REPLACEMENT

CAUTION / NOTICE / HINT

CAUTION:

Do not remove the radiator cap sub-assembly or radiator drain cock plug while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

PROCEDURE

1. DRAIN ENGINE COOLANT (for Engine)

CAUTION:

Do not remove the radiator cap sub-assembly or radiator drain cock plug while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

(a) Remove the 3 clips and 2 bolts.

(b) Pull down the No. 1 engine under cover assembly.

NOTICE:

Do not damage the No. 1 engine under cover assembly.

(c) Connect a hose with an inside diameter of 9 mm (0.354 in.) to the radiator drain cock as shown in the illustration.

*a Hose

(d) Loosen the radiator drain cock plug.

*1 Radiator Cap Sub-assembly *2 Radiator Drain Cock Plug

(e) Remove the radiator cap sub-assembly. Then drain the engine coolant.

HINT:

Collect the engine coolant in a container and dispose of it according to the regulations in your area.

(f) Tighten the radiator drain cock plug by hand.

(g) Disconnect the hose from the radiator drain cock.

(h) Install the 3 clips.

(i) Install the 2 bolts.

Torque:

7.5 N·m {76 kgf·cm, 66 in·lbf}

2. ADD ENGINE COOLANT (for Engine)

(a) Slowly fill the radiator assembly with engine coolant.

Standard Capacity:

5.5 liters (5.8 US qts, 4.8 Imp. qts)

NOTICE:

Do not substitute plain water for engine coolant.

HINT:

TOYOTA vehicles are filled with TOYOTA SLLC at the factory. In order to avoid damaging 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 is a combination of low phosphates and organic acids).

(b) Squeeze the No. 1 radiator hose and No. 2 radiator hose several times by hand, and then check the level of the engine coolant.

If the engine coolant level is low, add engine coolant.

(c) Remove the reserve tank cap. [*1]

(d) Slowly pour engine coolant into the radiator reserve tank assembly until it reaches the MAX line. [*2] NOTICE: Do not substitute plain water for engine coolant.

*a MAX Line *b MIN Line

(e) Install the reserve tank cap. [*3]

(f) Install the radiator cap sub-assembly.

NOTICE:

Securely tighten the radiator cap sub-assembly.

(g) Put the engine in inspection mode (maintenance mode). [*4]

(1) Connect the GTS to the DLC3.

(2) Turn the ignition switch to ON (IG).

(3) Turn the GTS on.

(4) Enter following menus: Powertrain / Hybrid Control / Utility / Inspection Mode.

Powertrain > Hybrid Control > Utility

(h) Bleed air from the cooling system. [*5]

(1) Warm up the engine until the water inlet with thermostat sub-assembly opens. While the water inlet with thermostat sub-assembly is open, circulate the engine coolant for several minutes.

HINT:

The water inlet with thermostat sub-assembly open timing can be confirmed by squeezing the No. 2 radiator hose by hand, and sensing vibrations when the engine coolant starts to flow inside the No. 2 radiator hose.

(2) Squeeze the No. 1 radiator hose and No. 2 radiator hose several times by hand to bleed air from the system.

CAUTION:

When squeezing the No. 1 radiator hose and No. 2 radiator hose:

(i) Wait until the engine coolant cools down. [*6]

(j) Check that the engine coolant level is between the MAX line and MIN line. [*7]

3. INSPECT FOR COOLANT LEAK (for Engine)

Click here