i recently replaced my vf39 and while i was installing i kinked the oil out line whiched forced all my incoming oil threw the intake side. i would check for a kink. i idled my car for 2-3 hour to burn it all out, checking my oil and coolant levels constantly. i also got a bottle of mystery oil to help clean out the engine of extra deposits. car runs fine now. also check the shaft for play. but thats where i would start.