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Old 08-16-2015, 08:07 AM   #1
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Onan 7000kw QD Generator

I don't have a manual for my Generator, so I have a question.
I need to add Coolant to the radiator on my Onan 7000kw QD, and am wondering if there's a specific kind of coolant necessary. I have coolant that is specified for diesel engines, not sure of the brand as it's in my coach in storage.

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Old 08-16-2015, 08:16 AM   #2
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try this its a 7500 but it should be the same i use regular auto anti freeze as the small diesels are not prone to cavation problems as the large diesels can be

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Old 08-16-2015, 08:34 AM   #3
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I used the same thing as I used in the CAT C7 engine. Easier to remember what I used if I kept them the same. I used Shell Rotella Extended Life Coolant which is one of the new types of antifreezes out there. Before you use it, make sure you flush out the old antifreeze because the old types and new types don't play together real well.
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