Thread: Hello from an old member

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Perry, it almost sounds like the o-ring is too big or your groove is too thin causing the o-ring to hold the head up and not allow the gasket and o-ring to seat. I've seen this happen on some diesels and it does get old for sure. Hopefully you can figure it out and retain the o-rings. They do work great when everything is right on.

Originally Posted by 40FordDeluxe

Perry, it almost sounds like the o-ring is too big or your groove is too thin causing the o-ring to hold the head up and not allow the gasket and o-ring to seat. I've seen this happen on some diesels and it does get old for sure. Hopefully you can figure it out and retain the o-rings. They do work great when everything is right on.

That has given me food for thought Ryan?
When the head come off this Sunday I will drop a straight edge across the O rings to see if I can measure any problems. These have been ok for my many 9.6 passes. Its only since I added some timing that the head gaskets have leaked due to increased peak cylinder pressures?
So maybe the O rings are not completely flat?
Thanks for the info

Perry