Rattling on Cold Start
Thread Starter
Intermediate
Joined: Jan 2007
Posts: 45
Likes: 0
From: Winston Salem NC
Rattling on Cold Start
I have an 07 C6 with 3700 miles. I have noticed twice now on a cold start(after sitting for a couple of days) a "rattling" noise. It almost sounds like the engine is running without oil for a few seconds. The noise goes away after a few seconds of idling. The oil has 2500 miles on it and checks full. Anybody else noticed this or have this problem?
Burning Brakes
Joined: Jul 2007
Posts: 819
Likes: 0
From: South Corona, California
Most likely it's the pistons themselves. I think they are hypereutectic, which can make noise until they heat up and expand. Do a google search with "piston slap" and "ls2" you'll get more info as it's been around for awhile.
Thread Starter
Intermediate
Joined: Jan 2007
Posts: 45
Likes: 0
From: Winston Salem NC
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