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HELP! '05 CTS - 3.6 -Hole in timing Chain Cover! Still running

Old 09-17-2010, 08:41 PM
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Join Date: Sep 2010
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Default HELP! '05 CTS - 3.6 -Hole in timing Chain Cover! Still running

Hello all,

My Father in law was driving his 05 CTS (80K Miles) home tonight and had a billow of smoke come out from under the hood. Turns out a hole, actually a chunk, of plastic timing chain cover (pass side, top, kind of under the intake manifold) came off It is a near perfect cut in the path of the timing chain (as if the chain jumped a tooth and itself cut a path) I am too new to attach a picture. I am wondering...
  • What on Earth would have caused this?
  • Any risk of serious motor damage?
  • How hard of a job is this to replace this cover? Looks like the intake manifold and lots of front mounted components have to be removed.
  • Does the whole chain assembly need to be replaced?
  • Aside from the hole and the oil spray from the damaged cover, it is running well.

Thanks in advance!
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