So a little water got into the cylinders - Hot Rod Forum : Hotrodders Bulletin Board
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Old 08-29-2010, 12:54 PM
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So a little water got into the cylinders

what's the worst that could happen? I was *told* this engine (400M) was out of a running car until it wrecked. It then sat out in the weather for a period of time. Assuming there's nothing wrong with it, what would it take to refurbish the cylinder walls?
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Old 08-29-2010, 01:05 PM
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FWIW as soon as I cracked the head bolts, there was a really funky smell.
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Old 08-29-2010, 01:53 PM
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That could only be answered by a machine shop. It would have to be bored in steps to find out if 30K-60K would clean it up before the purchace of new pistons.
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Old 08-29-2010, 02:09 PM
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That's bad news. I read that you shouldn't go over .040 on this block.
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Old 08-29-2010, 02:12 PM
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Spray some WD-40 or similar rust loosener on the cylinder walls and see if any of it will wipe out. If you can feel a ridge or anything near the top, it will be very questionable.
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Old 08-29-2010, 02:54 PM
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sunbelt57,

I don't know how much this engine means to you. If you must have this engine it can be sleeved so that all cylinders are all the same. You would not want to repair these cylinders by boring them and leaving the others alone. So If the other bank of cylinders are clean and not tapered then sleeve this side and bore them to match the other side. Then install all new pistons.

Good Luck
Scholman(retired)
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Old 08-29-2010, 04:09 PM
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I'd try boring it .030 and see if fixes it. If it doesn't then sleeve it.
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Old 08-29-2010, 04:20 PM
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Quote:
Originally Posted by sunbelt57
That's bad news. I read that you shouldn't go over .040 on this block.
Even .040 is to much on 351m 400m... It will run hot I know this from experience... But theirs a lot better cooling options now than when i had a go at it...
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Old 08-29-2010, 07:57 PM
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That should clean up OK... but only the machinist can tell you how much it will take.
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