Cracked Block (Ugh)
 

This morning, while in the process of tearing down a 1946-1948 Ford flathead and inspecting the block, we discovered a crack. Here is a picture of it. The plan is to take it down to a gentleman with years of experience repairing blocks but I thought I would post a picture of the block here to see if anyone has dealt with any similar problems and how you went about fixing them.

Re: Cracked Block (Ugh)
 

Re: Cracked Block (Ugh)
 

From my perspective, if that is the only crack, not a huge deal in that the water pump gasket will cover it - so there should be no leaks. BUT, it was probably a water freeze situation that caused the issue, so I'd really have the rest of the block checked out to see if there are more surprises to be found. It needs to be magged and pressure tested at the very least - if that passes, then I'd sonic test the bores as well. Checkout the pan rails very carefully - as freeze cracks tend to appear in them as well. Best of luck

Re: Cracked Block (Ugh)
 

By all means, pressure test this, magnuflux it.
Like B&S said, don't fix it!
Use a straight edge to determine surface irregularity.
Use a good sealer, I like Three Bond 1184

Karl

Re: Cracked Block (Ugh)
 

Thank you all for your help. Tom

Re: Cracked Block (Ugh)
 

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