I bought a set of ported 317 heads with patriot 650 springs. One of the intake valves has the center of it sucked up into it. The retainer and spring are sticking up about 1/4" higher than the rest. The valve looks like you hit it with a ball-peen hammer right in the center of it. Nothing seems to be hurt but I am going to have it checked out. My question is would the springs have caused this and has anyone had a problem like this?

 

Does the bottom/face of the valve look cupped?

 

yeah thats what i was trying to decribe.

 

anyone have any input?

 

The spring did not caust that. That valve went through some trauma! Have them all checked, that is likely not the only one with issues.

Frank

 

Detonation is what caused that!

 

Thats kind of what I was thinking. Massive detonation. The heads are at the shop getting checked out. thanks guys

 

Yeah I picked up a motor and it had two cylinders like that. They even put a hevier spring on it to try to get it to seal

Check the guides as the valve is bent, I am replacing the whole lot.