Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2007 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Oil Pump: Inspection

INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY
1. Using a caliper gauge, measure the inside diameter of the oil pump body bush.
  Maximum inside diameter: 38.138 mm (1.5015 in.)
  
  If the inside diameter is greater than the maximum, replace the oil pump body sub-assembly.
  
  Fig 1: Measuring Inside Diameter Of Oil Pump Body Bushing
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT STATOR SHAFT ASSEMBLY
1. Using a caliper gauge, measure the inside diameter of the stator shaft bush.
  Maximum inside diameter:
  
  Front side: 21.527 mm (0.8475 in.)
  
  Rear side: 32.03 mm (1.261 in.)
  
  If the inside diameter is greater than the maximum, replace the stator shaft assembly.
  
  Fig 2: Measuring Inside Diameter Of Stator Shaft Bushing
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT CLEARANCE OF OIL PUMP ASSEMBLY

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

If the body clearance is not as specified, replace the drive gear, driven gear and pump body.

Fig 3: Measuring Clearance Between Driven Gear And Pump Body
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Using a feeler gauge, measure the clearance between the driven gear teeth and drive gear teeth.
Standard tip clearance: 0.070 to 0.150 mm (0.0028 to 0.0059 in.)

If the tip clearance is not as specified, replace the drive gear, driven gear and pump body.

Fig 4: Measuring Clearance Between Driven Gear Teeth And Drive Gear Teeth
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using a steel straightedge and feeler gauge, measure the clearance between both gears and straightedge.

Standard side clearance: 0.03 to 0.05 mm (0.0012 to 0.002 in.)

If the side clearance is not as specified, replace the drive gear, driven gear and pump body.

HINT:

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

Fig 5: Measuring Side Clearance Of Both Gears

G05290048

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard drive and driven gears thickness

THICKNESS REFERENCE CHART

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. Place the oil pump assembly on the torque converter clutch.
2. Make sure that the drive gear rotates smoothly.
  
  Fig 6: Inspecting Front Oil Pump Drive Gear Rotation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.