Originally Posted by ccperf721p

Magnafluxing wouldn't do any good on the aluminum head.

I personally use loctite 569 anaerobic sealant. I just make sure everything is in place so that once I apply sealer to the first stud, I can finish installing that head within 20 minutes. Let it set for a day or two before putting any water in the block. Never have issues doing it this way.