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Repair [08/2015 - 08/2018]: Procedure

WARNING: This page is about a different car, the 2018 Toyota Sequoia, 2017 Toyota Sequoia, and 2016 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
  1. REPAIR INTAKE VALVE SEAT 
    NOTE:
    • Repair the seat while checking the seating position.
    • Keep the lip free of foreign matter.
    • Take off a cutter gradually to make the intake valve seat smooth.
    1. Using a 45° cutter, resurface the valve seat so that the valve seat width is more than the specification.
      GTY105118Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using 30° and 60° cutters, correct the valve seat so that the valve contacts the entire circumference of the seat. The contact should be in the center of the valve seat, and the valve seat width should be maintained within the specified range around the entire circumference of the seat.
      GTY545594Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard width

      1.1 to 1.5 mm (0.0433 to 0.0591 in.)

    3. Hand-lap the valve and valve seat with an abrasive compound.
    4. Check the valve seating position.
  2. REPAIR EXHAUST VALVE SEAT 
    NOTE:
    • Repair the seat while checking the seating position.
    • Keep the lip free of foreign matter.
    • Take off a cutter gradually to make the exhaust valve seat smooth.
    1. Using a 45° cutter, resurface the valve seat so that the valve seat width is more than the specification.
      GTY103635Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using 30° and 60° cutters, correct the valve seat so that the valve contacts the entire circumference of the seat. The contact should be in the center of the valve seat, and the valve seat width should be maintained within the specified range around the entire circumference of the seat.
      GTY102588Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard width

      1.1 to 1.5 mm (0.0433 to 0.0591 in.)

    3. Hand-lap the valve and valve seat with an abrasive compound.
    4. Check the valve seating position.
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