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Old 12-10-2018, 12:47 PM   #1 (permalink)
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Default What's this on my cylinder wall?

I bought it like this. Dude said it was no problem. I can't feel anything with my nail. Is it cracked?
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Old 12-10-2018, 04:01 PM   #2 (permalink)
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clean it and inspect. we see what you see.
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Old 12-10-2018, 06:54 PM   #3 (permalink)
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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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Old 12-11-2018, 05:12 PM   #4 (permalink)
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Big ol rust snail trail.
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Old 12-12-2018, 05:03 AM   #5 (permalink)
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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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Old 12-16-2018, 12:35 PM   #6 (permalink)
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It's a rusty blood trail. Deglaze with marvel mystery oil, and recheck.
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