Thread: Scraping noise at low speeds.

Please list everything that has been changed and broke since that other thread started. 22 pages is a lot to fish through. This would help everyone.

Originally Posted by Bedwards

New parts:

VS cam
G8 springs and retainers
Stock pushrods
Stock timing chain and dampener
LS7 lifters
Stock valve seals
All new gaskets (head, LIM, front cover, water pump, supercharger etc.)
Passenger CV joint/axle
Passenger side ball joint

LS7 lifters, new pushrods, new gaskets, new valve seals, axle and the ball joint were all put in after the valve keeper incident.

I'm leaning towards the timing chain stretching if it went through that abuse. And my bad, I didn't catch what you had written at the bottom at first.

Originally Posted by Bedwards

I know timing belts stretch... But I've never heard of a chain stretching. I know they wear, but this chain is brand new. Couldn't have worn that fast. The only thing I can think of is if the tensioner was somehow lose, and the chain was rubbing on the block or something. But even still, I get no noise when the car is up on jacks, in drive.

You should see how much the chain that was on my Regal stretched. The tensioner was hardly doing anything anymore. Yeah it had 200k miles on it, but they do stretch.

Originally Posted by Bedwards

I put the car in park and throttled it up to the 1400-1800 RPM range and I can hear the noise. So it's gotta be engine related. I'm just confused on what would cause this noise.

So now it does it in park vs before only when driving? Please check the timing chain before something serious fails. At least have someone rev the car while you're checking for where the noise is coming from. The gaskets for the front aren't that much if it is the timing chain.

It might have always done it in park, I could just never really hear it I guess. I must have forgot to roll down the passenger window. I'll check the chain this weekend. Could the oil pump cause this?