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Old 02-19-2011, 11:12 AM   #2
Wrenched Loose
AKA: Scott
Join Date: Sep 2004
Location: Austin, TX
Posts: 1,209
Vehicle: 2013 Malibu 2LT
Malaclypse a trusted member
Sounds like one of your rocker arms pulled the threads out of the head. The pushrod is banging around in there and likely causing that noise. I had the same sound when I left one of my rocker's loose on the first 3100 intake I did.

Pop both of the valve covers off and see if any of the rockers are loose.
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