Industrial 1.6L Engine Cooling 2-7
2. Insert the tip into the radiator filler neck. Insert
the tip below the level of the coolant.
3. Press and release the bulb in order to draw a
sample.
4. Bend the plastic tube around and insert the tip
into the cover plate opening.
5. Press the bulb and inject a few drops of the
coolant into the measuring surface. Do not open
the plastic cover when you take the readings
because water evaporation may change the
reading.
Reading the Tester
Coolant Concentration Testing
Hydrometer
Due to changes in commercially available antifreeze,
the use of a hydrometer may give an incorrect
reading. The hydrometer should be used to test an
ethylene glycol–based antifreeze only. Ethylene
glycol–based antifreeze is recommended for year
round use.
Coolant Tester
Use the coolant testers J 26568 with the Centigrade
scale or J 23688 with the Fahrenheit scale in order
to check the antifreeze protection of the coolant.
Make sure that the hydrometer markings are correct.
Unless J 26568 or J 23688 has a provision for
temperature correction, test the temperature at
which the coolant testers are calibrated. If the
coolant is warmer or colder, the reading may be
incorrect. Follow the manufacturer’s directions in
order to use the J 26568 or the J 23688.
Clean the coolant tester before each use with the
following procedure:
1. Swing back the plastic cover at the slanted end
of the tester in order to expose the measuring
window and the bottom of the plastic cover.
2. Wipe the coolant tester dry with a tissue or a
clean soft cloth.
3. Close the plastic cover.
Testing
Do not remove the clear plastic pump from the tester.
Use the following procedure to test the coolant:
1. Release the tip of the pump from the tester
housing.
• Point the tester toward any light source and
look into the eyepiece.
• The antifreeze protection reading is at the
point where the dividing line between the light
and the dark edge of the shadow crosses the
scale. The antifreeze protection is the right
scale and the battery charge is on the left.
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