topping up coolant with water what is 50/50 measurement
Add pure antifreeze initially in a volume equal to the water remaining in the system, topping off with a 50/50 mix. â¢ Improper topping off. If you have a low coolant level, the first thing to do is add coolant; the second is find out where the coolant is going.Finding and fixing leaks is critical. When topping off, be consistent. Mix and mark a jug containing a 50/50 mix of compatible antifreeze and distilled or demineralized water.Then use that container for all top-offs.Too many systems get topped off with whatever is handy, commonly pure antifreeze, plain tap water, or...whatever is handy.ix and mark a jug containing a 50/50 mix of compatible antifreeze and distilled or demineralized water. Then use that container for all top-offs.Too many systems get topped off with whatever is handy, commonly pure antifreeze, plain tap water, or...whatever is handy.