valve to pistion contact

[Cutting-Edge Diesel]

No. Dont even have a tool to take them apart. I just have my head shop do all that.

 

[Cutting-Edge Diesel]

took a closer look at the had today and it ended up to be cracked anyway. but there is the thing Its .015 thinner than another already surfaced head. yikes

 

[Mdub707]

What's the overall thickness of that head though? It would be interesting to see the spring rate differences between that one valve spring and the others.

Also, just thinking out loud here... I seem to recall the tolerance for valve lengths being quite large, somewhere in like the .040" range (I don't have specs in front of me here) but perhaps that one valve was on the ragged edge of that tolerance, and coupled with the head being decked too much, perhaps it's just a coincidence??? I'd like to know the head thickness, and the valve stem lengths...

 

[Big Angry Hillbilly]

Check the guide, as well as the valve stem.

Measure the guide and make sure it's not out of round, tapered, or otherwise messed up.

 

[Cutting-Edge Diesel]

head was junk anyway. every cylinder had visible cracks in it. ill look into it closer if i ever have time.