Hi,

I've recently developed a rattle/vibration after replacing the front upper right control arm, motor mounts (oem), and installing a new Remark exhaust.
-The car rattles and vibrates at idle. Pushing the clutch in and out has no effect. Really noticeable in the cabin and can't really hear it outside.
-The rattling is really apparent when driving.
-I can feel a slight vibration on the pedals when driving. I don't feel vibrations when pushing the pedals at idle.

Weird thing is that the rattle/vibrations popped up soon after replacing the parts, but went away after a week. I drove around fine with no rattle/vibrations for a month then it just recently came back. What could it be? I've noticed that in the driving video, the noise started getting quieter when I went up in gears.

 

Did you replace both mounts? Was an impact gun used to install them? What about other mounts, like differential and transmission mounts? Exhaust hitting on anything?

 

Yes, both mounts were replaced using the gun. I'm currently on Innovative differential mounts that has been on for a year and a half. Transmission mounts have not been swapped out yet. I don't know if exhaust is hitting anything so I'll double check on that. Should I get new transmission mounts for peace of mind?

 

Using an impact gun to install the engine mounts can damage them.

 

Ah dam, I'll double check on those too... thanks for the help!

 

I have used an impact gun on the motor mounts. Every time.

The two botton studs are mounted in a common steel plate. The top plate is keyed to the aluminum bracket through the motor mount center plate. Thee is no risk of twisting or damaging the motor mounts, at least not on the S2000.