My 617.912 began to overheat, unexpectedly. Luckily, I only had to drive it 2 miles
back to the barn.
Tore out the water pump, but it was fine. So the engine had to come out.
I split the head last night, expecting I'd be able to find a breach, somewhere. Here
are the pictures. The yellow highlights point to my suspected leak. The threaded
boss in the block has rust at the location, unlike any other boss.
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click pic large versions>
What think all? I plan to inspect the head for warp over the weekend.