COOLING SYSTEM ON-VEHICLE INSPECTION

PROCEDURE

INSPECT FOR COOLANT LEAK
CAUTION:
- When engine assembly and radiator assembly is hot, do not remove the radiator cap sub-assembly.
- Fluid and steam may spray out due to high pressure, possibly resulting in burns.
1. Remove the radiator cap sub-assembly from the radiator assembly.
2. Fill the radiator reserve tank assembly with engine coolant, and then install a radiator cap tester.
3. Warm up the engine.
4. Pump the radiator cap tester to 137 kPa (1.4 kgf/cm², 20 psi), and then check that the pressure does not drop.
  - If the engine coolant level is low, perform engine coolant leak inspection, and fill new engine coolant.
  - If there are no signs of external engine coolant leaks, check the heater core, cylinder block sub-assembly and cylinder head sub-assembly.
5. Remove the radiator cap tester.
6. Install the radiator cap sub-assembly to the radiator assembly.
INSPECT ENGINE COOLANT LEVEL IN RESERVOIR
1. *a Full Line
  
  *b Low Line
  
  Check that the engine coolant level in the reserve tank is between the low line and full line when the engine is cold.
  
  Note
  
  Do not substitute plain water for engine coolant.
  
  If the engine coolant level is low, perform engine coolant leak inspection, and fill new engine coolant.
INSPECT ENGINE COOLANT QUALITY
CAUTION:
- When engine assembly and radiator assembly is hot, do not remove the radiator cap sub-assembly.
- Fluid and steam may spray out due to high pressure, possibly resulting in burns.
1. Remove the radiator cap sub-assembly from the radiator assembly.
2. Check that there are no excessive deposits of rust or scale around the radiator cap sub-assembly and engine coolant hole. Also, the engine coolant should be free of oil.
  
  If excessively dirty, clean the engine coolant passage and replace the engine coolant.
3. Install the radiator cap sub-assembly to the radiator assembly.

*a	Full Line
*b	Low Line