CS4 coolant

The pump & compressor housing is made of aluminum so you probably want an anti freeze that is formulated for aluminum. Maybe contact GXPump & ask for recommendations.
Brass, plastic and who knows what the radiator is made out of. Just about all extended life universal coolant is silicate and phosphate free.
 
Brass, plastic and who knows what the radiator is made out of. Just about all extended life universal coolant is silicate and phosphate free.
All the stuff a car engine and radiator could be made of today that modern 50/50 mix is formulated not to harm a thing .. from cheap plastic to titanium.. lol 😜
 
Evey major auto parts chain carries their own rebranded, prestone, zerex etc. 12 bucks. I probably wouldn't use Death Cool as that is specific to GM and their stupid seals.

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