Reply to "Filling a completely dry coolant system"

bosswrenchMember

I suggest being careful pulling much vacuum on cooling systems. Simple waterpump seals do not work well in both directions and they're designed to hold about 25 psi positive but much less pressure negative. Panteras have trouble with their radiator cap fluid recovery systems that only operate at 3- 5 psi negative. You might find air in a system that results from pulling air in at the pump or the cap, if you pull too hard. Might be OK, but....

4/30/143:23 PM

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