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I recently installed an Aluminum Griffin radiator and was advised by the dealer to only use distilled water in the radiator.With the onset of winter I was wondering what type of antifreeze I should use in the radiator to prevent any damage to the aluminum.
 

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Jay is right, and yes, Distilled water is the way to go, Tap/Spring/Well water had lots of minerals/salt, ect that will promote corosion inside your cooling system. The only reason we change coolant is because the anti-corsion elements of the coolant breakdown after time, however, the ant-freeze elements will not breakdown. Make sure you follow that 50/50 ratio too. All coolant is just as bad as all water. :eek:
For extreme hot/cold protecton, I think a 70/30 is suggested, but check the coolant label to be sure.
 
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