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Hello,

I had some similar problems on a car with a full exhaust. The tubing was not welded to the end of the reducer. The tubing was inserted past the reducer end over an inch. This caused a bunch of back pressure that only showed up for me at the track. Intake leaks, dipstick pushed up, ballooned up pan, leaks etc. This was a fresh motor also. Do you have a full exhaust?

Damon

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What are you referring to when you say tubing

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The 2.5" exhaust pipe was inserted thru the reducer and not mated to the end of the reducer just off the header collector. Caused a heck of a reversion that caused back pressure into the heads and then into the chambers from what I can tell. When the exhaust was corrected the problems went away. No other changes were done.

Damon