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Old 05-27-2018, 11:12 PM
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weird crack in block, is it somehow NOT a problem?

i guess it's always a problem but still. i dont remember seeing this there last time i did anything but maybe it was there and maybe it wasn't. here is a pic of it. it's in a non critical area and i only see the crack at the top and not on either the inside or the outside. sbc. just a crack at the top of the sealing surface to the intake at the front of the block as shown. the crack is just below the hole. just want to say i doubt anybody is going to say anything that will make me junk my block. be more careful with it, yes; completely ignore it? Definitely!
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Old 05-28-2018, 12:40 AM
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That doesn't look like a crack to me, at least not from that picture. It looks more like a scrape or drag mark that occurred during handling. Cracks in cast iron generally have a grainy look to them.

You ae right, if it is a crack that is an odd place for one, as there is no stress of farce in that area. It wouldn't be any problem at all unless it goes all the way down to the camshaft bore.
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Old 05-28-2018, 12:57 AM
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Looks like a mark from dragging the block across a bench top, doesn't look like a crack to me either. If it was you would see propagate on the inside or inside of the China wall.
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Old 05-28-2018, 07:37 AM
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Crack

I agree. However, if you have the engine out, I'd recommend taking it to a machine shop if you have one close by and have then Magnaflux it. Only takes a few minutes. If not, I would clean it really good and rub a little emery cloth over it and down each side and have a look with a good light. I worked for Magnaflux for over 31 years so I'm always suspicious of crack-like indications.
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Old 05-29-2018, 09:35 AM
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rub it lightly with some emory cloth, clean with alcohol and using a bright light held off-center, look for propagation (little spider lines). Thats very sharp looking, like a scribe mark, and its almost perfectly straight. One would thing it'd be closer to the hole, or have a curve to it, not be completely perpendicular and straight.

Back in the dark ages, guys used to use kerosene and fine chalk-dust, to do crack inspections...I mean check things for cracks.
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Old 05-30-2018, 09:57 AM
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thanks guys, engine still in. will do the crack inspection when my wife gets home.
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