OUTLINE
The cooling system is a pressurized, forced-circulation type.
A thermostat with a bypass valve is located in the water inlet housing to maintain a suitable temperature in the cooling system.
The flow of the water makes a U-turn in the cylinder block to ensure a smooth flow. In addition, a bypass passage is enclosed in the cylinder head and the cylinder block.
Warm water from the cylinder head is sent to the throttle body assembly to prevent freeze-up.
Toyota Genuine Super Long Life Coolant (SLLC) is used.
| *1 | Water Pump | - | - |
| *a | From Radiator | *b | To Radiator |
| *c | To Heater Core | *d | From Heater Core |
SPECIFICATION
Engine Coolant
Toyota Genuine SLLC is used. The maintenance intervals are as shown in the table below:
| Engine Coolant | Type | Toyota Genuine Super Long Life Coolant (SLLC) or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite and non-borate coolant with longlife hybrid organic acid technology (coolant with long-life hybrid organic acid technology is a combination of low phosphates and organic acids). Do not use plain water alone. | |
| Color | Pink | ||
| Maintenance Intervals | First Time | 160000 km (100000 miles) | |
| Subsequent | Every 80000 km (50000 miles) | ||
Tech Tips
SLLC is pre-mixed (50% coolant and 50% deionized water). Therefore, no dilution is needed when SLLC in the vehicle is added or replaced.
Thermostat
| Thermostat Opening Temperature | 80 °C to 84 °C (176 °F to 183 °F) |