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Poly motor mount.... good or bad idea? #4451281
07/06/17 12:00 PM
07/06/17 12:00 PM
Joined: Jan 2017
Posts: 490
Virginia
Hemispheres Offline OP
Hemispheres  Offline OP
Joined: Jan 2017
Posts: 490
Virginia
I've managed to crack my stock liquid filled motor mount by repeatedly launching at 2.5k rpms and all around driving like an idiot.

I couldn't help it, I raced one person in my Buick and shortly thereafter I had random people pulling up next to me on the interstate/highways wanting to race. Balls to the wall or none at all. laugh

Anywho, A few months back I found a puddle of fluid under the car whilst dropping some metal off at the local scrapyard. Figured it was my power steering pump/hose. Going back about a month I noticed a clunk when shifting from P to R, and after hearing the clunk giving it gas results in a feeling of "shudder". Combine that with the fact that the car can't decide when it wants to shift under partial/half throttle and I have all the classic symptoms of a bad motor mount.

This is double the cost, but also geared towards performance and durability, I'm just wondering if the excess vibration would be worth it.

https://zzperformance.com/3800/poly-engine-mount.html


2009 Buick LaCrosse (3800 Series III) - 137,000 miles.
PZ Plat HM/Mobil 1 HM
Bosch/Purolator/Mobil filters
Re: Poly motor mount.... good or bad idea? [Re: Hemispheres] #4451282
07/06/17 12:01 PM
07/06/17 12:01 PM
Joined: Dec 2005
Posts: 10,331
Upper Midwest
kschachn Offline
kschachn  Offline
Joined: Dec 2005
Posts: 10,331
Upper Midwest
Cool. If you're "driving like an idiot" as you say, it won't be long before you break something else.

laugh

Originally Posted By: Hemispheres
I've managed to crack my stock liquid filled motor mount by repeatedly launching at 2.5k rpms and all around driving like an idiot.

I couldn't help it, I raced one person in my Buick and shortly thereafter I had random people pulling up next to me on the interstate/highways wanting to race. Balls to the wall or none at all. laugh

Anywho, A few months back I found a puddle of fluid under the car whilst dropping some metal off at the local scrapyard. Figured it was my power steering pump/hose. Going back about a month I noticed a clunk when shifting from P to R, and after hearing the clunk giving it gas results in a feeling of "shudder". Combine that with the fact that the car can't decide when it wants to shift under partial/half throttle and I have all the classic symptoms of a bad motor mount.

This is double the cost, but also geared towards performance and durability, I'm just wondering if the excess vibration would be worth it.

https://zzperformance.com/3800/poly-engine-mount.html


1994 BMW 530i, 238K
1996 Honda Accord, 266K
1999 Toyota Sienna, 407K
2000 Toyota ECHO, 280K
Re: Poly motor mount.... good or bad idea? [Re: Hemispheres] #4451289
07/06/17 12:05 PM
07/06/17 12:05 PM
Joined: Jun 2003
Posts: 5,951
Illinois
SHOZ Offline
SHOZ  Offline
Joined: Jun 2003
Posts: 5,951
Illinois
I use some sort of restrainer for engine movement. On my FWD V8 Taurus it was a chain from the front exhaust manifold to the subframe. On my RWD Gen Coupe it is a piece of cable attached to the head and anchored at the drivers side strut tower.

Never had to change a motor mount.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Poly motor mount.... good or bad idea? [Re: Hemispheres] #4451300
07/06/17 12:15 PM
07/06/17 12:15 PM
Joined: Dec 2006
Posts: 1,462
Michigan
MrHorspwer Offline
MrHorspwer  Offline
Joined: Dec 2006
Posts: 1,462
Michigan
Yes, poly mounts (engine and trans) are a worthwhile upgrade in a W-body if you're making more power than stock or find yourself chewing up OE mounts.

Re: Poly motor mount.... good or bad idea? [Re: Hemispheres] #4451321
07/06/17 12:31 PM
07/06/17 12:31 PM
Joined: Nov 2016
Posts: 183
PA
MarcS Offline
MarcS  Offline
Joined: Nov 2016
Posts: 183
PA
I used to have a Regal GS that I sold before redoing the lower motor and trans mounts. I think i have a set of solid rubber ones for a GTP in my garage. I got those because they don't leak like the liquid filled mounts and don't make the engine vibrations as bad as poly. If you want them, shoot me a PM and I'll look for them. I'd also recommend flipping your upper motor mounts. free mod that reduces a lot of the movement.

Re: Poly motor mount.... good or bad idea? [Re: Hemispheres] #4451352
07/06/17 12:57 PM
07/06/17 12:57 PM
Joined: Sep 2008
Posts: 9,235
Ontario, Canada
IndyIan Offline
IndyIan  Offline
Joined: Sep 2008
Posts: 9,235
Ontario, Canada
I have a "soft" poly torque mount in the Focus. In my car there are two upper mounts on each side of the motor/trans and lower torque mount that keeps the engine from twisting. By just restricting the twist motion its pretty much stopped wheelhop, and under light throttle there is nearly zero extra NVH. If you DD your car you might want to try the torque mount first.


07 Focus ZXW, 5spd manual, 218km M1 5W30
18 Outback 2.5 CVT 15km 0W20
Re: Poly motor mount.... good or bad idea? [Re: MarcS] #4451375
07/06/17 01:17 PM
07/06/17 01:17 PM
Joined: Jan 2017
Posts: 490
Virginia
Hemispheres Offline OP
Hemispheres  Offline OP
Joined: Jan 2017
Posts: 490
Virginia
Originally Posted By: MarcS
I used to have a Regal GS that I sold before redoing the lower motor and trans mounts. I think i have a set of solid rubber ones for a GTP in my garage. I got those because they don't leak like the liquid filled mounts and don't make the engine vibrations as bad as poly. If you want them, shoot me a PM and I'll look for them. I'd also recommend flipping your upper motor mounts. free mod that reduces a lot of the movement.


I've already flipped the rubber bushings on the dogbone mounts, first thing I did before actually spending money on performance parts. If I decide to the solid route I'll shoot you a PM, I'm just liking the idea of little to no engine movement the poly's offer.


2009 Buick LaCrosse (3800 Series III) - 137,000 miles.
PZ Plat HM/Mobil 1 HM
Bosch/Purolator/Mobil filters
Re: Poly motor mount.... good or bad idea? [Re: Hemispheres] #4451380
07/06/17 01:20 PM
07/06/17 01:20 PM
Joined: Sep 2004
Posts: 2,427
snowblind in TX
punisher Offline
punisher  Offline
Joined: Sep 2004
Posts: 2,427
snowblind in TX
Is using a simple piece of chain between block and frame/subframe too ghetto now?

Re: Poly motor mount.... good or bad idea? [Re: punisher] #4451382
07/06/17 01:23 PM
07/06/17 01:23 PM
Joined: Jun 2003
Posts: 5,951
Illinois
SHOZ Offline
SHOZ  Offline
Joined: Jun 2003
Posts: 5,951
Illinois
Originally Posted By: punisher
Is using a simple piece of chain between block and frame/subframe too ghetto now?
I had to use shiny imported 316 SS chain to keep the naysayers quiet.......


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Poly motor mount.... good or bad idea? [Re: Hemispheres] #4451384
07/06/17 01:25 PM
07/06/17 01:25 PM
Joined: Nov 2006
Posts: 20,594
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,594
MA, Mittelfranken.de
I have both the engine and trans mount in ply in a GTP 3800, it also liked to tear engine mounts apart. They work well but they do vibrate noticeably but so does my engine with no balance shaft (double roller chain installed) so how much is just from the mounts I don't know.


ASE L1, Master. Deutsch Meisterbrief.
Re: Poly motor mount.... good or bad idea? [Re: punisher] #4451387
07/06/17 01:29 PM
07/06/17 01:29 PM
Joined: Jan 2017
Posts: 490
Virginia
Hemispheres Offline OP
Hemispheres  Offline OP
Joined: Jan 2017
Posts: 490
Virginia
Originally Posted By: punisher
Is using a simple piece of chain between block and frame/subframe too ghetto now?


It isn't a matter of ghetto to me, it's a matter of doing it right. I don't feel comfortable with a chain putting all that extra strain on my exhaust studs and I rather like the finish of my tubular exhaust manifolds.


2009 Buick LaCrosse (3800 Series III) - 137,000 miles.
PZ Plat HM/Mobil 1 HM
Bosch/Purolator/Mobil filters
Re: Poly motor mount.... good or bad idea? [Re: Hemispheres] #4451410
07/06/17 01:47 PM
07/06/17 01:47 PM
Joined: Aug 2015
Posts: 204
Colorado
AntsinmyEyes Offline
AntsinmyEyes  Offline
Joined: Aug 2015
Posts: 204
Colorado
Have poly motor mounts on my rx7. I notice aome minor vibrations at lower rpms but they go away as you go through the rpm range. Also i can do burnouts now without my car hopping around. Been pretty sweet id say


1987 mazda rx7
2004 mazda rx8
1995 miata
2005 dodge ram
Re: Poly motor mount.... good or bad idea? [Re: Hemispheres] #4451438
07/06/17 02:16 PM
07/06/17 02:16 PM
Joined: Jun 2015
Posts: 696
Arizona
Kawiguy454 Offline
Kawiguy454  Offline
Joined: Jun 2015
Posts: 696
Arizona
Back in the day I used steel solid mounts on my 454 Chevy vette and no chains needed. Yes it transmitted its beastly musical vibrations to the frame but that was part of the fun. I would not hesitaTE ON THE pOLYS

Re: Poly motor mount.... good or bad idea? [Re: Hemispheres] #4451454
07/06/17 02:35 PM
07/06/17 02:35 PM
Joined: Feb 2014
Posts: 2,606
Canada
Lolvoguy Offline
Lolvoguy  Offline
Joined: Feb 2014
Posts: 2,606
Canada
Originally Posted By: Hemispheres

Balls to the wall or none at all. laugh


I like this. Never heard this before.

I'm going to use this if you don't mind


06 Lexus IS350- Wife
88 BMW 325is- Mistress
Say "no" to Turbo!
Re: Poly motor mount.... good or bad idea? [Re: Lolvoguy] #4451574
07/06/17 04:52 PM
07/06/17 04:52 PM
Joined: Apr 2010
Posts: 184
Michigan
jkasch Offline
jkasch  Offline
Joined: Apr 2010
Posts: 184
Michigan
Originally Posted By: Lolvoguy
Originally Posted By: Hemispheres

Balls to the wall or none at all. laugh


I like this. Never heard this before.

I'm going to use this if you don't mind


If you're not being facetious (maybe it isn't common in Canada), it's an aviator term for having all the ball-topped controls all the way forward for maximum speed. For years, I thought it referred to male anatomy. duh Doesn't make much sense in that regard.


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