the oil pan bolts on the motor keep coming loose about every three or four days and especially when i race at the local dragstrip on friday nights. i broke a bolt in one hole and still haven't tapped it out to put a new bolt in and then my brother decided to over tighten two other bolts and stripped the threads inside the holes in the motor. even before before we broke the one and stripped the two, the oil pan bolts would still come loose. i'm thinking the pcv valve is bad and the pressure in the crankcase is building up since the valve isn't working properly and its causing the oil pan bolts to loosen so the crankcase can vent. that's just my guess