I have been trying to pressurize (air) the cylinders on my engine so I can replace the inner springs on my valve train.
I tried to use the 14-18mm "flexible air valve holder" built by performance Tool co..
The problem is that once I get the the hose fitting threaded into the spark plug hole on the RPM Performer FE heads, there is no way to tighten the hose fitting enough so that it won't leak down pressure in a few seconds.
The insert fitting is too short to get a wrench on to snug it up once it's down in there and the spark plug inlet hole is too narrow to insert any type of tool to tighten the damn thing up.
Can anyone recommend an alternative tool, fitting, or an adaptor that is compatible with the narrow spark plug holes on these heads?
Mark