Only one way to find a mystery coolant leak.

Go to one of the mass-marketer parts store..ie..Auto Zone, etc. and rent a cooling system pressure tester. Test is performed on a stone cold engine. The kit come with adapters that fit the radiator mouth. You hook the pump to the radiator and pump to say 15-17 lbs.

In a little bit you'll see coolant on the ground. You start chasing it in the opposite direction to the source.


Mike Murrell
'95 Rodeo - 3.2 liter - 2WD - Automatic
'04 Tacoma - 4 banger - Automatic