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Which coolant/oil

Use distilled water. You don't want to change out your heater core if it becomes clogged from mineral deposits.
 
X2 on distilled... And use concentrate, yer gonna need 3.5 to 4 gallons of it...the total system capacity is somewhere around 28-30qts...:awesomework:
 
Ok, thanks again. The distilled water will be the stuff you can get at grocery stores? Also when I'm flushing the system is it ok to use tap water then? And where can I get some SCA treatment and test strips and how much SCA treatment will I need?
 
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