What caused this...
#1
What caused this...
At 135k at the very least the upper plenum did not look like this. It was a bit bronze looking but no black gunk. At 135k I had it opened up cleaned following items egr port, egr valve, throttle body. Replaced pcv valve then also with aftermarket valve. At around 150k changed pcv valve with oem valve. I believe the aftermarket pcv valve may have been faulty as when I took it off and shook it I didn’t hear a rattle. Soon after decided to change leaking front valve cover gasket and this is what I was greeted with.
Last edited by E39; 12-26-2020 at 03:39 PM.
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justnspace (12-27-2020)
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