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Oil Pump: Inspection: Inspection

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  1. INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY 
    1. Using a dial indicator, measure the inside diameter of the oil pump body bushing.
      Fig 1: Measuring Inside Diameter Of Oil Pump Body Bushing
      GTY121994Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard inside diameter

      38.138 mm (1.5015 in.)

      If the inside diameter is greater than the standard inside diameter, replace the oil pump body.

  2. INSPECT STATOR SHAFT ASSEMBLY 
    1. Using a dial indicator, measure the inside diameter of the stator shaft bushing.
      Fig 2: Checking Inside Diameter Of Stator Shaft Bushing
      GTY113862Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard inside diameter

      21.527 mm (0.8475 in.)

      If the inside diameter is greater than the standard inside diameter, replace the stator shaft.

  3. INSPECT CLEARANCE OF OIL PUMP ASSEMBLY 
    1. Push the driven gear to one side of the body.
      Fig 3: Checking Clearance Of Oil Pump Assembly
      GTY149527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using a feeler gauge, measure the clearance.

      Standard body clearance

      0.10 to 0.17 mm (0.0039 to 0.0067 in.)

      If the body clearance is greater than the standard clearance, check the drive gear, the driven gear and the pump body.

    3. Using a feeler gauge, measure the clearance between the driven gear teeth and the drive gear teeth.
      Fig 4: Measuring Clearance Between Driven Gear Teeth And Drive Gear Teeth
      GTY149528Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard tip clearance

      0.070 to 0.150 mm (0.0028 to 0.0059 in.)

      If the tip clearance is greater than the standard clearance, check the drive gear, the driven gear and the pump body.

    4. Using a steel straight edge and a feeler gauge, measure the side clearance of both gears.
      Fig 5: Measuring Side Clearance Of Both Gears
      GTY149321Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard side clearance

      0.02 to 0.04 mm (0.00079 to 0.00157 in.)

      If the side clearance is greater than the standard thickness, check the drive gear, the driven gear and the pump body.

    5. There are 7 different thicknesses for the drive and driven gears.

      Drive and driven gears thickness

      Mark Thickness
      0 9.946 to 9.952 mm (0.39157 to 0.39181 in.)
      1 9.953 to 9.959 mm (0.39185 to 0.39209 in.)
      2 9.960 to 9.966 mm (0.39213 to 0.39236 in.)
      3 9.967 to 9.973 mm (0.39240 to 0.39264 in.)
      4 9.974 to 9.980 mm (0.39268 to 0.39291 in.)
      5 9.981 to 9.987 mm (0.39295 to 0.39319 in.)
      6 9.988 to 9.994 mm (0.39323 to 0.39346 in.)
  4. INSPECT OIL PUMP DRIVE GEAR ROTATION 
    1. Make sure that the drive gear rotates smoothly.
      Fig 6: Checking Oil Pump Drive Gear Rotation
      GTY143666Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the oil pump assembly from the torque converter.
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