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Old Oct 1, 2012 | 05:08 PM
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antifreeze

Hey guys, I'm gonna flush my cooling system. My radiator has a little buildup inside, not much at all. Wandering what would be best to take care of the buildup, if it is an issue? I can find additives to put in antifreeze at my local parts store. Whats the name of the antifreeze that's already set up for diesels?
 
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Old Oct 1, 2012 | 05:22 PM
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Fleet Charge, I believe.
 
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Old Oct 1, 2012 | 05:44 PM
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Bashby is correct, Fleet Charge is the coolant thats GTG from the jug for these motors. Might want to call around before you go looking for it, took me 7 stores before I finally found a place that had it in stock.
 
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Old Oct 1, 2012 | 05:46 PM
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You can buy it from Ryder Fleet online, too, if you want ... or do what I did, buy four gallons of Prestone extended life and four gallons of distilled water locally, then buy four pints of Fleetguard DCA-4 online at Ryder (and some test strips).
 
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Old Oct 1, 2012 | 05:47 PM
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Thanks Bashby, the local Orielys doesn't have it on the shelf, but they can order it. He couldn't even tell me the name of it. My parts store I always delt with hasn't heard of that type of antifreeze, but has the additive. And he has been in business for years! I get that allot with my truck around here, either they don't know, or never heard of that.
 
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Old Oct 1, 2012 | 05:52 PM
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Originally Posted by kla94
My parts store I always delt with hasn't heard of that type of antifreeze, but has the additive. And he has been in business for years! I get that allot with my truck around here, either they don't know, or never heard of that.
I too have been amazed at how few brick-and-mortar stores have even heard of anything called "supplemental coolant additive" or the idea that diesels need any different kind of coolant.
 
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Old Oct 1, 2012 | 05:54 PM
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Thanks guys. Got a test kit the other day. Nitrite is real low, everything else is good. Can I do anything about the buildup? Shes not getting hot or even close. We have put drano in radiators on farm equipment and tractors to clean them up, but if there is a weak spot that is corroded too bad, well its not pretty. DO NOT want to do that to my truck!
 
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Old Oct 2, 2012 | 01:39 PM
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Here's how you do it on a diesel Benz ...

Mercedes recommends citric acid powder for flushing out coolant systems. It's a lot more gentle than using something like Drano, which is mostly sodium hydroxide (lye), and a lot less likely to put holes in your heater core or water pump.

You can get it from homebrewing supply places, like Williams Brewing.

I didn't do any sort of chemical flush, just poured water through. I got a lot of rust and out regardless.
 
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Old Oct 2, 2012 | 05:24 PM
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Thanks Flainn. Just wasn't sure. I'm just gonna flush my block with water. The radiator I'm gonna flush separate with the citrus. Have no heating issues, just seen the buildup and wanted to do something before it got bad.
 
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Old Oct 2, 2012 | 06:40 PM
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Originally Posted by flainn
I too have been amazed at how few brick-and-mortar stores have even heard of anything called "supplemental coolant additive" or the idea that diesels need any different kind of coolant.
Doesn't surprise me. I worked PT as a parts counter guy at establishments like these for years and never once had someone come in looking for a diesel-specific coolant. Heck, I knew nothing about SCAs and cavitation until I bought my truck 8 months ago.

Mike
 
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Old Oct 2, 2012 | 08:30 PM
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I have worked on deisel equipment for years and wasn't aware of SCA's.
 
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Old Oct 2, 2012 | 09:20 PM
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Originally Posted by kla94
I have worked on deisel equipment for years and wasn't aware of SCA's.
Cavitation doesn't seem to be such an issue on other diesel equipment. I'm not sure what it is about the Navistar 6.9/7.3 IDI designs that make them so susceptible. On Mercedes diesels it seems to be a non-issue, though people still recommend you use a coolant like Zerex G-05.
 
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Old Oct 26, 2012 | 02:16 AM
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i walked into my local napa today and told the guy i drive an older diesel and wanted SCAs. he gave me this bottle http://dl.dropbox.com/u/39418460/Pic...025_232012.jpg
is this correct, or did i just waste $10 on this?
 
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Old Oct 26, 2012 | 02:36 AM
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Originally Posted by joshofalltrades
i walked into my local napa today and told the guy i drive an older diesel and wanted SCAs. he gave me this bottle http://dl.dropbox.com/u/39418460/Pic...025_232012.jpg
is this correct, or did i just waste $10 on this?
Youre in luck, the guy knew what he was doin

I had known about SCA's my whole life, along with cavitation in high compression engines. Wasnt until i got here that I found out you have to replenish them lol.

Btw the 6.9 doesnt really have a cavitation problem, mostly the 7.3 IDI due to being bored so far. Thin cylinder walls and 21.5:1 compression ratio are not a good combination. But really, any high compression engine is susceptable to cavitation, CAT, Deere, IH, Ford, Cummins all recommend a coolant addative and i believe they all have their own brand to boot. Ive seen gas engines have problems with cavitation before too, not to uncommon in older race engines with alot of time on em.
 
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Old Oct 26, 2012 | 12:33 PM
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John Deere Cool Gard II antifreeze has the additives already in it and so does Fleetgard ES Compleat has everything in it good to go. the John Deere is available at any John Deere dealership and the Fleetgard is available at any CASE IH dealer or International
 
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