Coolant: Testing and Inspection

2UR-FSE COOLING: COOLING SYSTEM: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION

1. INSPECT FOR COOLANT LEAK
NOTICE:
Before each inspection, turn the A/C switch OFF.
CAUTION:
Do not remove the radiator reservoir cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.





(a) Fill the radiator with coolant and attach a radiator cap tester.
(b) Warm up the engine.
(c) Using the radiator cap tester, increase the pressure inside the radiator to 118 kPa (1.2 kgf/cm2, 17 psi), and check that the pressure does not drop.
If the pressure drops, check the hoses, radiator and water pump for leaks. If no external leaks are found, check the heater core, cylinder block and head.
2. INSPECT ENGINE COOLANT LEVEL IN RESERVOIR





(a) Check that the engine coolant level is between the LOW and FULL lines when the engine is cold.
If the engine coolant is below the LOW line, 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.
NOTICE:
Do not substitute plain water for engine coolant.
HINT: TOYOTA vehicles are filled with TOYOTA SLLC at the factory. In order to avoid damage to the engine cooling system and other technical problems, only use TOYOTA SLLC or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, non-borate coolant with long-life hybrid organic acid technology (coolant with long-life hybrid organic acid technology consists of a combination of low phosphates and organic acids).

3. INSPECT ENGINE COOLANT QUALITY
(a) Remove the radiator reservoir cap.
CAUTION:
Do not remove the radiator reservoir cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

(b) Check if there are any excessive deposits of rust or scales around the radiator cap and radiator filler hole. Also, the coolant should be free of oil.
If it is excessively dirty, clean the coolant passage and replace the coolant.
(c) Install the radiator reservoir cap.