Toyota Avalon (XX50): Oil Cooler

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Drivetrain / Ua80e Automatic Transmission / Transaxle / Oil Cooler

Components

COMPONENTS

ILLUSTRATION

*A	Type A	*B	Type B
*1	FRONT FENDER APRON SEAL LH	*2	FRONT WHEEL OPENING EXTENSION PAD LH
*3	FRONT WHEEL OPENING EXTENSION PAD RH	*4	NO. 1 ENGINE UNDER COVER
*5	REAR ENGINE UNDER COVER LH	-	-
	Nm (kgfcm, ft.*lbf): Specified torque	-	-

ILLUSTRATION

*1	BATTERY CLAMP SUB-ASSEMBLY	-	-
	Nm (kgfcm, ft.*lbf): Specified torque	-	-

ILLUSTRATION

*1	OUTLET NO. 1 OIL COOLER HOSE	*2	INLET NO. 1 OIL COOLER HOSE
*3	NO. 1 OIL COOLER TUBE SUB-ASSEMBLY WITHOUT HOSE	*4	INLET NO. 2 OIL COOLER HOSE
*5	OUTLET NO. 2 OIL COOLER HOSE	*6	NO. 1 WATER BY-PASS HOSE
*7	WATER BY-PASS HOSE ASSEMBLY	*8	TRANSMISSION OIL COOLER
*9	TRANSMISSION BREATHER CLAMP	-	-
	Nm (kgfcm, ft.*lbf): Specified torque	-	-

Installation

INSTALLATION

PROCEDURE

1. INSTALL TRANSMISSION OIL COOLER

(a) Engage the hook and temporarily install the transmission oil cooler to the automatic transaxle case sub-assembly with the bolt (A).

(b) Install the bolt (B).

Torque:

13.5 N·m {138 kgf·cm, 10 ft·lbf}

Torque:

13.5 N·m {138 kgf·cm, 10 ft·lbf}

(d) Fully tighten the bolt (A) to install the transmission oil cooler.

Torque:

13.5 N·m {138 kgf·cm, 10 ft·lbf}

2. CONNECT WATER BY-PASS HOSE ASSEMBLY

(a) Connect the water by-pass hose assembly to the transmission oil cooler and slide the clip to secure it.

*a	2 to 7 mm (0.0787 to 0.276 in.)	*b	Paint Mark
*c	45° (Claw of Clip Location)	-	-

NOTICE:

Make sure to slide the water by-pass hose assembly until it contacts the hose stopper of the transmission oil cooler.
Make sure to align the paint mark of the water by-pass hose assembly with the paint mark of the transmission oil cooler.
Make sure that the claws of the clip are within the location shown in the illustration.

3. CONNECT NO. 1 WATER BY-PASS HOSE

(a) Connect the No. 1 water by-pass hose to the transmission oil cooler and slide the clip to secure it.

*a	2 to 7 mm (0.0787 to 0.276 in.)	*b	Paint Mark
*c	45° (Claw of Clip Location)	-	-

NOTICE:

Make sure to slide the No. 1 water by-pass hose until it contacts the hose stopper of the transmission oil cooler.
Make sure to align the paint mark of the No. 1 water by-pass hose with the paint mark of the transmission oil cooler.
Make sure that the claws of the clip are within the location shown in the illustration.

(b) Engage the 3 clamps to install the transmission breather clamp.

4. INSTALL NO. 1 OIL COOLER TUBE SUB-ASSEMBLY WITHOUT HOSE

(a) Install the inlet No. 1 oil cooler hose, inlet No. 2 oil cooler hose, outlet No. 1 oil cooler hose and outlet No. 2 oil cooler hose to the No. 1 oil cooler tube sub-assembly without hose and slide the 4 clips to secure them.

*1	No. 1 Oil Cooler Tube Sub-assembly without Hose	*2	Inlet No. 1 Oil Cooler Hose
*3	Inlet No. 2 Oil Cooler Hose	*4	Outlet No. 1 Oil Cooler Hose
*5	Outlet No. 2 Oil Cooler Hose	-	-
*a	2 to 7 mm (0.0787 to 0.276 in.)	*b	45° (Claw of Clip Location)
*c	0 to 3 mm (0 to 0.118 in.)	-	-

NOTICE:

Make sure to slide the inlet No. 1 oil cooler hose, inlet No. 2 oil cooler hose, outlet No. 1 oil cooler hose and outlet No. 2 oil cooler hose until each contacts the hose stopper of the No. 1 oil cooler tube sub-assembly without hose.
Make sure that the claws of each clip are within the location shown in the illustration.

(b) Connect the outlet No. 2 oil cooler hose to the transmission oil cooler and slide the clip to secure it.

NOTICE:

Make sure to slide the outlet No. 2 oil cooler hose until it contacts the hose stopper of the transmission oil cooler.
Make sure to align the paint mark of the outlet No. 2 oil cooler hose with paint mark of the transmission oil cooler.
Make sure that the claws of the clip are within the location shown in the illustration.

*a	0 to 3 mm (0 to 0.118 in.)
*b	2 to 7 mm (0.0787 to 0.276 in.)
*c	Paint Mark
*d	45° (Claw of Clip Location)

NOTICE:

Make sure to slide the inlet No. 2 oil cooler hose until it contacts the hose stopper of the transmission oil cooler.
Make sure to align the paint mark of the inlet No. 2 oil cooler hose with the paint mark of the transmission oil cooler.
Make sure that the claws of the clip are within the location shown in the illustration.

*a	0 to 3 mm (0 to 0.118 in.)
*b	2 to 7 mm (0.0787 to 0.276 in.)
*c	Paint Mark
*d	45° (Claw of Clip Location)

(d) Temporarily install the No. 1 oil cooler tube sub-assembly without hose to the automatic transaxle case sub-assembly with the 2 bolts.

*a	Bolt (A)
*b	Bolt (B)

(e) Tighten the 2 bolts.

Torque:

Bolt (A) :

13.5 N·m {138 kgf·cm, 10 ft·lbf}

Bolt (B) :

28 N·m {286 kgf·cm, 21 ft·lbf}

HINT:

Tightening order: Fully tighten bolt (A) → Fully tighten bolt (B)

5. CONNECT INLET NO. 1 OIL COOLER HOSE

(a) Connect the inlet No. 1 oil cooler hose to the No. 1 oil cooler outlet tube sub-assembly and slide the clip to secure it.

NOTICE:

Make sure to slide the inlet No. 1 oil cooler hose until it contacts the hose stopper of the No. 1 oil cooler outlet tube sub-assembly.

*a	0 to 3 mm (0 to 0.118 in.)
*b	2 to 7 mm (0.0787 to 0.276 in.)

6. CONNECT OUTLET NO. 1 OIL COOLER HOSE

(a) Connect the outlet No. 1 oil cooler hose to the oil cooler union sub-assembly and slide the clip to secure it.

NOTICE:

Make sure to slide the outlet No. 1 oil cooler hose until it contacts the hose stopper of the oil cooler union sub-assembly.
Make sure that the paint mark of the outlet No. 1 oil cooler hose is within the location shown in the illustration.

*a	0 to 3 mm (0 to 0.118 in.)
*b	2 to 7 mm (0.0787 to 0.276 in.)
*c	Paint Mark (Left Side of Vehicle)
*d	30° (Paint Mark Location)

7. INSTALL BATTERY CLAMP SUB-ASSEMBLY

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8. INSTALL ECM

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9. INSTALL BATTERY

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10. ADD ENGINE COOLANT

Click here

11. ADJUST AUTOMATIC TRANSAXLE FLUID

Click here

12. INSPECT FOR OIL LEAK

13. INSPECT FOR COOLANT LEAK

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14. INSTALL FRONT FENDER APRON SEAL LH

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15. INSTALL REAR ENGINE UNDER COVER LH

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16. INSTALL NO. 1 ENGINE UNDER COVER

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17. INSTALL FRONT WHEEL OPENING EXTENSION PAD LH

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18. INSTALL FRONT WHEEL OPENING EXTENSION PAD RH

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19. INSTALL FRONT WHEEL LH

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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 transmission oil cooler removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed	Link
Battery terminal is disconnected/reconnected	Perform steering sensor zero point calibration	Lane Departure Alert System (w/ Steering Control)
		Pre-collision System
		Intelligent Clearance Sonar System*1
		Lighting System (for Gasoline Model with Cornering Light)
	Memorize steering angle neutral point	Parking Assist Monitor System
	Memorize steering angle neutral point	Panoramic View Monitor System
Replacement of ECM	Vehicle Identification Number (VIN) registration	MIL comes on
Replacement of ECM	ECU communication ID registration (Immobiliser system)	Engine start function
Replacement of ECM (If transaxle compensation code read from ECM)	Perform reset memory*2 Transfer transaxle compensation code Perform road test to allow ECM to learn	Large shift shock Deterioration of fuel efficiency	for Initialization for Registration
Replacement of ECM (If transaxle compensation code not read from ECM)	Perform reset memory*2 Reset transaxle compensation code Perform road test to allow ECM to learn	Large shift shock Deterioration of fuel efficiency	for Initialization for Registration
Replacement of ECM	Code registration (Smart key System (for Start Function))	Wireless Door Lock Control System Smart Key System (for Entry Function) Smart Key System (for Start Function) Steering lock function
Replacement of automatic transaxle fluid	ATF thermal degradation estimate reset	The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly

*1: When performing learning using the Techstream.
Click here
*2: Not necessary when ECM replaced with new one

PROCEDURE

1. REMOVE BATTERY

Click here

2. REMOVE ECM

Click here

3. REMOVE BATTERY CLAMP SUB-ASSEMBLY

Click here

4. REMOVE FRONT WHEEL LH

Click here

5. REMOVE FRONT WHEEL OPENING EXTENSION PAD LH

Click here

6. REMOVE FRONT WHEEL OPENING EXTENSION PAD RH

Click here

7. REMOVE NO. 1 ENGINE UNDER COVER

Click here

8. REMOVE REAR ENGINE UNDER COVER LH

Click here

9. REMOVE FRONT FENDER APRON SEAL LH

Click here

10. DRAIN ENGINE COOLANT

Click here

11. DRAIN AUTOMATIC TRANSAXLE FLUID

Click here

12. DISCONNECT OUTLET NO. 1 OIL COOLER HOSE

(a) Slide the clip and disconnect the outlet No. 1 oil cooler hose from the oil cooler union sub-assembly.

HINT:

Use a container to catch any automatic transaxle fluid which flows out of the outlet No. 1 oil cooler hose and oil cooler union sub-assembly.

13. DISCONNECT INLET NO. 1 OIL COOLER HOSE

(a) Slide the clip and disconnect the inlet No. 1 oil cooler hose from the No. 1 oil cooler outlet tube sub-assembly.

HINT:

Use a container to catch any automatic transaxle fluid which flows out of the inlet No. 1 oil cooler hose and No. 1 oil cooler outlet tube sub-assembly.

14. REMOVE NO. 1 OIL COOLER TUBE SUB-ASSEMBLY WITHOUT HOSE

(a) Remove the 2 bolts to disconnect the No. 1 oil cooler tube sub-assembly without hose from the automatic transaxle case sub-assembly.

(b) Slide the clip and disconnect the inlet No. 2 oil cooler hose from the transmission oil cooler.

HINT:

Use a container to catch any automatic transaxle fluid which flows out of the inlet No. 2 oil cooler hose and transmission oil cooler.

(c) Slide the clip and disconnect the outlet No. 2 oil cooler hose to remove the No. 1 oil cooler tube sub-assembly without hose from the transmission oil cooler.

HINT:

Use a container to catch any automatic transaxle fluid which flows out of the outlet No. 2 oil cooler hose and transmission oil cooler.

(d) Slide the 4 clips and remove the inlet No. 1 oil cooler hose, inlet No. 2 oil cooler hose, outlet No. 1 oil cooler hose and outlet No. 2 oil cooler hose from the No. 1 oil cooler tube sub-assembly without hose.

*1	No. 1 Oil Cooler Tube Sub-assembly without Hose
*2	Inlet No. 1 Oil Cooler Hose
*3	Inlet No. 2 Oil Cooler Hose
*4	Outlet No. 1 Oil Cooler Hose
*5	Outlet No. 2 Oil Cooler Hose

15. DISCONNECT NO. 1 WATER BY-PASS HOSE

(a) Disengage the 3 clamps to remove the transmission breather clamp.

(b) Slide the clip and disconnect the No. 1 water by-pass hose from the transmission oil cooler.

HINT:

Use a container to catch any coolant which flows out of the No. 1 water by-pass hose and transmission oil cooler.

16. DISCONNECT WATER BY-PASS HOSE ASSEMBLY

(a) Slide the clip and disconnect the water by-pass hose assembly from the transmission oil cooler.

HINT:

Use a container to catch any coolant which flows out of the water by-pass hose assembly and transmission oil cooler.

17. REMOVE TRANSMISSION OIL COOLER

(a) Remove the 3 bolts.

(b) Disengage the hook to remove the transmission oil cooler from the automatic transaxle case sub-assembly.

HINT:

Use a container to catch any coolant and automatic transaxle fluid which flow out of the transmission oil cooler.

Differential Oil Seal

Oil Pump

See More:

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Ua80e Automatic Transmission / Transaxle: Transmission Control Cable
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