difference between piston slap and other bad noises?
Thread Starter
On The Tree
Joined: Jun 2005
Posts: 117
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From: Humble Tx
difference between piston slap and other bad noises? my car has a knocking sound that occurs occasionally at idle. it doesnt do it constantly, just whenever it hits the right pattern in the cam lope, if that makes sense. the oil pressure gauge also fluctuates a bit during the noise, going down to around 20-25 then back up to 30-35. everybody says its piston slap, but it doesnt go away when hot. it always does it. also, i changed the oil recently and there was quite a bit of metal shavings on the drain plug. car does not smoke or run abnormal other then the knocking sound at idle.
my car has a knocking sound that occurs occasionally at idle. it doesnt do it constantly, just whenever it hits the right pattern in the cam lope, if that makes sense. the oil pressure gauge also fluctuates a bit during the noise, going down to around 20-25 then back up to 30-35. everybody says its piston slap, but it doesnt go away when hot. it always does it. also, i changed the oil recently and there was quite a bit of metal shavings on the drain plug. car does not smoke or run abnormal other then the knocking sound at idle.
Do you have a video clip? Sounds like what your describing is piston slap.
Thread Starter
On The Tree
Joined: Jun 2005
Posts: 117
Likes: 0
From: Humble Tx
yeah this sound doesnt go away. but it only happens at a certain point in the cam lope pattern.. and it vibrates when its knocking, and the oil pressure drops a little.. then it goes back to loping. doesnt knock at all when i get on the throttle. i cant figure it out. everybody thats heard it has said its piston slap, but everything ive read has said slap goes away when it warms up, and this doesnt go away. from the back of the car it almost sounds like a popping sound coming out of the exhaust when it does the knocking.
