radiator petcock on 05 merc mariner

mugsy

Forum Member
i need to replace antifreeze, but which direction do you open the petcock?its plastic and i broke one once before but i don't remeber which way to turn it, clokwise or counter clockwise.the haynes manual doesn't say.
 
Pull the lower radiator hose and run distilled water thru it a couple of times. Replenish system with antifreeze and coolant 60/40
 
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