new motor mounts when installing LT's??
new motor mounts when installing LT's?? i just put a set of pacesetter LTs n ORY w/magnaflow catback on my 02 z28. i've read here and there about people also changing out the motor mounts to avoid vibrations against the floorplan but have yet to read anything consistent enough to see if this is something i need to do. so question is....do i need to change motor mounts? and if so what would you guys suggest?
Staging Lane
Joined: Jan 2008
Posts: 50
Likes: 0
From: South Side San Jose, CA
First of all, this should be in the external engine but o well. Alot of people do change them because, its alot easier to do with out the stock manifolds on or headers on. You don't have to change em but if you do it'll make sure your y pipe doesnt bang on the floor board.
yeah kinda new to the site and didn't see the external engine link below. will definately take a look nxt time...my bad.
ok so if i do go with new mounts..i was taking a look at spohn motor mounts, what is the difference btw poly and solid?
ok so if i do go with new mounts..i was taking a look at spohn motor mounts, what is the difference btw poly and solid?
First I'll say you probably should have posted this in the External Engine Section. Not a problem though, man.
Its correct when you are told the reason to install upgraded motor mounts is to prevent your new Y-pipe from banging on the floorpan from the increased torque flex of the factory rubber mounts.
But the other reason to do the mounts while doing headers is because the exhaust manifolds are off the car and out of the way. Leaving you with enough room to get to the motor mounts.
Attempting to remove and reinstall motor mounts while the headers are still in the car is a very difficult task. (****! Installing them with the exhaust out can be a bitch.)
My advice to you is, if your current exhaust isn't hitting the underside of your car, leave the factory motor mounts in there for now and wait for the next best opportunity to upgrade them.
If you are experiencing a banging Y-pipe, there are a few remedies out there, but the only real cure to fix this problem is to remove the headers/Y-pipe and upgrade your mounts to either Polys or Solids.
Wonderful news, isn't it. LOL
Its correct when you are told the reason to install upgraded motor mounts is to prevent your new Y-pipe from banging on the floorpan from the increased torque flex of the factory rubber mounts.
But the other reason to do the mounts while doing headers is because the exhaust manifolds are off the car and out of the way. Leaving you with enough room to get to the motor mounts.
Attempting to remove and reinstall motor mounts while the headers are still in the car is a very difficult task. (****! Installing them with the exhaust out can be a bitch.)
My advice to you is, if your current exhaust isn't hitting the underside of your car, leave the factory motor mounts in there for now and wait for the next best opportunity to upgrade them.
If you are experiencing a banging Y-pipe, there are a few remedies out there, but the only real cure to fix this problem is to remove the headers/Y-pipe and upgrade your mounts to either Polys or Solids.
Wonderful news, isn't it. LOL
well when i went to research the install i only saw one write up mention something about the mounts so that's why i didn't do them at the time of the exhaust install. but u live you learn...
looks like i will probably have to be changing them out soon then. any suggestions on motor mounts?
looks like i will probably have to be changing them out soon then. any suggestions on motor mounts?
Prothane Poly Motor Mounts. $50.00 from byunspeed. Here's a link...
http://www.byunspeed.com/product_inf...oducts_id=4924
http://www.byunspeed.com/product_inf...oducts_id=4924
Trending Topics
There is a great "how-to" write-up in the External Engine Section. Its what I used with the three sets of mounts I've helped install.
It's called something like, "Best Poly Motor Mount Write-up Ever Written".
Do a search and I'm sure you'll find it.
Good luck, dude!
It's called something like, "Best Poly Motor Mount Write-up Ever Written".
Do a search and I'm sure you'll find it.
Good luck, dude!
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: Sep 2007
Posts: 123
Likes: 0
When i did my LT's i didn't replace the mounts i got american racing headers and have not had one bang against the floor board. I think depending on your milage you may be ok with not doing them imo, i only had about 35,000 miles on mine at the time.
o ok..yeah i've heard ppl haven't been having as many problems with the new ones. mine has kinda quit but im' still just going to replace the mounts just to be on the safe side.
on a diff note though since i already have this thread started....has anyone had any problems with the msd wired touching the LT headers?
on a diff note though since i already have this thread started....has anyone had any problems with the msd wired touching the LT headers?
i just put a set of pacesetter LTs n ORY w/magnaflow catback on my 02 z28. i've read here and there about people also changing out the motor mounts to avoid vibrations against the floorplan but have yet to read anything consistent enough to see if this is something i need to do. so question is....do i need to change motor mounts? and if so what would you guys suggest?
yeah it's not doing it as bad since i went back and retightened all the clamps and bolts. but since i went ahead and already ordered them i'm going to go ahead and put them on n hopefully get rid of the vibration all together.
other than that i'm really happy with the exhaust, nice low tone until WOT
ha now just for a nice h/c combo
other than that i'm really happy with the exhaust, nice low tone until WOT
ha now just for a nice h/c combo 
o ok..yeah i've heard ppl haven't been having as many problems with the new ones. mine has kinda quit but im' still just going to replace the mounts just to be on the safe side.
on a diff note though since i already have this thread started....has anyone had any problems with the msd wired touching the LT headers?
on a diff note though since i already have this thread started....has anyone had any problems with the msd wired touching the LT headers?
and FWIW, read my addition near the end of the "best motor mount install thread ever" or whatever it's titled. i explained how you can go about doing this whole job by yourself if you don't have a car savy buddy to help you out.
ok will do. i ordered the motor mounts yesterday so i'll probably end up printing out that thread to read over/study it before i start the install
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
At 100k my rubber factory mounts were SHOT. Kept popping my damn lid open too, surprised it didnt crack it. Polys can be harsh when compared to stock rubber mounts. You will feel the motor more. But I persoanlly enjoy it and wouldnt change back to rubber for anything. I kept my rubber tranny mount though.