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TR2/3/3A TR3 Head Gasket [Again]


Jedi Trainee
I just discovered that upon close inspection, the NOS Payen head gasket that I've been saving has a small defect - it has this odd "fold" on a small portion of the outer edge where the main sheet is not retained by the edge wraparound. How critical is the outer edge? Question: Does this look useable or should I throw it out?


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Great Pumpkin - R.I.P
I'd probably give it a try. My experience has always been that compression gases are the hardest thing to keep sealed, and that area only has to seal against coolant.


Jedi Trainee
Hi Randall, perhaps my photo is not clear, this is the edge that is about 1" away from the #1 cylinder.


Great Pumpkin - R.I.P
Yes, but there is water jacket between that edge and the cylinder. The really heavy-duty sealing happens at that inner ring around the cylinder. If that was damaged, I'd say "no go", but I think that outer edge will be fine. It only has to hold 20-30 psi tops, not the 1000+ psi inside the cylinder.
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