What Is This Coolant Crud ?........ - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 04-17-2004, 07:46 PM Thread Starter
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What Is This Coolant Crud ?........

Any ideas as what this stuff is? I flushed out the coolant and this lovely goop was in the overflow bottle. It basically remains suspended in coolant. I ran it through a paint filter to try and identify it.....
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post #2 of (permalink) Old 04-17-2004, 08:02 PM
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Re: What Is This Coolant Crud ?........

my guess would be rust from inside the engine
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post #3 of (permalink) Old 04-17-2004, 09:00 PM
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Re: What Is This Coolant Crud ?........

Looks like someone has not been using distilled water in your system. Or a block sealant has been used.
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post #4 of (permalink) Old 04-17-2004, 11:10 PM
 
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Re: What Is This Coolant Crud ?........

Yup must be that distilled water, I'd try Gatorade.. [img]images/graemlins/grin.gif[/img] Do you do any mudding? everytime I've ever drained my radiator there's been goop like that in it and I seal the heck out of my hoses and overfill bottle....??
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post #5 of (permalink) Old 04-18-2004, 01:06 AM
 
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Re: What Is This Coolant Crud ?........

Looks like aluminum oxide based crud. I've seen old aluminum military canteens develop
a sludge that looks something like that. In that case I used something like (Clean)
aquarium gravel and 1/2 full of water and sort of sloshed it around for awhile, dumped it,
rinsed it repeatedly, then boiled it to really kill anything left. Don't think that trick
will do you much good Crow!
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post #6 of (permalink) Old 04-18-2004, 05:40 AM Thread Starter
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Re: What Is This Coolant Crud ?........

2 things to note.... distilled water wasn't used (but is now after flushing) and Water Wetter was used (but isn't now)....
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post #7 of (permalink) Old 04-18-2004, 05:44 AM Thread Starter
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Re: What Is This Coolant Crud ?........

Studly, your problem in not that mud is entering the cooling system as the system is closed. If the elements can enter into it, you've get a major cooling sytem problem.
My guess is like mine, that the problem is coming from within, like not using distilled water....
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post #8 of (permalink) Old 04-18-2004, 09:22 AM
 
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Re: What Is This Coolant Crud ?........

Aluminum material has a thin surface layer of aluminum oxide, if you remove this layer and expose virgin metal a layer of oxide forms in seconds, using oxygen from the air. This can be scrubbed away by the solids in tap water circulating within the cooling system and accumulate along with the other impurities (iron, copper, sand, lead, tin, zinc, chlorine, phosphates etc.) from tap water to produce the sludge you see here. I think the block, heater core & radiator act like sacrificial anodes and over time release material as well. I've seen iron blocks that have been neglected produce so much rust in the cooling system that the coolant looked like red paint draining from the hoses! I go a step further than distilled water and use water filtered via reverse osmosis then de-ionization resins. Run it for a week then change it out & you'll get more crud than you can imagine flushed from the system but may spring a leak in any weak corroded spots. This water is so pure it's not recommended for drinking. I think JerseyZuk said Walmart sells reverse osmosis water but this has not been post filtered via the DI resins.
HTH
See ya..........
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post #9 of (permalink) Old 04-18-2004, 07:26 PM
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Re: What Is This Coolant Crud ?........

I recently burned a bearing in my 87 Sammy's waterpump. My system was full of it when I changed it out, a bunch of black gunk suspended in the radiator fluid. Prior to that, the coolant was the color of my antifreeze...red. I don't know if the waterpump could have contributed, but it sure was coincidental.

I replaced it, did about 6 flushes and it cleared up. No problems since.
post #10 of (permalink) Old 04-18-2004, 07:44 PM
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Re: What Is This Coolant Crud ?........

could be sea monkeys...
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