:31 PM

I believe I have a good set of mounts laying around for an 86 wagon with an Ea 82 .Send a P M if you need them and Ill go check.

Jude

#5 Marck

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Posted 05 March 2005 - 10:48 PM

I believe I have a good set of mounts laying around for an 86 wagon with an Ea 82 .Send a P M if you need them and Ill go check.

Jude


I just need one good motor mount for the right side if you got it.

#6 archemitis

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Posted 05 March 2005 - 11:01 PM

i've had huge success with welding plates between the two pieces of metal, and making them solid.

#7 VaporTrail

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Posted 06 March 2005 - 12:21 AM

I'd did the 3M windoweld treatment to my motor mounts about 3 years ago. Never again. I let them cure for 3 days and then put everything back together. The heat from the y-pipe melted all the windoweld out after the first day of driving. What a mess. I ended up just getting some good junkyard motor mounts. If your going to do it make sure you let that stuff cure. Good luck.


I did my motor and tranny mounts, and let them cure for about 7 days before installing. have had them in almost a year now with no problems....

just a lot of vibration..... :grin:

#8 subiemech85

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Posted 06 March 2005 - 12:27 AM

I did 2

the driver side mount I burned off ALL of the old rubber, cleaned up the metal, drilled many 1/8" holes, and filled it in

the other one I just added to

let set for a week, and install

still no problems

#9 Ross

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Posted 06 March 2005 - 12:59 AM

i've had huge success with welding plates between the two pieces of metal, and making them solid.


You're joking, right?




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