Roy
They said they did not work on the guides. They were reported ok
Jerry
That is what my brother suspects is that the new seat is ajar and when the valve closes it can't seat straight. I am not sure which seats they replaced I do know that when I took the head apart this valve was difficult to remove. Once I got it loose with wd40 it would move only so far then stick.
I told them that this valve seemed problematic ... That did me a lot of good
I am still trying to get the truck towed from middle of nowhere Maine
Rich