That damaged plug was from 1. I will do as you suggested and check it out with the rockers off. Definitely looks like it would be easier to pull the heads with the engine out, but I bet it can be done. Trying to find a corner out of the wind for this project, it's a little involved for a curbside job in the winter here.

 

Sounds like a valve issue. I don’t know if possibly the MDS system is holding the valves open or not. I can’t remember if the MDS holds the valves open or shut when it is activated. Hopefully it’s something cheap and easy to repair.

 

TrueDogman,

I loosened the rockers up, and that seemed to let the exhaust valve close. Must not've been quite TDC. Now I have air (doesn't seem like a lot) coming out the oil cap. Rings? I didn't get better compression with oil in the cylinder, so not sure this is lining up.

 

Pull the plugs out of all the cylinders, and run your compression test again with the rockers loose. See what ya get.

 

Still a big zero on that one. Going to go do 3,5, and 7 since i am there.

 

Sounds like a plan