Keep everything in this thread. Thanks.
Im not sure on the drill / tap size. Should be a NPT size.thank you,I’ll get that done should I start a new thread or build on top of this one? The car only has 72000 miles on it,and when engine does run and sounds really healthy. It’s just overheating I’m thinking I have air in the system.i was told I need a 3/8 tap and a 37:64 drill bit does that sound right?