5.3L valvetrain tapping like a sewing machine.

Asked by Ahartracing Jan 22, 2020 at 09:07 AM about the 2007 Chevrolet Impala SS FWD

Question type: Maintenance & Repair

140k multiple engine valve tap. Rebuilt
cylinder heads with new springs.
Replaced pushrods, all lifters. Everything
looked and measured like new. Multiple
engine misses with traction control
codes. I have adjusted valves by the
manual. Oil pressure by professional
gauge within normal specs. Drives good
down on power. Feels like a problem
with did system? What could be
happening?

1 Answer

Your Answer:

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