25psi in head

[sharkinthepool]

My cousins 300ex stopped running on him on Saturday. He was all bent out of shape about it. But after we got him calmed down I reminded him that his valves have needed adjustment for a while and the last guy that did it screwed it up.
After a compression check on his head he has like 25psi?:eek2: I was like WTF. Does anyone know what happened?

[sickmojave]

I would adjust the valves and test again.;)

[Aceman]

Check your valve clearances, then crank it and check the compression again. If it's still reading low, it's time for a teardown.