Solid Motor Mounts

[Gtsjeg04]

I decided that since the motor mount inserts for my car suck and no one makes a solid mount, that I would figure out how to do it my self. After some minimal google searching I found what I was looking for. I found a flexible urethane casting compound for about 40 bucks shipped from McMaster-Carr.com P/N 8644k18. Its a two part mix and takes two days to fully cure. There is a urethane that is harder but I decided to go with the 3120psi.

So first you need to get a mount that you dont like and want to make better. Like this one.
http://i270.photobucket.com/albums/jj120/goodickje/P1010253.jpg

Next you need to source a combustible substance. I used some 87 octane gasoline I had laying around.
http://i270.photobucket.com/albums/jj120/goodickje/P1010254.jpg

Next I poured the gas on to the mounts rubber isolator that I set on top of some foil as to not stain the concrete so my ol' lady wouldnt yell at me.
http://i270.photobucket.com/albums/jj120/goodickje/P1010255.jpg

Next you need to light that **** on fire. You want to burn the rubber part till it flakes out. This might take a little time, just make sure the flame doesnt die.
http://i270.photobucket.com/albums/jj120/goodickje/P1010256.jpg
http://i270.photobucket.com/albums/jj120/goodickje/P1010257.jpg
http://i270.photobucket.com/albums/jj120/goodickje/P1010258.jpg

Now that the rubber isolator has been burnt out you can just sand out what ever residue is left.

Once you have it all cleaned out you would want to tape off one side of the mount so you can fill it. If you want to make cool shapes or designs have at it. This mount is behind the motor so no one will see it so simple is going to lead the way on this one.
http://i270.photobucket.com/albums/jj120/goodickje/P1010259.jpg
http://i270.photobucket.com/albums/jj120/goodickje/P1010260.jpg


Set up your mount so that when its filled it will be level.

Now you want to mix your two part urethane according to the sheet that came with it or a little hotter if you work fast. I like it a little hotter so I mixed accordingly.
http://i270.photobucket.com/albums/jj120/goodickje/P1010261.jpg

With everything mixed and set level its time to pour us a motor mount. I like to pour in steps to make sure there arent any large air bubbles.
http://i270.photobucket.com/albums/jj120/goodickje/P1010262.jpg
http://i270.photobucket.com/albums/jj120/goodickje/P1010263.jpg

When you are finishing your pour make sure you pour till the urethane rounds up at the top. This will give the air bubbles a place to go and can be cut off once the urethane cures for a professional look.

NOW, we wait. 48 hrs cure time.

See you in two days so we can finish this project up.

[yakboyslim]

Interested how well yours works out. I've seen this done a million times and it is either great, or the poly never sets right. No one usually posts p/n's so I can't figure out what works and what doesn't.

The inserts are fine for my Celi, but my other car will be getting a set of these when the time comes.

[bionictony]

nice. hope it doesn't vibrate too much. i put silicone goo in my old motor mount on my civic. i just filled in the hole areas.

[Blue Bomber]

I've used that polyurethane mix before. It's great, cures completely even and solid. It's super thin, even though it pours like syrup, so you need to be absolutely sure you seal off every little hole, or it will leak through. It also sticks to clothes for all of eternity. ;)

As far as prepping the mount, I believe you can chisel out the sleeve that the stock rubber is bonded to. You'll see the separation in metal rings if you look closely. Bend the inner ring back enough, and you can put a big screwdriver through the gap and separate the rubber part enough from the rest of the mount that it will just fall out. Much cleaner, though more elbow grease involved. You'll still have to clean off the center piece to reuse, but a grinder makes short work of that.

Just a note, but this stuff will not stick to the rubber if you want to just fill what's there. It may look like it has, but the difference in flexibility between the two materials (and how old and greasy the rubber is) will split the two apart. You'll be better off using 3M Window Weld and a thoroughly degreased mount instead.

[Boosted2.0]

Yeah - we tried adding this stuff to the stock mounts back in the day and it always squeezes back out.

[zzt231 gr]

Good luck and post results!!!

[Shizuma]

Looks great, why didn't you go ahead and place the mount for the bolt in the middle of the mount first before you poured? Just put it in the middle of the mount, tack it to the mount with a piece of thin metal, seal up either end and pour around it.

[Boosted2.0]

Looks great, why didn't you go ahead and place the mount for the bolt in the middle of the mount first before you poured? Just put it in the middle of the mount, tack it to the mount with a piece of thin metal, seal up either end and pour around it.

I was wondering that myself, but I figured I would wait and see how he handles it once its cured.

[Gtsjeg04]

Looks great, why didn't you go ahead and place the mount for the bolt in the middle of the mount first before you poured? Just put it in the middle of the mount, tack it to the mount with a piece of thin metal, seal up either end and pour around it.

I was going to do that but my welder had to be sent off for repair and to be honest drilling a hole and pressing in a bushing is just as big of a hassle.

[Shizuma]

I was going to do that but my welder had to be sent off for repair and to be honest drilling a hole and pressing in a bushing is just as big of a hassle.

Ah, well if you have no welder I guess you can't weld :gap:.

[Gts*Jason]

http://i270.photobucket.com/albums/jj120/goodickje/P1010276.jpg

http://i270.photobucket.com/albums/jj120/goodickje/P1010277.jpg

I think it came out alright but only some road time will tell. Let you guys know in a couple of weeks how it holds up.

[trdmsprts27]

looks good

C-ONE makes solids motor mounts but there not cheap lol

[zzt231 gr]

Yeah,they look almost OEM!Good job!

[Gts*Jason]

FYI, Do not use the compound I listed above. It has great tension qualities and very very poor compression qualities. The weight and the rock back of the motor caused the sleeve to smash down to the bottom of mount.

[yakboyslim]

That sucks to hear.

[Celicasaur]

I have to ask....can you describe the moments as you were driving when this happened? If that happened to me I probably would have panicked and cried, then hit lift all the way home :o:

[kortik]

Jason so what are you using now? or did you go back to stock?
do you recommend using harder urethane compound?

[Gts*Jason]

I havent messed with this stuff in a while, I just went back to the ES inserts

[kortik]

http://newcelica.org/forums/showthread.php?t=206814

filled them in