LT1/LT4 Tech 1993-1997

cleaning oil/coolant sludge from engine

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Old 02-29-2012, 10:31 PM
borjawil's Avatar
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Default cleaning oil/coolant sludge from engine

Ok so blew a head gasket a while ago and since winter hit havent dug into it too much. Instead of changing the head gasket Im going to try this stuff the military uses to seal blown head gaskets. Its get mixed with the coolant. But first I have to clean the sludge out of the engine and cooling system. How would i go about doing this? drain as much from the engine and cooling system as possible and put new oil in and antifreeze with the gasket sealer stuff? Ive heard of flushing with diesel. How would I do that?
 
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Old 03-01-2012, 12:30 AM
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the gasket saver is short term and does not always work. you should have drained the oil right away. put a container under it and drain the oil. then empty the container and take the plug back out and let it drain for a couple days. the diesel will do more damage than the leftover gunk. flush the cooling system good.
 
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Old 03-01-2012, 11:58 AM
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Ok well ill continue removing the intake and heads then. thanks!
 
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Old 03-01-2012, 04:30 PM
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The military uses that stuff just for a quick battle field repair. They don't use it for any type of long term fix. As soon as they get the wounded vehicle to the repair yard, the mechs tear it apart and do a proper repair.

It is never a good idea to add diesel (or any other fuel) to your oil. You will do a lot of internal damage to any modern engine. Way back when, we would add some ATF to the oil and run the engine for 15-20 minutes to help break up the sludge before a rebuild. Most of the crud from the old dino oil would break free and drain out with the oil. Made tear downs a whole lot cleaner. But, I would not recommend doing that unless you were doing a complete rebuild.
 
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Old 03-02-2012, 07:07 AM
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okie dokie sounds good. Already removing the heads. Drained the radiator and doesnt seem to be a lot of oil coming out. Will drain the oil today, hopefully not to much antifreeze made its way in there.
 
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Old 03-02-2012, 08:37 AM
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Watch closely when you pull the drain plug from the oil pan. Oil floats on water, so if there's any antifreeze in the pan, it will be the first thing to come out of the hole.
 
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