Quote: That's what I thought,we usually make sure they are clear,put .050 restricters to the rockers and install a 3 quart Accusump.If the issue presist we drill and tap the lower head area about 1/3 the way from the front and back and run two external return lines to the pan on each side of the engine.
Is oil return a problem with B1 heads?
We have limited experience with the B-1s,but we found that getting proper oil to the rockers was a pia and yes we installed external oil drainback lines on the B-1s.If we didn't then the amont of oil at the valve spring seats was a large volume until it got high enough to drain to the lifter valley.
