Toyota Avalon (XX50): Radiator

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / A25a-fxs Cooling / Radiator

Components

COMPONENTS

ILLUSTRATION

*1	FRONT WHEEL OPENING EXTENSION PAD LH	*2	FRONT WHEEL OPENING EXTENSION PAD RH
*3	NO. 1 ENGINE UNDER COVER	-	-
	Nm (kgfcm, ft.*lbf): Specified torque	-	-

ILLUSTRATION

*A	Type A	*B	Type B
*1	NO. 2 ENGINE UNDER COVER ASSEMBLY	-	-
	Nm (kgfcm, ft.*lbf): Specified torque	-	-

ILLUSTRATION

*1	FRONT BUMPER ENERGY ABSORBER	*2	FRONT BUMPER REINFORCEMENT
*3	NO. 2 FRONT BUMPER ENERGY ABSORBER	-	-
	Nm (kgfcm, ft.*lbf): Specified torque	-	-

ILLUSTRATION

NO. 1 RADIATOR AIR GUIDE LH

NO. 1 RADIATOR AIR GUIDE RH

ILLUSTRATION

*1	HOOD LOCK ASSEMBLY	*2	INLET AIR CLEANER ASSEMBLY
*3	UPPER RADIATOR MOUNTING BRACKET	*4	UPPER RADIATOR SUPPORT SUB-ASSEMBLY
*5	HOOD LOCK NUT CAP	-	-
	Nm (kgfcm, ft.*lbf): Specified torque	●	Non-reusable part
	MP grease	-	-

ILLUSTRATION

*1	LOWER RADIATOR SUPPORT	*2	NO. 1 RADIATOR HOSE
*3	NO. 2 INVERTER COOLING HOSE	*4	NO. 2 RADIATOR HOSE
*5	NO. 3 INVERTER COOLING HOSE	*6	NO. 4 INVERTER COOLING HOSE
*7	NO. 5 INVERTER COOLING HOSE	*8	NO. 5 WATER BY-PASS HOSE
*9	NO. 6 WATER BY-PASS HOSE	*10	RADIATOR ASSEMBLY
*11	RADIATOR SUPPORT CUSHION	*12	FAN WITH MOTOR ASSEMBLY

Installation

INSTALLATION

PROCEDURE

1. INSTALL LOWER RADIATOR SUPPORT

(a) Install the 2 lower radiator supports to the radiator assembly.

2. INSTALL RADIATOR SUPPORT CUSHION

(a) Install the 2 radiator support cushions to the radiator assembly.

3. INSTALL RADIATOR ASSEMBLY

(a) Engage the 2 guides.

(b) Engage the 2 claws to install the fan with motor assembly to the radiator assembly.

NOTICE:

Do not damage the radiator assembly when installing the fan with motor assembly.

NOTICE:

Do not apply excessive force to the cooler condenser assembly or pipe when installing the radiator assembly with the fan with motor assembly.

(d) Engage the 2 guides.

(e) Engage the 2 claws to install the cooler condenser assembly to the radiator assembly.

NOTICE:

Make sure not to damage the cooler condenser assembly when installing the cooler condenser assembly.

(f) Engage the wire harness clamp.

(g) Connect the cooling fan motor connector and rotate the lever to lock it.

NOTICE:

When connecting the cooling fan motor connector, make sure that the connecting parts of the cooling fan motor connector are free of dirt, water or other foreign matter.
Be sure to securely connect the cooling fan motor connector.

(h) Engage the wire harness clamp.

(i) Connect the cooling fan motor connector.

(j) Engage the 4 clamps to connect the wire harness to the fan with motor assembly.

4. INSTALL NO. 3 INVERTER COOLING HOSE

(a) Install the No. 3 inverter cooling hose to the radiator assembly and slide the clip to secure it.

(b) Engage the clamp to connect the No. 3 inverter cooling hose to the fan with motor assembly.

5. CONNECT NO. 2 RADIATOR HOSE

(a) Connect the No. 2 radiator hose to the radiator assembly and slide the clip to secure it.

(b) Engage the clamp to connect the No. 2 radiator hose to the fan with motor assembly.

6. CONNECT NO. 2 INVERTER COOLING HOSE

(a) Engage the clamp and connect the No. 2 inverter cooling hose to the fan with motor assembly.

7. CONNECT NO. 5 INVERTER COOLING HOSE

(a) Engage the 2 clamps and connect the No. 5 inverter cooling hose to the fan with motor assembly.

8. CONNECT NO. 4 INVERTER COOLING HOSE

(a) Connect the No. 4 inverter cooling hose to the radiator assembly and slide the clip to secure it.

9. CONNECT NO. 1 RADIATOR HOSE

(a) Connect the No. 1 radiator hose to the radiator assembly and slide the clip to secure it.

(b) Engage the clamp to connect the No. 1 radiator hose to the fan with motor assembly.

10. CONNECT NO. 6 WATER BY-PASS HOSE

(a) Connect the No. 6 water by-pass hose to the radiator assembly.

11. CONNECT NO. 5 WATER BY-PASS HOSE

(a) Connect the No. 5 water by-pass hose to the radiator assembly and slide the clip to secure it.

12. INSTALL UPPER RADIATOR SUPPORT SUB-ASSEMBLY

(a) Install the upper radiator support sub-assembly with the 4 bolts.

Torque:

12.5 N·m {127 kgf·cm, 9 ft·lbf}

(b) Engage the clamp to connect the hood lock control cable assembly to the upper radiator support sub-assembly.

13. INSTALL NO. 1 RADIATOR AIR GUIDE RH

(a) Engage the guide and claw.

(b) Install the No. 1 radiator air guide RH with the clip.

14. INSTALL NO. 1 RADIATOR AIR GUIDE LH

(a) Engage the guide and claw.

(b) Install the No. 1 radiator air guide LH with the clip.

15. INSTALL UPPER RADIATOR MOUNTING BRACKET

(a) Install the 2 upper radiator mounting brackets with the 2 bolts and 2 nuts.

Torque:

12.5 N·m {127 kgf·cm, 9 ft·lbf}

(b) Connect the 2 horn connectors.

16. INSTALL INLET AIR CLEANER ASSEMBLY

Click here

17. INSTALL HOOD LOCK ASSEMBLY

Click here

18. INSTALL RADIATOR SHUTTER SUB-ASSEMBLY

Click here

19. INSTALL FRONT BUMPER REINFORCEMENT

Click here

20. INSTALL FRONT BUMPER ENERGY ABSORBER

Click here

21. INSTALL NO. 2 FRONT BUMPER ENERGY ABSORBER

Click here

22. INSTALL HEADLIGHT ASSEMBLY

Click here

23. INSTALL INVERTER WATER PUMP ASSEMBLY

Click here

24. ADD ENGINE COOLANT (for Engine)

Click here

25. INSPECT FOR COOLANT LEAK (for Engine)

Click here

26. INSTALL NO. 2 ENGINE UNDER COVER ASSEMBLY

Click here

27. INSTALL NO. 1 ENGINE UNDER COVER

Click here

28. INSTALL FRONT WHEEL OPENING EXTENSION PAD RH

Click here

29. INSTALL FRONT WHEEL OPENING EXTENSION PAD LH

Click here

On-vehicle Inspection

ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:

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

PROCEDURE

1. CHECK RADIATOR CAP SUB-ASSEMBLY

CAUTION:

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

(a) Measure the valve opening pressure.

*a	Rubber Packing (1)
*b	Rubber Packing (2)
*c	Rubber Packing (3)
*d	Valve Seat

(1) If there are water stains or foreign matter on the rubber packing (1), (2) or (3), clean the part(s) with water and finger scouring.

(2) Check that the rubber packings (1), (2) and (3) are not deformed, cracked or swollen.

(3) Check that the rubber packing (3) and valve seat are not stuck together.

(4) Apply engine coolant to the rubber packings (2) and (3) before using a radiator cap tester.

(5) When using the radiator cap tester, tilt it upward 30° or more.

*1	Radiator Cap Sub-assembly
*a	Radiator Cap Tester
*b	30° or more

(6) Pump the radiator cap tester several times, and check the maximum pressure.

Pumping Speed:

1 pump per second

Item	Specified Condition
Standard pressure (for brand-new radiator cap sub-assembly)	74 to 103 kPa (0.8 to 1.1 kgf/cm2, 10.7 to 14.9 psi)
Minimum pressure (for used radiator cap sub-assembly)	59 kPa (0.6 kgf/cm2, 8.6 psi)

Item

Specified Condition

Standard pressure

(for brand-new radiator cap sub-assembly)

74 to 103 kPa (0.8 to 1.1 kgf/cm2, 10.7 to 14.9 psi)

Minimum pressure

(for used radiator cap sub-assembly)

59 kPa (0.6 kgf/cm2, 8.6 psi)

HINT:

Even if the radiator cap sub-assembly cannot maintain the maximum pressure, it is not a defect.

If the maximum pressure is less than the minimum pressure, replace the radiator cap sub-assembly.

2. CHECK RADIATOR ASSEMBLY FOR CLOGGING

CAUTION:

To prevent burns, do not touch the engine or other high temperature components while the engine is hot.

(a) Remove the cool air intake duct seal.

Click here

(b) Remove the inlet air cleaner assembly.

Click here

(c) Shine an electric light at the radiator assembly and cooler condenser assembly from the front of the cooler condenser assembly and check the radiator assembly for clogging using a mirror.

*a	OK	*b	NG
*c	Electric Light	*d	Mirror
*e	Areas to be checked	-	-

OK:

The radiator assembly is not clogged.

If the radiator assembly is clogged, clean it.

(d) Install the inlet air cleaner assembly.

Click here

(e) Install the cool air intake duct seal.

Click here

3. CLEAN RADIATOR ASSEMBLY

CAUTION:

To prevent burns, do not touch the engine or other high temperature components while the engine is hot.

(a) Remove the cool air intake duct seal.

Click here

(b) Remove the inlet air cleaner assembly.

Click here

(d) Clean the cooler condenser assembly.

(1) Check that the washer nozzle is not clogged.

(2) Insert the washer nozzle into the space in front of the cooler condenser assembly and spray it.

NOTICE:

Clean the fins of the cooler condenser assembly by spraying the entire area for 150 seconds. Repeat this process twice.
Set the air pressure to 0.4 MPa (4.1 kgf/cm2, 58 psi).
Check that water sprays in mist form from the nozzle.
Keep the nozzle parallel to the cooler condenser assembly.
Do not allow the nozzle to contact the fins of the cooler condenser assembly.
Keep the nozzle moving while spraying water.
Do not spray the cooler compressor assembly or generator assembly excessively.

(3) Leave the cooler condenser assembly as is for 10 minutes to let the water penetrate the dirt.

(4) Clean the cooler condenser assembly again.

NOTICE:

Clean the fins of the cooler condenser assembly by spraying the entire area for 150 seconds. Repeat this process 4 times.
Set the air pressure to 0.4 MPa (4.1 kgf/cm2, 58 psi).
Check that water sprays in mist form from the nozzle.
Keep the nozzle parallel to the cooler condenser assembly.
Do not allow the nozzle to contact the fins of the cooler condenser assembly.
Keep the nozzle moving while spraying water.
Do not spray the cooler compressor assembly or generator assembly excessively.

(5) Using an air blow gun, dry the cooler condenser assembly for 3 minutes.

(e) Disconnect the cooling fan motor connector.

(f) Disengage the wire harness clamp.

(g) Rotate the lever while pushing the lock, and disconnect the cooling fan motor connector.

NOTICE:

After disconnecting the cooling fan motor connector, make sure that dirt, water or other foreign matter does not contact the connecting parts of the cooling fan motor connector.

(h) Disengage the wire harness clamp.

(i) Disengage the 2 claws and separate the fan with motor assembly from the radiator assembly.

(j) Clean the radiator assembly.

(1) Insert the washer nozzle between the radiator assembly and fan with motor assembly and spray the radiator assembly.

NOTICE:

Clean the fins of the radiator assembly by spraying the entire area for 150 seconds. Repeat this process twice.
Set the air pressure to 0.4 MPa (4.1 kgf/cm2, 58 psi).
Check that water sprays in mist form from the nozzle.
Keep the nozzle parallel to the radiator assembly.
Do not allow the nozzle to contact the fins of the radiator assembly.
Keep the nozzle moving while spraying water.

(2) Leave the radiator assembly as is for 10 minutes to let the water penetrate the dirt.

(3) Clean the radiator assembly again.

NOTICE:

Clean the fins of the radiator assembly by spraying the entire area for 150 seconds. Repeat this process 4 times.
Set the air pressure to 0.4 MPa (4.1 kgf/cm2, 58 psi).
Check that water sprays in mist form from the nozzle.
Keep the nozzle parallel to the radiator assembly.
Do not allow the nozzle to contact the fins of the radiator assembly.
Keep the nozzle moving while spraying water.

(4) Using an air blow gun, dry the radiator assembly for 3 minutes.

(k) Check the fins of the radiator assembly for clogs again.

If the radiator assembly is clogged, clean the cooler condenser assembly and radiator assembly again.

(l) Check that the 2 guides at the bottom are engaged to the radiator assembly.

(m) Engage the 2 claws to install the fan with motor assembly to the radiator assembly.

(n) Engage the wire harness clamp.

(o) Connect the cooling fan motor connector and rotate the lever to lock it.

NOTICE:

When connecting the cooling fan motor connector, make sure that the connecting parts of the cooling fan motor connector are free of dirt, water or other foreign matter.
Be sure to securely connect the cooling fan motor connector.

(p) Engage the wire harness clamp.

(q) Connect the cooling fan motor connector.

(r) Remove the piece of cloth from the opening of each air duct.

(s) Install the inlet air cleaner assembly.

Click here

(t) Install the cool air intake duct seal.

Click here

Removal

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during radiator assembly removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed	Link
*: Applies only for when removing and installing or replacing the television camera assembly.
Front television camera assembly, front bumper assembly or radiator grille	Television camera view adjustment Television camera assembly optical axis adjustment (Back camera position setting)*	Panoramic view monitor system	for Initialization for Calibration
Front bumper assembly	Measurement of ultrasonic sensor detection angle Ultrasonic sensor detection angle registration	Intelligent clearance sonar system Intuitive parking assist system
Headlight assembly LH Headlight ECU sub-assembly LH	Synchronize the vehicle information	Lighting system (for HV Model with Cornering Light)
Swing grill actuator assembly Radiator shutter sub-assembly	Change grille shutter control mode and/or perform initialization	Grille shutter system

PROCEDURE

1. REMOVE FRONT WHEEL OPENING EXTENSION PAD LH

Click here

2. REMOVE FRONT WHEEL OPENING EXTENSION PAD RH

Click here

3. REMOVE NO. 1 ENGINE UNDER COVER

Click here

4. REMOVE NO. 2 ENGINE UNDER COVER ASSEMBLY

Click here

5. DRAIN ENGINE COOLANT (for Engine)

Click here

6. REMOVE INVERTER WATER PUMP ASSEMBLY

Click here

7. REMOVE HEADLIGHT ASSEMBLY

Click here

8. REMOVE NO. 2 FRONT BUMPER ENERGY ABSORBER

Click here

9. REMOVE FRONT BUMPER ENERGY ABSORBER

Click here

10. REMOVE FRONT BUMPER REINFORCEMENT

Click here

11. REMOVE RADIATOR SHUTTER SUB-ASSEMBLY

Click here

12. REMOVE HOOD LOCK ASSEMBLY

Click here

13. REMOVE INLET AIR CLEANER ASSEMBLY

Click here

14. REMOVE UPPER RADIATOR MOUNTING BRACKET

(a) Disconnect the 2 horn connectors.

(b) Remove the 2 bolts, 2 nuts and 2 upper radiator mounting brackets.

15. REMOVE NO. 1 RADIATOR AIR GUIDE LH

(a) Remove the clip and disengage the claw.

(b) Disengage the guide to remove the No. 1 radiator air guide LH.

16. REMOVE NO. 1 RADIATOR AIR GUIDE RH

(a) Remove the clip and disengage the claw.

(b) Disengage the guide to remove the No. 1 radiator air guide RH.

17. REMOVE UPPER RADIATOR SUPPORT SUB-ASSEMBLY

(a) Disengage the clamp to disconnect the hood lock control cable assembly from the upper radiator support sub-assembly.

(b) Remove the 4 bolts and upper radiator support sub-assembly.

18. DISCONNECT NO. 5 WATER BY-PASS HOSE

(a) Slide the clip and disconnect the No. 5 water by-pass hose from the radiator assembly.

19. DISCONNECT NO. 6 WATER BY-PASS HOSE

(a) Disconnect the No. 6 water by-pass hose from the radiator assembly.

20. DISCONNECT NO. 1 RADIATOR HOSE

(a) Disengage the clamp and disconnect the No. 1 radiator hose from the fan with motor assembly.

(b) Slide the clip and disconnect the No. 1 radiator hose from the radiator assembly.

21. DISCONNECT NO. 4 INVERTER COOLING HOSE

(a) Slide the clip and disconnect the No. 4 inverter cooling hose from the radiator assembly.

22. DISCONNECT NO. 5 INVERTER COOLING HOSE

(a) Disengage the 2 clamps and disconnect the No. 5 inverter cooling hose from the fan with motor assembly.

23. DISCONNECT NO. 2 INVERTER COOLING HOSE

(a) Disengage the clamp and disconnect the No. 2 inverter cooling hose from the fan with motor assembly.

24. DISCONNECT NO. 2 RADIATOR HOSE

(a) Disengage the clamp and disconnect the No. 2 radiator hose from the fan with motor assembly.

(b) Slide the clip and disconnect the No. 2 radiator hose from the radiator assembly.

25. REMOVE NO. 3 INVERTER COOLING HOSE

(a) Disengage the clamp and disconnect the No. 3 inverter cooling hose from the fan fan with motor assembly.

(b) Slide the clip and remove the No. 3 inverter cooling hose from the radiator assembly.

26. REMOVE RADIATOR ASSEMBLY

(a) Disengage the 4 clamps to disconnect the wire harness from the fan with motor assembly.

(b) Disconnect the cooling fan motor connector.

(d) Rotate the lever while pushing the lock, and disconnect the cooling fan motor connector.

NOTICE:

After disconnecting the cooling fan motor connector, make sure that dirt, water or other foreign matter does not contact the connecting parts of the cooling fan motor connector.

(e) Disengage the wire harness clamp.

(f) Disengage the 2 claws.

(g) Disengage the 2 guides to separate the cooler condenser assembly from the radiator assembly.

NOTICE:

Make sure not to damage the cooler condenser assembly when separating the cooler condenser assembly.

(h) Remove the radiator assembly with the fan with motor assembly from the vehicle body.

NOTICE:

Do not apply excessive force to the cooler condenser assembly or pipe when removing the radiator assembly with the fan with motor assembly.

(i) Disengage the 2 claws.

(j) Disengage the 2 guides to remove the fan with motor assembly from the radiator assembly.

NOTICE:

Do not damage the radiator assembly when removing the fan with motor assembly.

27. REMOVE RADIATOR SUPPORT CUSHION

(a) Remove the 2 radiator support cushions from the radiator assembly.

28. REMOVE LOWER RADIATOR SUPPORT

(a) Remove the 2 lower radiator supports from the radiator assembly.

Flow Shutting Valve

Thermostat

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