Oil Pump: Inspection

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT STATOR SHAFT ASSEMBLY
1. Using a dial indicator, measure the inside diameter of the stator shaft bushings.
  Standard inside diameter:
  
  21.500 to 21.526 mm (0.84646 to 0.84748 in.)
  
  Maximum inside diameter:
  
  21.526 mm (0.84748 in.)
  
  If the inside diameter is greater than the maximum, replace the stator shaft.
  
  Fig 1: Identifying Inside Diameter Of Stator Shaft Bushings
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Install the input shaft assembly onto the stator shaft assembly and check that the input shaft assembly turns smoothly.
  NOTE: Replace the stator assembly with a new one if it moves roughly or makes unusual noise. Inspect the input shaft's contact surface with the bearing when replacing, and replace the input shaft with a new one if any damage or discoloration is found.
  
  Fig 2: Identifying Input Shaft Assembly Turns Smoothly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT OIL PUMP GEAR CLEARANCE

Measure the clearance between the tips of the driven gear teeth and the drive gear teeth.
Standard tip clearance:

0.07 to 0.15 mm (0.0028 to 0.0059 in.)

Maximum tip clearance:

0.15 mm (0.0059 in.)

If the tip clearance is greater than the maximum, replace the oil pump body sub-assembly.

Fig 3: Identifying Clearance Between Tips Of Driven Gear Teeth And Drive Gear Teeth
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Push the driven gear to one side of the body. Using a feeler gauge, measure the clearance.
Standard body clearance:

0.10 to 0.15 mm (0.0039 to 0.0059 in.)

Maximum body clearance:

0.15 mm (0.0059 in.)

If the body clearance is greater than the maximum, replace the oil pump body sub-assembly.

Fig 4: Identifying Clearance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using a steel straight edge and feeler gauge, measure the side clearance of both gears.

Standard side clearance:

0.02 to 0.05 mm (0.0008 to 0.0020 in.)

Maximum side clearance:

0.05 mm (0.0020 in.)

If the side clearance is greater than the maximum, replace the drive gear, driven gear or pump body.

Fig 5: Identifying Side Clearance Of Both Gears

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Drive gear thickness

DRIVE GEAR THICKNESS SPECIFICATION

No.	Thickness mm (in.)
1	9.44 to 9.45 (0.3709 to 0.3713)
2	9.45 to 9.46 (0.3713 to 0.3717)
3	9.46 to 9.47 (0.3717 to 0.3721)
4	9.47 to 9.48 (0.3721 to 0.3725)
5	9.48 to 9.49 (0.3725 to 0.3729)

Driven gear thickness

DRIVEN GEAR THICKNESS SPECIFICATION

No.	Thickness mm (in.)
1	9.44 to 9.45 (0.3709 to 0.3713)
2	9.45 to 9.46 (0.3713 to 0.3717)
3	9.46 to 9.47 (0.3717 to 0.3721)
4	9.47 to 9.48 (0.3721 to 0.3725)
5	9.48 to 9.49 (0.3725 to 0.3729)

INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY
1. Using a dial indicator, measure the inside diameter of the oil pump body bushing.
  Standard inside diameter:
  
  38.113 to 38.138 mm (1.50050 to 1.50149 in.)
  
  Maximum inside diameter:
  
  38.138 mm (1.50149 in.)
  
  If the inside diameter is greater than the maximum, replace the oil pump body sub-assembly.
  
  Fig 6: Identifying Inside Diameter Of Oil Pump Body Bushing
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002