Rattling under the hood [Archive] - GrandAmGT.com Forum


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03-08-2004, 07:56 PM
Belt tensioner?

It's a plasticy rattle.

03-10-2004, 06:08 AM
Does it change with engine speed? Does it change when you hit bumps?

03-10-2004, 02:56 PM
Actually it's only noticable in idle (I can hear it loudest when I'm at, say, a drive thru window) I rev to 1500 rpm and no noise.

03-10-2004, 08:34 PM
PCV valve. Get under there and listen, I'll bet thats what it is. They can get rattley, just like you described, and then go away with the Revs up.

03-15-2004, 06:45 AM
I would have never thought of the pcv valve. That would certainly be a cheap and easy fix. My guess would have been the idler pulley. Let us know how it turns out.

03-15-2004, 01:47 PM
I'll let you know for sure... it could be the pcv valve, but I'm not sure cause it was just changed recently. The pulley is more likely cause I can see it kinda shimmy back and forth. It's cold here now, so I'm gonna wait til it's a little warmer to look into it.

lol Recovering from my power steering pump fiasco.