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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission System (UA80F) - Service Information (1 Of 2) >> Oil Cooler >> Installation [09/2020 - 10/2022] >> Procedure

Installation [09/2020 - 10/2022]: Procedure

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

    HINT: 

    Perform this procedure only when replacement of the No. 1 oil cooler tube sub-assembly without hose is necessary.

    1. Install the inlet No. 1 oil cooler hose, inlet No. 2 oil cooler hose and outlet No. 3 oil cooler hose to the No. 1 oil cooler tube sub-assembly without hose and slide the 3 clips to secure them.
      GTY889664Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Inlet No. 1 Oil Cooler Hose *2 Inlet No. 2 Oil Cooler Hose
      *3 Outlet No. 3 Oil Cooler Hose *4 No. 1 Oil Cooler Tube Sub-assembly without Hose
      *a 2 to 7 mm (0.0787 to 0.276 in.) *b 0 to 3 mm (0 to 0.118 in.)
      *c 45° (Claw of Clip Location) - -
      NOTE:
      • Make sure to slide the inlet No. 1 oil cooler hose, inlet No. 2 oil cooler hose and outlet No. 3 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.
    2. Temporarily install the No. 1 oil cooler tube sub-assembly without hose to the automatic transaxle case sub-assembly with the 2 bolts.
      GTY884376Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Torque Wrench Fulcrum Length
      *b Union Nut Wrench
    3. Using a 12 mm union nut wrench, fully tighten the bolt (A).

      Specified Tightening Torque 

      Torque: 13.5 N.m (138 kgf/cm, 10 ft.lbf) 

      HINT: 

      • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

        Refer to PRECAUTION [12/2019 - 11/2023]

      • When using a 12 mm union nut wrench (fulcrum length of 20 mm (0.787 in.)) + torque wrench (fulcrum length of 162 mm (6.38 in.)):

        12 N.m (122 kgf/cm, 9 ft.lbf)

    4. Using a 14 mm union nut wrench, fully tighten the bolt (B).

      Specified Tightening Torque 

      Torque: 28 N.m (286 kgf/cm, 21 ft.lbf) 

      HINT: 

      • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

        Refer to PRECAUTION [12/2019 - 11/2023]

      • When using a 14 mm union nut wrench (fulcrum length of 25 mm (0.984 in.)) + torque wrench (fulcrum length of 180 mm (7.09 in.)):

        24.6 N.m (251 kgf/cm, 18 ft.lbf)

    5. Connect the inlet No. 1 oil cooler hose to the oil cooler outlet union or elbow and slide the clip to secure it.
      GTY882028Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 0 to 3 mm (0 to 0.118 in.)
      *b 2 to 7 mm (0.0787 to 0.276 in.)
      *c End of Paint Mark Visible
      *d Paint Mark
      NOTE:
      • Make sure to slide the inlet No. 1 oil cooler hose until it contacts the hose stopper of the oil cooler outlet union or elbow.
      • Make sure that the paint mark of the inlet No. 1 oil cooler hose and clip are within the location shown in the illustration.
  2. CONNECT NO. 3 TRANSMISSION OIL COOLER HOSE 

    HINT: 

    Perform this procedure only when replacement of the No. 1 oil cooler tube sub-assembly without hose is necessary.

    1. Connect the No. 3 transmission oil cooler hose to the No. 1 oil cooler tube sub-assembly without hose and slide the clip to secure it.
      NOTE:
      • Make sure to slide the No. 3 transmission oil cooler hose until it contacts the hose stopper of the No. 1 oil cooler tube sub-assembly without hose.
      • Make sure that the paint mark of the No. 3 transmission oil cooler hose is within the location shown in the illustration.
      • Make sure that the clip is within the location shown in the illustration.
      GTY939932Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *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 30° (Paint Mark Location)
  3. INSTALL TRANSMISSION OIL COOLER 
    1. Install the transmission oil cooler to the automatic transaxle case sub-assembly with the 3 bolts.
      GTY867325Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 13.5 N.m (138 kgf/cm, 10 ft.lbf) 

      HINT: 

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

    2. Engage the wire harness clamp.
  4. CONNECT OUTLET NO. 3 OIL COOLER HOSE 
    1. Connect the outlet No. 3 oil cooler hose to the transmission oil cooler and slide the clip to secure it.
      GTY894594Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *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 30° (Paint Mark Location)
      *e 45° (Claw of Clip Location)
      NOTE:
      • Make sure to slide the outlet No. 3 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. 3 oil cooler hose with paint mark of the transmission oil cooler.
      • Make sure that the paint mark of the outlet No. 3 oil cooler hose and claws of the clip are within the location shown in the illustration.
  5. CONNECT INLET NO. 2 OIL COOLER HOSE 
    1. Connect the inlet No. 2 oil cooler hose to the transmission oil cooler and slide the clip to secure it.
      NOTE:
      • 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.
      GTY916845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *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)
  6. CONNECT WATER BY-PASS HOSE ASSEMBLY 
    1. Connect the water by-pass hose assembly to the transmission oil cooler and slide the 2 clips to secure it.
      GTY927590Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a 2 to 7 mm (0.0787 to 0.276 in.) *b Paint Mark
      *c 45° (Claw of Clip Location) - -
      NOTE:
      • 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.
  7. INSTALL TRANSMISSION BREATHER CLAMP 
    1. Engage the 3 clamps to install the transmission breather clamp.
  8. INSTALL BATTERY CLAMP SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 45

  9. INSTALL BATTERY 

    Refer to INSTALLATION [12/2019 - 10/2022]

  10. INSTALL AIR CLEANER ASSEMBLY WITH AIR CLEANER HOSE 

    Refer to PROCEDURE - Step 50

  11. INSTALL INLET AIR CLEANER ASSEMBLY 

    Refer to PROCEDURE - Step 51

  12. INSTALL COOL AIR INTAKE DUCT SEAL (for Sport Package) 

    Refer to PROCEDURE - Step 4

  13. INSTALL COOL AIR INTAKE DUCT SEAL (except Sport Package) 

    Refer to PROCEDURE - Step 4

  14. ADD ENGINE COOLANT 

    Refer to PROCEDURE - Step 2

  15. ADJUST AUTOMATIC TRANSAXLE FLUID 

    Refer to ADJUSTMENT [12/2019 - 10/2022] 

  16. INSPECT FOR COOLANT LEAK 

    Refer to PROCEDURE - Step 1

  17. INSPECT FOR AUTOMATIC TRANSAXLE FLUID LEAK 
  18. INSTALL FRONT FENDER APRON SEAL LH 

    Refer to PROCEDURE - Step 74

  19. INSTALL REAR ENGINE UNDER COVER LH 

    Refer to PROCEDURE - Step 79

  20. INSTALL NO. 1 ENGINE UNDER COVER 

    Refer to PROCEDURE - Step 80

  21. INSTALL FRONT WHEEL OPENING EXTENSION PAD LH 

    Refer to PROCEDURE - Step 81

  22. INSTALL FRONT WHEEL OPENING EXTENSION PAD RH 

    Refer to PROCEDURE - Step 82

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