Honda Hawk GT NT650 1988 Service Manual page 74

COOLING SYSTEM
SYSTEM TESTI NG
COOLANT MIXTURE
Remove the reserve tank cap.
Test the coolant mixture with an antifreeze tester.
For maximum corrosion protection, a 50-50% solution of
ethylene glycol and distilled water is recommended.
Remove the fuel tank (page 4-3).
Remove the radiator cap.
-'------------
Be sure the engine is cool before removing the cap or you may
be severely scalded.
RADIATOR CAP
Wet the radiator cap sealing surface, install the cap on the
tester, and apply pressure.
Replace the radiator cap if it does not hold pressure. or if it's
relief pressure is too high or too low. It must hold specified
pressure for at least six seconds.
RADIATOR CAP RELIEF PRESSURE:
88-127 kPa (0.9-1.3 kg/em', 13-18
psi)
SYSTEM PRESSURE TEST
Remove the fuel tank and radiator cap.
Attach the tester to the radiator and apply enough pressure to
test the radiator, engine and hoses. check for leaks.
CAUTION
Excessive pressure can damage the radiator. Do not exceed /25
kPa
(1.25
kglcm
1 , /8
psi)
Repair or replace components if the system will not hold speci-
fied pressure for at least six seconds.
5-2
(1)
COOLING SYSTEM TESTER
COMMERCIALLY AVAILABLE