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Old 09-18-2010, 01:18 PM   #1
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Which Antifreeze /Coolant to use?

I have a (new to me) 2001 Monaco Dynasty with 370hp ISL Cummins I need to add coolant to the res. tank. I've also got Aqua Hot system. Question is: Should I use 50/50 mixture of ethylene glycol or propylene glycol-based/antifreeze. I know that a previous owner added the wrong mix to the Aqua Hot, then had to have it drained & flushed. Thanks for any help.
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Old 09-18-2010, 06:56 PM   #2
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RE: Which Antifreeze / Coolant to use?

If your Aqua-Hot was initially filled with the Camco propylene glycol coolant there should be a label on the outside of the unit to let you know.

For more information about which models and serial numbers and more information read the message, here: Yahoo! Groups

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Old 09-19-2010, 04:08 PM   #3
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You need a Heavy-Duty Coolant but I dont think I would add I think I would change, make sure that it is the green if not talk to a Cummins rep.
A combination of 50/50 water and low silicate antifreeze (ethylene glycol or propylene glycol are acceptable). Antifreeze must meet ASTM 04985 (GM6038M) specs.
Fully formulated coolant must meet ASTM 06210 (EG) or ASTM 06211 (PG) specs.
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