How long have your motor mounts last??
05-25-2007, 10:55 PM
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How long have your motor mounts last?? I have a 99' SS that have replaced the motor mounts on before and now I believe they are going bad again. Have you guys with energy suspension or polyurethane had to replace your mounts again? Or should I just go solids and live with the added vibrations that they cause?
05-26-2007, 08:19 AM
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Yea same way with mine, first time I replaced them the motor was gravity mounted for a while the clamshell just fell out when I unbolted them. It is pretty clean under the car no oil leaks or anything, I think the mounts just crapped out because of the movement of the engine. The motor isn't stock though, its a 408 lq9 with a pretty good size cam I guess the poly might be able to with stand more then 30k miles of abuse.
05-26-2007, 10:03 AM
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solid mounts are not as bad as people say.there is a little more vibration but nothing i would consider unstreetable.besides it always makes me smile when the whole car jumps and rocks back and forth on a cold start up 
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05-26-2007, 03:26 PM
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Originally Posted by outkast6991
solid mounts are not as bad as people say.there is a little more vibration but nothing i would consider unstreetable.besides it always makes me smile when the whole car jumps and rocks back and forth on a cold start up
DAMN RIGHT!!!! LMAO
05-27-2007, 10:17 AM
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I just found these on thunderracing's website. Which is probably the ones I'll go with. They have a 10% off memorial day sale right now, they are $55
Prothane Polyurethane Motor Mounts (Pair), 98-02 F-body
Prothane Polyurethane Motor Mounts (Pair), 98-02 F-body
05-27-2007, 11:25 AM
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My motor shakes side to side excessivly, also when I start it up in he morning you can hear my y-pipe hitting the frame. I'll see if I can take a video of it.
05-27-2007, 08:33 PM
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Take the alt out it isnt too hard and unbolt the a/c compressor and move it out of the way. Then you can get to the bolts and get them out once you put a jack under the oil pan with a piece of wood between. The rest is pretty self explanatory. Bolting them back up to the motor can be a pain in the *** make sure you get the holes lined up just right when you try to bolt them back up.
06-02-2007, 12:17 PM
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Originally Posted by outkast6991
solid mounts are not as bad as people say.there is a little more vibration but nothing i would consider unstreetable.besides it always makes me smile when the whole car jumps and rocks back and forth on a cold start up
No problems with the solid mounts and the knock sensors?
06-04-2007, 10:57 AM
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I decided to replace mine when I was doing headers/clutch. The stock ones had 96k on them and they were completely trashed.
Installing them was an experience in itself. Now that I know what I'm doing I could easily get it done in half the time, but I would hate to have to do it again.
Here's a couple of tips:
- Do one side at a time
- Start with the passenger side as there's not a lot of room to hammer the bolt home if need be
- If you're having trouble lining up the holes, grind the tip of the bolt down to a point and hammer the **** out of it.
Installing them was an experience in itself. Now that I know what I'm doing I could easily get it done in half the time, but I would hate to have to do it again.
Here's a couple of tips:
- Do one side at a time
- Start with the passenger side as there's not a lot of room to hammer the bolt home if need be
- If you're having trouble lining up the holes, grind the tip of the bolt down to a point and hammer the **** out of it.
