

Adding coolant to the external reservoir only puts coolant back into the engine slowly, and that is only if there is no big leak in the engine cooling system. Adding coolant just to the coolant overflow tank won't protect your engine - you will have to add coolant directly to the radiator. There are some very important things to remember now: There is also the off chance that it might also be some other, different problem. A good mechanic should be able to diagnose this condition. This could give you the symptoms of no external leak but constant coolant loss. It is possible that before you bought the car or during one of your 'low coolant light' episodes, the engine could have overheated enough to slightly warp the cylinder head causing a small internal coolant leak. Repeat the procedure if necessary, until the fluid is nearly colorless.OK, you bought a used car with a cracked coolant overflow tank and probably a failing/leaking water pump.Follow the drain and fill procedure using only clean, drinkable water.Install the coolant recovery reservoir.


Is it safe to drive and is it a big deal? I put a gallon in. I put windshield washer fluid in my coolant tank.
