Service manual

6-3
COOL
RADIATOR AND HEAT EXCHANGER
INSPECTION
1. Inspect:
• Coolant hoses
• Heat exchanger
• Oil cooler
• Coolant pipes
Cracks/damage
→
Replace.
2. Check:
• Radiator fins
Obstruction
→
Clean.
Apply compressed air to the rear of the radia-
tor.
Damage
→
Repair or replace.
NOTE:
_
Straighten any flattened fins with a thin, flat-head
screwdriver.
3. Check:
• Radiator fan (PZ50VT/PZ50MP)
Damage
→
Replace.
Malfunction
→
Check and repair.
4. Measure:
• Filler cap opening pressure
Cap opens with a pressure below the speci-
fied pressure
→
Replace.
Measurement steps:
• Attach the cooling system tester
1
to the cool-
ant filler cap
2
.
• Apply the specified pressure for 10 seconds
and make sure there is no pressure drop.
Filler cap opening pressure:
93.3 ~ 122.7 kPa
(0.93 ~ 1.23 kg/cm
2
, 13.2 ~ 17.5 psi)
Cooling system tester:
90890-01325, YU-24460-01
Adapter:
90890-01352, YU-33984