Polyurethane Filled Motor Mounts, V-V-I-I-B-B-R-R-A-A-T-I-O-N Options

[WannabeGT4]

There has been a gross understatement concerning the amount of vibration that is transfered to the cabin when using polyurethane motor mounts.

That is all.

[Dr_Tweak]

I recently took a customer for a ride in a 3SGTE swapped Celica, with the poly inserts. I personally feel that it's fine, I hardly notice a difference, but the vibration was such that it convinced him that he would never want a 3SGTE in his car, even though I reassured him that with stock mounts the vibration is not present.

So... yeah.

-Doc

This post has been edited by Dr_Tweak: Feb 10, 2007 - 12:41 AM

[jgreening]

Mine weren't bad at all. It depends on what is used.

[lagos]

i have the ones from kirk. i noticed some slight steering wheel vibration for the first few weeks after installing them as well as a few slight noises from the front bumper. most that stuff smoothed out after a few weeks of driving. besides that, its nothing horrible.

[Punisher]

i have the ones from kirk. i noticed some slight steering wheel vibration for the first few weeks after installing them as well as a few slight noises from the front bumper. most that stuff smoothed out after a few weeks of driving. besides that, its nothing horrible.

The vibration for me on the Kirk mounts isn't so bad once the engine/bay is all nice and warm.. but on a cold morning ... the vibration is horrible.. it's so annoying.. everything buzz's.. I'm only using rear mount inserts too... I bet if I just had the inserts on the front the vibration wouldn't be soo bad.. but I was trying to get the back of the motor to stop flopping around so the exhaust would stop smacking the rear cross member.

[malecrod]

^^^same here. Initially I installed both the front and rear kirk's inserts. The vibration was not all that bad while driving. But it was a little too much for me at idle (buzzing interior panels), so I took the front one off and left the rear one in. Now the vibration is very minimal, besides I can't really tell the difference btn using both inserts and just the rear inserts.

[x_itchy_b_x]

i like the vibrations lol. reminds me of a big mac truck.

[JesterDC]

^^^same here. Initially I installed both the front and rear kirk's inserts. The vibration was not all that bad while driving. But it was a little too much for me at idle (buzzing interior panels), so I took the front one off and left the rear one in. Now the vibration is very minimal, besides I can't really tell the difference btn using both inserts and just the rear inserts.

Wouldn't having only one insert on/in put more stress on the corresponding(front-back, left-right) stock mount? Just wondering if that's gonna cause problems...

[bindertch]

i have the ones from kirk. i noticed some slight steering wheel vibration for the first few weeks after installing them as well as a few slight noises from the front bumper. most that stuff smoothed out after a few weeks of driving. besides that, its nothing horrible.

The vibration for me on the Kirk mounts isn't so bad once the engine/bay is all nice and warm.. but on a cold morning ... the vibration is horrible.. it's so annoying.. everything buzz's.. I'm only using rear mount inserts too... I bet if I just had the inserts on the front the vibration wouldn't be soo bad.. but I was trying to get the back of the motor to stop flopping around so the exhaust would stop smacking the rear cross member.

^^^same here. Initially I installed both the front and rear kirk's inserts. The vibration was not all that bad while driving. But it was a little too much for me at idle (buzzing interior panels), so I took the front one off and left the rear one in. Now the vibration is very minimal, besides I can't really tell the difference btn using both inserts and just the rear inserts.

Wouldn't having only one insert on/in put more stress on the corresponding(front-back, left-right) stock mount? Just wondering if that's gonna cause problems...

Yes only having one mount that is polyurethane will put more stress on the other non poly mounts. It will likely wear the stock mount out faster. I would recommend evening it out or go to stock.

[lagos]

how do you figure that? the only thing that will kill a stock motor mount is the weight and rocking of the motor. having just one poly mount in there will still help reduce the rocking and stress on the other mount.

btw, poly mounts are almost a must on a swap. before i bought my inserts, i would go through the stock motor mounts about once a year. they just couldnt handle the weight and torque of the motor for long. the stock 3s even has a torque bar to help keep the motor from moving around too much, but it wont fit on our 6th gens.

This post has been edited by lagos: Feb 10, 2007 - 5:17 PM

[quicknstyle]

i have always wondered what about the people who use that 3m injection stuff on mounts to stiffen them up? anyone ever heard of this, tried it, etc?

[Punisher]

i have always wondered what about the people who use that 3m injection stuff on mounts to stiffen them up? anyone ever heard of this, tried it, etc?

I used it on my 5th gen GTS.. front and rear.. it worked really well.. they are still in good condition and it didn't add much vibration at all. The only way to do it and have it work well is to clean the mounts out real well.. the rubber n what not.. then layer the 3m window weld in .. shallow layers let them cure.. just keep stacking it.. Expect your car to be down for 2 days .. best to get spare mounts. But once it's done you'll never need to worry about mounts again.

[Jen]

This guy I know has solid aluminum mounts. Whenever I'm in his car, it's my own personal vibrator.

[easternpiro1]

yeah i have to agree that they are worrysome on cold mornings...i thought something was wrong with the car for the LONGEST! i was like GOD she dosent like cold mornings lol

This guy I know has solid aluminum mounts. Whenever I'm in his car, it's my own personal vibrator.

[bindertch]

how do you figure that? the only thing that will kill a stock motor mount is the weight and rocking of the motor. having just one poly mount in there will still help reduce the rocking and stress on the other mount.

Well stock both mounts would be taking up the motion. If you have one softer than the other then that one will be getting the most abuse.

[jgreening]

i have always wondered what about the people who use that 3m injection stuff on mounts to stiffen them up? anyone ever heard of this, tried it, etc?

I used it on my 5th gen GTS.. front and rear.. it worked really well.. they are still in good condition and it didn't add much vibration at all. The only way to do it and have it work well is to clean the mounts out real well.. the rubber n what not.. then layer the 3m window weld in .. shallow layers let them cure.. just keep stacking it.. Expect your car to be down for 2 days .. best to get spare mounts. But once it's done you'll never need to worry about mounts again.

I would not use window weld. Do a search on Celicatech. Chris D started a nice thread about the different options for materials for home made mounts. I used the liquid stuff mentioned in the thread - I forget the name of it right now and my mounts turned out great. I did not take the original rubber out but simply added the urethane to the existing mount. My theory for this was that I wanted a mount that had a shore hardness of about A75 to A80 and the material I purchased only came in A90. So, by leaving the stock rubber in there, I was able to effectively reduce the hardness of the entire mount. In my opinion, Kirk's inserts would save some time and hassel and you would probably never have to worry about them wearing. Most "home options" will wear at some point. However, it sounds like they are probably a little hard for most daily drivers.

This post has been edited by jgreening: Feb 11, 2007 - 2:51 PM

[phattyduck]

This guy I know has solid aluminum mounts. Whenever I'm in his car, it's my own personal vibrator.

Lol... for some reason, my GF like sitting in my WRX with the stiffer motor mounts while its idling...

I think the final word on this thread is: Everyone has a different tolerance for vibration on their cars. I personally find the increase in throttle and shifting control to be worth the increase in NVH.

-Charlie

[southwest2118]

ya'll send one of those girrr.....oh..oh..i mean ......i mean....mounts my way.

[CilverSeliST205]

Anyone wants me to make them brackets for adjustable ingalls damper (rsx version) ? is there any negatives to mounting a damper between strut top and alternator bracket? (kidna diagonal... should it be more front to back dampening or side to side?)

[playr158]

the motor will rock more front to back considering the way it is mounted..

you you might want to look into a radiator support to motor or firewall to motor type for direct motion or a angular might work as well