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Should the radiator be drained completely before removing thermostat?
Wiki User
∙ 16y ago
Not unless you really want to; some will run out when you remove the hose but just catch it in a pan and put it back when finished. Since the long life coolant is very expensive, drain the radiator halfway (or at least below the thermostat level) with a small pump into a clean bucket. It is important that the fluid remains clean, contaminants will ruin the internals of the coolant system over time. When completed put the coolant back in and bleed the system. Hope this helps. "G"
Wiki User
∙ 16y ago
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