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View Full Version : weird clunk on shutdown



specops_SC
03-29-2004, 10:12 AM
when i turn off my car i hear a knocking sound coming from the engine. almost like something getting hit. it does it cold or warm. i havent noticed any vibrations when it does it. the car got new motor mounts about a year ago and i doubt they're going out. i just want to know if this is something that could be a problem later on.

turbospeed
03-29-2004, 01:41 PM
sounds like a motor mount to me.

Digitalchaos
03-29-2004, 06:34 PM
What kind of motor mounts did you get, and from where?

Parker Dean
03-30-2004, 09:24 AM
I'll bet it's the supercharger.

Or more specifically, the nose-drive-to-gear-fingers have some free-play and when the engine stops it rocks back a bit and you hear a short, single, knock. My XR7 has done that for well over 100,000 miles and so far no issues with the supercharger.

specops_SC
03-30-2004, 10:30 AM
yeah, thats pretty much what mine does.

digitalchaos:
the motor mounts were replaced with stock mounts by the previous owner and had a shop do the work. the engine is pretty smooth though. no significant vibration.

i'll double check the supercharger thing, but im pretty sure thats it. thanks guys..