Oil Pump: Inspection

WARNING: This page is about a different variant/trim than selected.

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: 38.138 mm (1.5015 in.)

Fig 1: Measuring Inside Diameter Of Oil Pump Body Bushing Using Dial Indicator
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

If the inside diameter is greater than the standard inside diameter, replace the oil pump body.
INSPECT STATOR SHAFT ASSEMBLY
1. Using a dial indicator, measure the inside diameter of the stator shaft bushing.
Standard inside diameter:

Front side: 21.527 mm (0.8475 in.)

Rear side: 32.03 mm (1.261 in.)

Fig 2: Measuring Inside Diameter Of Stator Shaft Bushing Using Dial Indicator
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

INSPECT CLEARANCE OF OIL PUMP ASSEMBLY

Push the driven gear to one side of the body.
Using a feeler gauge, measure the clearance.
Standard body clearance: 0.10 to 0.17 mm (0.0039 to 0.0067 in.)

Fig 3: Measuring Clearance Of Oil Pump Assembly
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

If the body clearance is greater than the standard clearance, check the drive gear, the driven gear and the pump body.
Using a feeler gauge, measure the clearance between the driven gear teeth and the drive gear teeth.
Standard tip clearance: 0.070 to 0.150 mm (0.0028 to 0.0059 in.)

Fig 4: Measuring Clearance Between Driven Gear Teeth & Drive Gear Teeth
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

If the tip clearance is greater than the standard clearance, check the drive gear, the driven gear and the pump body.
Using a steel straight edge and feeler gauge, measure the side clearance of both gears.
Standard side clearance: 0.03 to 0.05 mm (0.0012 to 0.002 in.)

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

Fig 5: Measuring Side Clearance Of Both Gears Using Straight Edge & Feeler Gauge
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
There are 7 different thicknesses for the drive and driven gears.

Drive and driven gears thickness

DRIVE AND DRIVEN GEARS THICKNESS SPECIFICATIONS

Mark	Thickness
0	10.736 to 10.742 mm (0.42268 to 0.42291 in.)
1	10.743 to 10.749 mm (0.42296 to 0.42319 in.)
2	10.750 to 10.756 mm (0.42323 to 0.42346 in.)
3	10.757 to 10.763 mm (0.42350 to 0.42374 in.)
4	10.764 to 10.770 mm (0.42378 to 0.42401 in.)
5	10.771 to 10.777 mm (0.42405 to 0.42429 in.)
6	10.778 to 10.784 mm (0.42433 to 0.42457 in.)

INSPECT OIL PUMP DRIVE GEAR ROTATION
1. Make sure that the drive gear rotates smoothly.
2. Remove the oil pump assembly from the torque converter.
Fig 6: Inspecting Oil Pump Drive Gear Rotation
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.