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#3379043 - 05/23/14 08:30 AM Re: Cheap DIY urethane motor mounts [Re: IndyIan]
Brule Offline


Registered: 11/12/12
Posts: 422
Loc: St. Louis, Mo
Good idea. When I had an mr2 spyder someone on spyderchat was selling home-made motor mounts...but these were more or less "puzzle pieces" that filled in the gaps of the original mounts.
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#3379065 - 05/23/14 08:52 AM Re: Cheap DIY urethane motor mounts [Re: asand1]
92saturnsl2 Offline


Registered: 03/02/04
Posts: 811
Loc: Colorado Springs, CO
I used to use Hockey pucks on some H-body GM 3800 V6 engines. Drill a hole through three hockey pucks, put a 6" grade 8 bolt through them and slap it in.

Best motor mount I've ever used, and longest lasting by far...
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#3379220 - 05/23/14 11:58 AM Re: Cheap DIY urethane motor mounts [Re: asand1]
sleddriver Offline


Registered: 02/06/10
Posts: 2196
Loc: Central Texas
Inventive! Cheers Cheers2

Coos Bay is beautiful.
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#3379721 - 05/24/14 12:08 AM Re: Cheap DIY urethane motor mounts [Re: asand1]
dailydriver Offline


Registered: 03/14/06
Posts: 7604
Loc: Bucks County, Pa.
COOL! thumbsup

But these cannot be as rigid as either Prothane's or Energy Suspension's aftermarket mounts (IF that is what one wants), correct? shrug
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#3379726 - 05/24/14 12:23 AM Re: Cheap DIY urethane motor mounts [Re: dailydriver]
asand1 Offline


Registered: 12/16/12
Posts: 1163
Loc: Oregon coast
Originally Posted By: dailydriver
COOL! thumbsup

But these cannot be as rigid as either Prothane's or Energy Suspension's aftermarket mounts (IF that is what one wants), correct? shrug


Correct, they are somewhere between stock and ES/Prothane but definitely on the stiffer side. After driving to work I can say I am very happy with them as long as they hold up.
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#3379815 - 05/24/14 07:26 AM Re: Cheap DIY urethane motor mounts [Re: asand1]
Kira Offline


Registered: 08/19/10
Posts: 1598
Loc: Champlain/Hudson Valley
And I didn't see a single post calling you cheap!

EXCELLENT JOB! Kira

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#3379822 - 05/24/14 07:38 AM Re: Cheap DIY urethane motor mounts [Re: asand1]
MarkM66 Offline


Registered: 10/19/10
Posts: 1288
Loc: stl
How long are these "filled" mounts lasting?

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#3379829 - 05/24/14 07:49 AM Re: Cheap DIY urethane motor mounts [Re: asand1]
asand1 Offline


Registered: 12/16/12
Posts: 1163
Loc: Oregon coast
Its been about 55 miles now, mostly highway. This is just one trip to work and back plus taking the girls to school once. Shifting feels so much better, no shudder. Leaving stops is nicer, I don't have to feather the clutch to avoid a big jolt when the engine rocks back.
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#3381338 - 05/26/14 07:33 AM Re: Cheap DIY urethane motor mounts [Re: asand1]
SteveSRT8 Online   content


Registered: 10/10/08
Posts: 16165
Loc: Sunny Florida
We used to do this with Neons at the strip. You could literally 'inject' the mount with high grade silicone or urethane and fix it right on the spot, well in 8 hours or so.

Only downside is a bit more vibe than a factory mount, but on many FWD vehicles this really helps the shifting of a manual trans....
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#3381346 - 05/26/14 07:56 AM Re: Cheap DIY urethane motor mounts [Re: Kira]
spasm3 Offline


Registered: 05/30/10
Posts: 4847
Loc: out there
Originally Posted By: Kira
And I didn't see a single post calling you cheap!

EXCELLENT JOB! Kira


Ingenious!!
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#3381354 - 05/26/14 08:13 AM Re: Cheap DIY urethane motor mounts [Re: asand1]
sciphi Offline


Registered: 03/24/07
Posts: 8945
Loc: Upstate NY
Good job!

Having done the Windo-Weld mount on a previous car, that was insane the level of vibration it transmitted. As in, vibrate the car like a bass drum. I wouldn't put up with it for a daily driver anymore. Good to hear that this stuff works, and is nowhere near as stiff.
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#3384555 - 05/30/14 01:08 AM Re: Cheap DIY urethane motor mounts [Re: asand1]
asand1 Offline


Registered: 12/16/12
Posts: 1163
Loc: Oregon coast
I've done some research and found some info for different fillers, with comparative pricing.

The PL S40 I used is only Shore A 28-32, and $7.99 a tube.

3M Auto Glass Urethane Windshield Adhesive-Medium Viscosity,
PN 08693, Is Shore A 50-55 and about $15.00 a tube.


3M Windo-Weld Super Fast Urethane, PN 08609, is Shore A 55-60 and $26.00 a tube.

I think 3M 08693 is the winner, and will go in my old mounts soon.
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#3384650 - 05/30/14 07:18 AM Re: Cheap DIY urethane motor mounts [Re: asand1]
javacontour Offline


Registered: 06/26/03
Posts: 8111
Loc: Illinois
I'm getting ready to do this with my Protege5. A good quality passenger side engine mount is close to $200 for the manual transaxle cars. I'm getting ready to take a weekend away. I may remove the mount and fill it with the fast curing windshield adhesive that supposedly will set in about 48 hours.

I'm glad you posted this. The jig is a good idea that I will adopt for my work.

Stay tuned over the next few weeks.
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#3384655 - 05/30/14 07:26 AM Re: Cheap DIY urethane motor mounts [Re: asand1]
javacontour Offline


Registered: 06/26/03
Posts: 8111
Loc: Illinois
You can get 3M Windo-Weld Super Fast Urethane, PN 08609 on Amazon for under $19. oilBabe has Prime, so we'll see if I can get a tube shipped free.
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#3384666 - 05/30/14 07:44 AM Re: Cheap DIY urethane motor mounts [Re: javacontour]
IndyIan Offline


Registered: 09/23/08
Posts: 6259
Loc: Ontario, Canada
Is the mount fluid filled? I guess you have very little to lose by trying a filled/solid mount but I think you'll find it too buzzy for a DD.
Some companies make urethane inserts to fill the holes in the OEM mount, I wonder if putting in an insert and then drill holes into it to soften it until you like it, would work?
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