Poly engine mount install feedback??
Poly engine mount install feedback?? I have my engine out right now and I'm thinking about installing some polyuerathane motor mounts when I put it back in. I'd just like to get some feedback from people that are running these as to how they compare to the stockers in terms of vibration, shaking? Car is cammed and I want to minimize vibration and noise as much as possible so I'm leaning towards running the stock mounts but I know the install is a PITA so I don't want to miss an opportunity for a relatively easy install when I put the motor back in.
So folks that switched to poly, any regrets? Anyone switch from poly to stock?
So folks that switched to poly, any regrets? Anyone switch from poly to stock?
I switched to poly to stop my exhuast from banging. I haven't had any negative side effects from it and l am completely happy with the swap. I now have NO exhaust problems due to engine movement. If you're running a cam I would recommend doing it since you will be placing alot more strain on the mounts.
Do the motor mount, leave the trans mount stock.
I can't feel the motor shake, but I can DEF feel the trans vibrate.
And the trans mount is cake, literally like 5 bolts to replace, the motor mounts are hard.
Do them while you have the easy shot.
I can't feel the motor shake, but I can DEF feel the trans vibrate.
And the trans mount is cake, literally like 5 bolts to replace, the motor mounts are hard.
Do them while you have the easy shot.
I just did a cam swap thru the engine drop method, definitelly do the engine mount now! The trans mount is what causes mos of your vibration usually. I would put a new stock trans mount on for now if your worried about vibration and see how it holds up.
everyday I walk past the box of poly motor mounts just sitting there on the table and they give me the stare-down. I really am not going to enjoy putting these on but sometimes I want to stop my car and rip off my ORY when I am driving. Sorry for the hijack....they help a lot, put um in.
They are definitely nice. Plus, when you "hand throttle" the engine, i.e. revving it from the engine bay by manually turning the throttle cam, people go "holy **** the engine pulls the whole damn car with it!"
Also, I have a poly trans mount as well and I noticed no extra vibration.......
Also, I have a poly trans mount as well and I noticed no extra vibration.......
If you've already got the engine out, you might as well upgrade. I bought some Prothane motor mounts which I planned on installing along with my AR headers, but everyone I talked to said there was no need to swap the mounts for the AR's. They were right. I still have the OEM motor mounts in my car and I have zero issues with vibration or Y pipe banging. I'll sell you my Prothane mounts cheap if you want them. PM me. I don't plan on pulling my motor and upgrading the mounts anytime soon, but I do think the PU mounts would be an improvement.
Last edited by hammerhead; Sep 18, 2007 at 09:26 PM.
Trending Topics
Banned
Joined: Mar 2007
Posts: 317
Likes: 0
I have polyurethane mounts for both the engine and trans on my car. I upgraded to poly engine mounts so that it would stop the exhaust banging, that pisses me off more than anything. When I pulled out the stock rubber motor mounts with 88,000 miles on them, there wasn't much left to the driver's side mount, totally shot.
However, now that I've driven with the poly mounts for while, you can definitely feel the increased vibration. You can feel it in the whole car while driving, especially in the shifter. If I had the chance to do it again though I would, I'd rather do poly mounts once and be done with it than do rubber mounts again. Not to mention the entire divetrain stays put, nothing will tear a car apart faster than a drivetrain that isn't securely mounted in the chassis.
However, now that I've driven with the poly mounts for while, you can definitely feel the increased vibration. You can feel it in the whole car while driving, especially in the shifter. If I had the chance to do it again though I would, I'd rather do poly mounts once and be done with it than do rubber mounts again. Not to mention the entire divetrain stays put, nothing will tear a car apart faster than a drivetrain that isn't securely mounted in the chassis.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
On The Tree
Joined: Jan 2004
Posts: 154
Likes: 0
From: south of H-ToWn Tx.
Poly motor mounts are the best bang for da' buck.The motor pulls the whole damm car now , stockers are junk ...Ive installed 2 diffrent poly trans mounts, vibration from HELL past 75mph.....I'll stick with the gm stocker trans mount...
...Ive installed 2 diffrent poly trans mounts, vibration from HELL past 75mph.....I'll stick with the gm stocker trans mount... 
They're not bad to do, I did mine when I did my headers, and they'll be cake for you to do with the engine out. My car has no extra vibrations from the Prothanes and I'm definitely glad I shelled out the whopping 50 something bucks for them.
Originally Posted by 95 Z28
They're not bad to do, I did mine when I did my headers, and they'll be cake for you to do with the engine out. My car has no extra vibrations from the Prothanes and I'm definitely glad I shelled out the whopping 50 something bucks for them.
I never even recall having a vibration.
Originally Posted by LSGunZ28
so youd rather break a trans mount than live with some minor vibrations?
I never even recall having a vibration.
I never even recall having a vibration.
