Coolant Concentration Testing

TOOL REQUIRED
^ J 26568 or J 2368 Coolant Tester

1. Release the tip of the pump from Coolant Tester.





2. Insert the tip of the pump into the radiator filler neck.
^ Make sure the tip of the pump is below the level of the coolant.
3. Press and release the bulb to get a sample.
4. Insert the tip of the pump into the cover plate opening.
5. Press the bulb and allow a few drops to fall onto the measuring surface.
^ Do not open the plastic cover when taking a reading because water evaporation can change the readings.





6. Point Coolant Tester toward any light and look into the eyepiece.
^ Coolant protection reading is at the point where the dividing line between light and dark crosses the scale (antifreeze protection is the scale on the right).
^ Temperature scale is reversed from a standard thermometer scale.
^ Below zero readings are on the upper half of the scale.





^ If the readings are not clear, the measuring surface was not cleaned and dried properly. Wipe dry and take a new test.

WARNING: As long as there is pressure in the cooling system, the temperature can be considerably higher than the boiling temperature of the solution in the radiator without causing the solution to boil. Removal of the radiator cap while the engine is hot and pressure is high will cause the solution to boil instantaneously - possibly with explosive force - spewing the solution over engine, fenders, and person removing cap. Under come conditions, the ethylene glycol in engine coolant is combustible.