6.0 o-ring head question

[GRN250]

Had a set of 6.0 heads o-ringed and noticed one of they cylinder's ring had a small gap between the wire ends. The other cylinders' didn't appear to have this gap. The machinist said the small gap wouldn't be an issue but I wanted to see if anyone had any experience with this issue. Thanks.

 

[DEEZUZ]

I've only dealt with a few and the gaps have always been 100% closed.

We have our own brand of o ring heads ill check them out Monday

 

[6.0 Tech]

Small gaps are not an issue. It really depends on how “small” you’re talking though. If it’s like 2-3 thousandths, not gonna be an issue, if it’s like quarter of an inch, that’s probably gonna be a problem. Biggest thing to remember is the o ring is not sealing the combustion chamber, it’s just assisting the gasket in sealing, so a little gap will not cause a sealing issue.


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[DEEZUZ]

Right. "fire ring" is misleading.

They are there to help with clamping force thanks to only 4 bolts

 

[GRN250]

Thanks for the replys. The gap is approximately 1/32" which is why it got my attention.

 

[GRN250]

Got in contact with a reputable head mfg. and their tolerance for "o-ring" end gap is a maximum of .050".