Quote:
Originally Posted by Mike Taylor 3601
I started to use Gibbs break- in oil once... warehouse gave me a case to try..I was assembling my own engine,grabbed a quart....oiled up mains and installed crank(had already checked bearing clearance) crank wouldn't turn... pulled it back out... the oil did'nt have any slickness at all... cleaned off bearings and crank... lubed it up with Brad-penn or lucas break-in oil... set crank back in and torqued down... spun just like it should... I dumped that quart I opened and the other eleven in the used oil barrel...
looking back,I should have sent back to be checked...
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Are you running a steel cam core or cast iron? If iron, it needs to be nitrided. If stee,l make sure you request the cam manufacturer to micro polish the cam lobes. Also you must run DLC coated tool steel lifters (the old Shubecks will work in a pinch). I work for a distributor that sells Driven Break In oil and we go through several pallets every couple weeks without any problems. On the contrary I have heard negative things about the new Penn Grade break in oil. It's not the same formula as the original Brad Penn. I have a couple of customers that have Rockwell testers. It seems that the "good" traditional flat tappet non tool steel lifters will have a hardness rating of about 60c. Lifters also need to be checked for crown. I received a tray of lifters from Sealed Power that were Chinese. They had sufficient hardness but no crown to speak of. Because of that they wouldn't rotate enough to prevent the lifter from dishing and ruining the cam lobe.