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Old 03-09-2013, 02:00 PM
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Flood watered engine

I just joined, I'm putting together a rat rod. I've got a 70 gmc for a platform to start. Can an engine be used if it went thru flood waters. I've heard both. That it can and shouldn't be used.

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Old 03-09-2013, 03:46 PM
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If the motor was submerged under water then you can definitely NOT use it.
The motor should be taken totally apart and gone over. It will have lots of rust inside and will need to be rebuilt.
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Old 03-09-2013, 03:49 PM
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I don't see why not. I would break it down and inspect it. Give it a good flush and run it. Changing anything electrical of course. I might be a little leary if it took a salt water bath. If it did I would think it should get a proper tank bath like what you get at a machine shop. But at that point you might as well rebuild it. Let us know how it works out.
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Old 03-09-2013, 03:52 PM
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If it was fresh water I wouldn't think it would have a lot of rust. I guess it would depend how long it sat uner water. But if everything had a coat of oil on it I wouldn't think it would be very rusty. Inspect it for sure.
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Old 03-09-2013, 04:29 PM
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under watter

if the engine was under water toatle,and atended to within days of salvage,not a problem.soon as out of watter fill it full of light oil or even diesel fuel till you desmantel. of coars u rmove al the watter (all pugs out pan drained etc.

was involved with a 4cyl cat gen set submerged in 100ft of salt watter for over 1 year,soon as it was raised we dismantled vertually no damage ,just a quick di assem and atention.
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Old 03-09-2013, 04:55 PM
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As long as it doesnt have some bent rods....
Engines dont run well underwater, water does not compress.
As long as it turns over well, you MIGHT be OK.
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Old 03-09-2013, 05:49 PM
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I had a customer that stored a sbc in his shed. Wrapped tightly in a garbage bag waiting for the chassis to be done.
Long story short. Water flooded his garage about 18" of Flint river water.

His friends told him to just remove pan and spark plugs, wash it out good, lube it up good, put it back together. Which he did.

When the car was done. The owner fired it up and wemt for a test drive. At about 5 miles he noticed a loss of oil pressure and increased valve noise. Limped it back home and pulled engine.

The bearings were completely wiped, little if any material left, cam bearings badly worn. Shafts all showed high abrasive wear. He brought the block to me for diagnosis. The filter and oil galleys were full of an oil and silt/sand mix. I think he learned an expensive lesson.
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Old 03-09-2013, 06:22 PM
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i would do a full rebuild of that engine. i would not put $1 into something that you are not sure thats gonna last 2 mins. take the extra time and check everything. unless you feel lucky, then go for it. But i say no.
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Old 03-10-2013, 10:13 AM
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cleaning engines

We used to take a 55 gallon drum,fill it half full of water,take 4 cans of DRANO,mix well in a seperate bucket,build a fire under the drum,when the water is boiling,add DRANO water,lower engine block,(with freeze plugs,and oil gallery plugs out) using an engine hoist,let her boil,use a dipper to remove floating scum from top of water,we used a seperate drum,of soapy water (also boiling) removed block from one drum to next.can also strip heads and manifolds (NOT ALUMINUM) cleans GREAT,use a pressure washer after removing parts from drum,lotta work,BUT,excellent cleaning.dont forget to oil cylinders after block and parts have cooled...
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Old 03-10-2013, 11:28 AM
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That is a home made hot tank. I have one at home in my barn. Just don't leave the cam bearings in the block. the bearing material will float to the top of the tank or plate itself on other parts.

Nowdays the environmental nazis would have you paying your hard earned dollars to stay out of jail.
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Old 03-10-2013, 01:25 PM
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Bearings

Thanks Bob,I assumed everyone had enough sense to remove all bearings,including cam bearings..
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Old 03-11-2013, 02:52 AM
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Quote:
Originally Posted by cliff tate View Post
if the engine was under water toatle,and atended to within days of salvage,not a problem.soon as out of watter fill it full of light oil or even diesel fuel till you desmantel. of coars u rmove al the watter (all pugs out pan drained etc.

was involved with a 4cyl cat gen set submerged in 100ft of salt watter for over 1 year,soon as it was raised we dismantled vertually no damage ,just a quick di assem and atention.

My "Yellow Submarine" huh??.LOL-LOL-LOL!!!.
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