Update March 4th:
Machine shop resurfaced head + new valves + hardened seats. They commented the head was in excellent shape internally, but needed the valve job. I had them throw in hardened seats while it was there.
Cleaned up decking on block with razor blades and found a small torched...
Update February 16th (originally posted: Jan 22nd)
Didn't have access to an air compressor and decided to forego the leak-down test. Ended up buying an inexpensive borescope.
Was able to identify a blown head gasket using the scope inside the cylinder itself.
I successfully removed the head...
Thanks for the quick reply - I really appreciate it.
Definitely original engine from 1969 - I found the crack in the exhaust manifold on the underside (see photo).
I don't think a quick JB Weld job would cut it for this crack - I'm probably going to look into a replacing the manifold entirely...
Just wanted to say thank you to this forum - I bought my first project boat last year and wouldn't have her running without all the great threads here. About the boat - unsure of prior owner's history of winterizing...Also shame on me for not doing a compression test. Bring on the comments...
