COOLING SYSTEM

OUTLINE

The cooling system uses a pressurized forced circulation system with a pressurized radiator reserve tank assembly.
The pressurized reservoir tank is used to prevent the engine coolant from deteriorating upon contact with external air.
A thermostat with a bypass valve is located on the water inlet housing to maintain suitable temperature distribution in the cooling system.
An aluminum radiator core is used for weight reduction.
A water-cooled type engine oil cooler is used.

Toyota Genuine Super Long Life Coolant (SLLC) is used.

Figure 1. Models without EGR Cooler

*1	Radiator Reserve Tank Assembly	*2	Radiator Assembly
*3	Turbocharger Sub-assembly	*4	Turbo Water Pipe Sub-assembly
*5	Water Inlet	*6	Thermostat
*7	Oil Cooler Assembly	*8	EGR Valve Adapter
*9	Electric EGR Control Valve Assembly	*10	Water Outlet

Figure 2. Models with EGR Cooler

*A	Models with Catalyst Support Control	-	-
*1	Radiator Reserve Tank Assembly	*2	Radiator Assembly
*3	Compressor Inlet Elbow	*4	Turbocharger Sub-assembly
*5	Turbo Water Pipe Sub-assembly	*6	Water Inlet
*7	Thermostat	*8	Oil Cooler Assembly
*9	Diesel Throttle Body Assembly	*10	No. 2 EGR Valve Assembly
*11	Electric EGR Control Valve Assembly	*12	No. 1 EGR Cooler
*13	No. 1 Injector Holder	*14	Water Outlet

SPECIFICATION

Engine Coolant

Engine Coolant Type		Toyota Genuine Super Long Life Coolant (SLLC) or similar high quality ethylene glycol based nonsilicate, non-amine, non-nitrite and non-borate coolant with long-life 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.
Maintenance Intervals	First Time	160000 km (100000 miles)
	Subsequent	Every 80000 km (50000 miles)
Color		Pink

Tech Tips

SLLC is pre-mixed (50% coolant and 50% deionized water).