Mechanics

SUBARU LEGACY NOISE PROBLEM

1998 Subaru Legacy • 200,000 miles

Changed the head gaskets & but when I started it had a loud knocking noise it didnt have before the change.I checked the oil it is good. What could this noise be.
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March 30, 2013.



Is the engine running normally since the work (other than the noise?) Does it have a misfire?