Coolant: Testing and Inspection

2AZ-FXE COOLING: COOLING SYSTEM: ON-VEHICLE INSPECTION

1. INSPECT FOR COOLANT LEAK (for Engine)

CAUTION:
Do not remove the reserve tank cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

NOTICE:
Before performing each inspection, turn the A/C switch off.

(a) Remove the reserve tank cap.

(b) Fill the radiator and reserve tank with coolant, and then attach a radiator cap tester.





(c) Put the engine in inspection mode Component Tests and General Diagnostics.

(d) Warm up the engine.

(e) Using the radiator cap tester, increase the pressure inside the radiator to 108 kPa (1.1 kgf/cm2, 16 psi), and check that the pressure does not drop. If the pressure drops, check the hoses, radiator, front exhaust pipe assembly and the heater hose around and water pump for leaks. If no external leaks are found, check the heater core, cylinder block and cylinder head.

(f) Remove the radiator cap tester.

(g) Install the reserve tank cap.

2. INSPECT RESERVOIR TANK ENGINE COOLANT LEVEL (for Engine)

(a) Check that the engine coolant level is between the low and full lines when the engine is cold.





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HINT
If the engine coolant level is low, check for leaks and add "TOYOTA Super Long Life Coolant" or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite and non-borate coolant with long-life hybrid organic acid technology to the full line.

3. INSPECT ENGINE COOLANT QUALITY (for Engine)

CAUTION:
Do not remove the reserve tank cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

NOTICE:
Before performing each inspection, turn the A/C switch off.

(a) Remove the reserve tank cap.

(b) Check if there are any excessive deposits of rust or scales around the reserve tank cap and reserve tank filler hole. Also, the coolant should be free of oil.

If excessively dirty, clean the coolant passage and replace the coolant.

(c) Install the reserve tank cap.