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BATSLOMAN GIVES NO FUCKS.
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4,045 Posts
clean it and inspect. we see what you see.
 

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93 Civic HB SI
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283 Posts
It's hard to tell, but it looks like a rust trail moving from one end of the cylinder to the other.

If the block was stored on it's side and water or oil traces were allowed to collect and run over time, I could see a trail like this occurring.

Were you going to hone/bore yourself before building the engine? If not, ask the machine shop to magnaflux the block. The procedure will tell you beyond a doubt if it's cracked. Machine shops normally charge around $50 for the service, on top of other work.

Either way, a machine shop can do this for you on a walk-in basis for the same price even if you are doing your own work. It might be good piece of mind during your build!
 

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08 H-D Ultra Classic
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985 Posts
The guy was probably weak and busted a sweat moving that big ol block and 1 little droplet ran down the cylinder wall.

I would grab a can of PBblaster or WD40 and a rag and see if you can clean it off.
 
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