6. COOLING SYSTEM MXU 550EXi/MXU500i
COOLING SYSTEM TESTING
Cap Tester
RADIATOR CAP INSPECTION
Remove the radiator cap (refer to the
"COOLANT REPLACEMENT" section
in this chapter).
Pressure testing the radiator cap.
Replace the radiator cap if it does not hold Radiator Cap
pressure, or if relief pressure is too high or
too low.
It must hold the specified pressure for at
least six seconds.
Before installing the cap in the tester,
wet the sealing surface.
Cap Tester
Radiator Cap Relief Pressure:
90 kPa (0.9 kg/cm, 12.8 psi)
Pressurize the radiator, engine and hoses,
and check for leaks.
Excessive pressure can damage the
cooling system components.
Do not exceed 105 kPa (1.05 kg/cm,
14.9 psi).
Repair or replace components if the system
will not hold the specified pressure for at
least six seconds.
COOLANT REPLACEMENT
PREPARATION
The effectiveness of coolant decreases
with the accumulation of rest or if there is
a change in the mixing proportion during
usage. Therefore, for best performance
change the coolant regularly as specified
in he maintenance schedule.
Mix only distilled, low mineral water
with the antifreeze.
Recommended mixture:
1:1 (Distilled water and antifreeze)
6-5
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