Hi all,


I took my cylinder head out and had it resurfaced at a machine shop. The machinist did a pressure test and mentioned that the valved are in good condition and don't need a valve job and so the head just got resurfaced.

I took it back home and spent sometime cleaning up the head at where the intake and exhaust ports are...and used some brake cleaner to clean off the carbon. I noticed that one of the exhaust valves was leaking the brake cleaner while all others seemed to have a tight seal.

This is rather obvious of a valve problem?!, but does it mean I definitely need a valve job and should have taken it back to the machine shop for a complete valve job?

Thanks.

 

It can indicate a valve leak. Better safe then sorry. Try taping the valve open and closed a few times it may just have a peace of carbon on it holding it open. Taping it open and closed will brake the carbon up.

A pressure test to me is looking for a crack in the head to the coolant passages. A vac test to me is applying vacuum to the compression chamber and testing for valve to seat problems. Maybe thy have different methods then what I'm used to.

You could also just lap them if thy are not in bad shape.

 

nows a good time if any to build up your head man