Update: thank you all for the suggestions.

The epoxy I have is Belzona 1111, it was $328 cdn with tax and shipping and CAT recommends this product so I am hoping it works. I will phone in the morning and see if the crack length is a factor. I am concerned that the integrity is also compromised not just the water jacket sealing.

The engine is definitely a 235 block. I replaced the original 216 with a 235 I pulled from a 53 Chev, then a few years later I had the bottom end of the engine rebuilt at a machine shop after a rod bearing went.


1945 Chev Panel truck, 53 chev engine, owned since 1968