12. COOLING SYSTEM DINK50/ 125
COOLING SYSTEM TESTING
RADIATOR CAP INSPECTION
Removing the radiator cap while the
engine is hot can cause the coolant to
spray out, seriously scalding you.
Always let the engine and radiator cool
down before removing the radiator cap.
Remove the radiator cap (1).
Pressure test the radiator cap.
Replace the radiator cap if it does not hold
pressure, or if relief pressure is too high or Cap Tester
too low.
It must hold the specified pressure for at
least six seconds.
Before installing the cap in the tester,
wet the sealing surface.
Radiator Cap Relief Pressure: Radiator Cap
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, Cap Tester
14.9 psi).
Repair or replace components if the system
will not hold the specified pressure for at
least six seconds.
12-4
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