Question about Chevrolet 1500

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I have a 99 chevy c1500 5.7 vortec. 154,xxx has a random misfire on cylinder 6. Losing coolant somewhere, thinking internally. Also has a lifter that will tap for 30-60 seconds randomly when started cold. Think it could be intake gasket? I'm hoping its not head gasket. Shop told me the compression and spark were good. Any help would be appreciated.

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A good test would be a smoke test to see if smoke comes out the intake, another way is to spray carb cleaner on intake port for take cylinder and see if it runs richer. i think you may have a bad intake or gasket these are kown for intake leaks, if you had a bad head it would run hot,i would pull the intake and check the gasket.make sure to use the old design not the new plastic type gasket with rubber oring seals.

Posted on Oct 08, 2010


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