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Hi Dan,
Is that right 0 compression in nr 3 ? 0 sounds nasty.
Did you pour some oil in there to confirm ?
If not
Pour some Marvel Mystery Oil in there and try the compression test again.
It's unlikely but not impossible that the rings are hung up and MMO can help free them with a several day soak
Yes you could have a valve or head gasket problem or even a hole burned in the piston. Dunno if you can get the Harbor Freight Boroscope in the cylinder to examine the piston.
Whats the coolant look like ?
I'd try a several day soak of MMO and try the compression test again.
Nothing to lose.
Bill
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