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.
Exploded View: Inspection
- 2. Remove the pump cover.
- 3. Check the inner-to-outer rotor radial clearance between the inner rotor (A) and outer rotor (B). If the inner-to-outer rotor radial clearance exceeds the service limit, replace the oil pump.
Inner Rotor-to-Outer Rotor Radial Clearance
Standard (New): 0.02-0.14 mm (0.001-0.006 in.)
Service Limit: 0.18 mm (0.007 in.)
- 4. Check the housing-to-rotor axial clearance between the rotor (A) and pump housing (B). If the housing-to-rotor axial clearance exceeds the service limit, replace the oil pump.
Housing-to-Rotor Axial Clearance
Standard (New): 0.02-0.07 mm (0.001-0.003 in.)
Service Limit: 0.12 mm (0.005 in.)
- 5. Check the housing-to-outer rotor radial clearance between the outer rotor (A) and pump housing (B).
If the housing-to-outer rotor radial clearance exceeds the service limit, replace the oil pump.
Housing-to-Outer Rotor Radial Clearance
Standard (New): 0.100-0.175 mm (0.0039-0.0069 in.)
Service Limit: 0.20 mm (0.008 in.)
- 6. Inspect both rotors and the pump housing for scoring or other damage. Replace the damaged parts if necessary.
- 7. Remove the old oil seal from the oil pump.
- 8. Use the special tools to install a new oil seal. Drive the seal until the special tool bottoms on the oil pump.
- 9. Install the oil pump cover.
Installation
- 10. Install the cam chain (see CAM CHAIN INSTALLATION ).
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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