1. Remove the timing chain.
2. Remove oil filter A, then oil pump B.
Checking the oil pump
1. Remove the pump cover.
2. Check the radial clearance between the inner and outer rotors (between the inner rotor A and the outer rotor B). If the axial clearance between the inner and outer rotors exceeds the limit, replace the oil pump assembly.
Radial clearance between inner and outer rotors:
- Standard (new): 0.02-0.14 mm.
- Working range: 0.20 mm.
Clearance between rotor and housing:
- Standard (new): 0.02-0.07 mm.
- Working limit: 0.15 mm.
Clearance between outer rotor and housing:
- Standard (new): 0.10-0.18 mm.
- Working limit: 0.20 mm.
5. Check both rotors and the pump body for scratches or other damage. Replace damaged parts if necessary.
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6. Install the oil pump cover.
Installing an oil pump
1. Install the guide pins A and new seal ring B onto the oil pump C, then align the inner rotor with the crankshaft and install the oil pump.
2. Install the oil deflector plate D with a new gasket E.
3. Install the timing chain.