Good catch! The pulley bolt torque spec is super high, ~250 ft*lb. But unfortunately they still come loose.
I feel like this problem has remained common as the cars have aged and with tires being stickier than they used to be, shocks to the driveline and therefore the crank are harsher.
Some...
Everything Dean has said, I've experienced too. It's most problematic under heavy braking at the track.
Big catch can at the crankcase vent is the best thing I've found so far. It's not a perfect solution, and the can fills up fast.
The valve cover vents don't seem to release much oil.
If...
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