SL6 will not start with the key.

I took a compression test and the #2 cylinder showed 0. So I removed the valve cover and discovered the valve was stuck in it's guide. Also push rod was bent, lifter was out of it's bore. The rebuild guy came and confirmed valve got stuck in it's guide which cause this chain reaction. I rapped on the valve with a hammer when spring was up, valve sank first two shots and then started bouncing as it should. We were able to put the lifter back in it's bore. Now he is on the hunt for a push rod and will try a restart before we go to the next step and pull the head. Pray or cross your finger which ever one you do! LOL!

Is there any know way to add clearance between valve stem and valve guide without pulling the head? Lube etc.?

((It was amazing to me that he put that lifter back in it's guide without taking the head off!! Jerry's Wife))