Changing Engine Coolant
Refer to [ CHANGING ENGINE COOLANT [QR25DE] ].
Scheme 20
Checking Radiator
Check radiator for mud or clogging. If necessary, clean radiator as follows.
| CAUTION | Be careful not to bend or damage the radiator fins. When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radiator shroud and horns. Then tape the harness and electrical connectors to prevent water from entering. |
- Apply water by hose to the back side of the radiator core vertically downward.
- Apply water again to all radiator core surfaces.
- Stop washing when dirt and debris no longer flow out from the radiator.
- Blow air into the back side of radiator core vertically downward. Use compressed air lower than 490 kPa (5 kg/cm 2 , 71 psi) and keep distance more than 30 cm (11.8 in).
- Blow air again into all the radiator core surfaces until no water sprays out.
- Check for leaks.
Scheme 21
Fan Coupling
Inspect fan coupling for oil leakage and bimetal conditions.
Scheme 22
Cooling Fan
Inspect cooling fan for crack or unusual bend.
- If anything is found, replace cooling fan.
RADIATOR
| Unit: kPa (kg/cm 2 , psi) | ||
|---|---|---|
| Cap relief pressure | Standard | 98 - 118 (0.99 - 1.20, 14- 17) |
| Leakage test pressure | 137 (1.4, 20) | |
RADIATOR SPECIFICATIONS
THERMOSTAT
| Valve opening temperature | 80.5 - 83.5°C (177 - 182°F) |
|---|---|
| Full-open lift amount | 8 mm/95°C (0.315 in/203°F) |
| Valve closing temperature | 77°C (171°F) |
THERMOSTAT SPECIFICATIONS
WATER CONTROL VALVE
| Valve opening temperature | 93.5 - 96.5°C (200 - 206°F) |
|---|---|
| Full-open lift amount | More than 8 mm/108°C (0.315 in/226°F) |
| Valve closing temperature | 90°C (194°F) or higher |
WATER CONTROL VALVE SPECIFICATIONS
Special Service Tool
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
SPECIAL SERVICE TOOL Tool number (Kent-Moore No.) Tool name Description KV10111100 (J-37228) Seal cutter Removing chain tensioner cover and water pump cover WS39930000 ( - ) Tube presser Pressing the tube of liquid gasket EG17650301 (J-33984-A) Radiator cap tester adapter Adapting radiator cap tester to radiator cap and radiator filler neck 28 (1.10) dia. 31.4 (1.236) dia. 41.3 (1.626) dia. Unit: mm (in) KV991J0070 (J-45695) Coolant refill tool Filling cooling system KV991J0010 (J-23688) Engine coolant refractometer Checking concentration of ethylene glycol in engine coolant
Scheme 23
Scheme 24
Scheme 25
Scheme 26
Scheme 27
Commercial Service Tool
COMMERCIAL SERVICE TOOL Tool name Description Power tool Loosening nuts and bolts Radiator cap tester Checking radiator and radiator cap
