Crank case pressure
Nobody can answer that for you. Depends on cam events and other factors. I only did mine before and after because I was having first start issues and then was checking health after accidentally hydrolocking.
A leak down and compression test wouldn't hurt and would be an interesting baseline
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Mike Costin stated to ME "Powder" can be used to seat the rings.
The Product BonAmia is a NO Grit powder.
Just introduce a small amount past your Airdoor.










