poly motor mounts
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
poly motor mounts im gettin headers and i heard getting these would keep the motor from moving so much and creating false knock from the headers....is this true and a worthy mod?? and how difficult is the install
On The Tree
Joined: Nov 2003
Posts: 131
Likes: 0
From: Orlando, FL usa
Well obviously you have to lift the engine out a little. Generally there is nothing to it but take your time. Might have to lossen stuff like exhaust. But one little note. I have been in several cars(including my own) that have poly mounts and they are very good, control torque well,are relatively stronger,look better, and resonably priced. Under no circumstance believe some that tells you they are smooth. They will cause extreme vibration,and generally make the car rough(espically motor mounts). That is because they are doing their job correctly. They are not used to quiet or make things smoother. They are used to control the high torque of modified motors where rubbers would be useless. When using anything poly, expect more noise, road noise, vibration,and shaking along with some discomfort while driving. If this does not bother you, then by all means get them, because they do work. 
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
yeah i have the poly tranny mount but im used to that now 
lol but about lifting the motor are you able to do that by the oil pan or no? like put a prece of wood under it to jack it up...and sites that have the install in detail, i wanna know what im getting into before i decide to get them...
lol but about lifting the motor are you able to do that by the oil pan or no? like put a prece of wood under it to jack it up...and sites that have the install in detail, i wanna know what im getting into before i decide to get them... 
TECH Fanatic
Joined: May 2002
Posts: 1,449
Likes: 0
From: jacksonville FL
I have poly motor mounts, I installed them to keep my Y-pipe from banging. They worked,hasnt banged since I put them in.The vibration is barley noticable to me, Its really not bad. I heard the poly trans mount was alot worse. Here's a tip, do them when your putting your headers on. take out the stock manafoilds, then do the motor mounts. This will save you alot of grief, belive me. I didnt put mine on untill after my long tubes were on. 
It was a HUGE pain in the ***. The headers come down right next to the motor mounts. It shouldnt be hard at all with the manafoilds out. O and I just used a floor jack to raise the engine just a little. It didnt take much at all you just dont want the weight of the motor on the mounts when you trying to take them out. Hope this helps.
,Justin
It was a HUGE pain in the ***. The headers come down right next to the motor mounts. It shouldnt be hard at all with the manafoilds out. O and I just used a floor jack to raise the engine just a little. It didnt take much at all you just dont want the weight of the motor on the mounts when you trying to take them out. Hope this helps.,Justin
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
i can do it at work, i work at an xpress lube and we ahve those pits where we go under the car, should make the header install and motor mounts easier right?
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
where can i order them from im having a hard time finding them. there was another post that asked that but i cant find it....although im sure after i post this i will lol
TECH Fanatic
Joined: May 2002
Posts: 1,449
Likes: 0
From: jacksonville FL
Originally Posted by WS6FirebirdTA00
where can i order them from im having a hard time finding them. there was another post that asked that but i cant find it....although im sure after i post this i will lol
Trending Topics
I know Thunder Racing and Spohn have them >>----->
Is this the post your talking about...?
https://ls1tech.com/forums/suspension-brakes/116223-who-carries-polyurethane-motor-mounts.html
Is this the post your talking about...?
https://ls1tech.com/forums/suspension-brakes/116223-who-carries-polyurethane-motor-mounts.html
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TECH Resident
Joined: Apr 2003
Posts: 791
Likes: 0
From: Tulsa, Ok
i put just one of them on my motor. i put it on the drivers side and left the factory rubber one on the passenger side. the mount keeps the motor very still. it almost dosn't torque over at all when you hit the throttle. it also kept my headers from hitting the k-member on hard launches on slicks. i really didn't notice any more vibrations, but my car shakes pretty bad all the time anyway, so i really couldn't tell you. i do know my motor dosn't shake anymore at idle 
TECH Resident
Joined: Aug 2003
Posts: 948
Likes: 0
From: orlando, florida
I got mine from thunder, great service. Also one thing I had to take mine back apart because i had the bolts going through the mount towards the motor and the tip of the bolt would hit the block when you try to bolt the mounts back on so make sure you insert the bolts with the head of the bolts towards the block. also make sure you have a grinder handy to grind the factory rivits off the mount that hold the clam shell together.
Originally Posted by MYTURBOT/A
I got mine from thunder, great service. Also one thing I had to take mine back apart because i had the bolts going through the mount towards the motor and the tip of the bolt would hit the block when you try to bolt the mounts back on so make sure you insert the bolts with the head of the bolts towards the block. also make sure you have a grinder handy to grind the factory rivits off the mount that hold the clam shell together.
Originally Posted by WILWAXU
Both good points. I did the same thing with the bolts
The thing about the bolt is in the instructions if you read them
J/K 
Ohh don`t get me started on the torqe arm bushing I just did mine last night. Lets just say next time i`ll drop the tranny to change it. 
I came up with all kinds of new cus words. 
This is something I used to put my mount in. It is a writeup a member of the board posted. Whoever you are...thanks
I only installed the drivers side. I did it while the headers were being done. No banging and I have some really close spots. Make sure you have a good drill. Drill press is even better.
http://www.humanoidms.com/misc.htm
I only installed the drivers side. I did it while the headers were being done. No banging and I have some really close spots. Make sure you have a good drill. Drill press is even better.
http://www.humanoidms.com/misc.htm
