Originally Posted by mattderk
Yes 20/20 hindsight. In the end the issue was a jammed check valve and the o-ring was cut. GM installed the oil pump with a cut o-ring .. nice quality control. There is the source of my issues.
did they do it under warranty for you? how many miles did you have on it when it went?
most good performance shops will automatically replace the oilpump when doing a cam since it's right there (on these motors).
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