Oil Pump: Service and Repair
OIL PUMPRemoval and Installation
^ When installing the oil pump, apply clean engine oil to the rotor.
^ Make sure that O-ring seal is fitted properly.
^ Use a scraper to remove the old sealant from the mating surface of the front cover.
^ Also remove all traces of the old sealant from the mating surface of the engine block.
1. Remove the drive belts.
2. Remove the oil pan. Refer to Removal.
3. Remove the oil strainer.
4. Remove the front cover. Refer to Removal.
5. Install the front cover, applying a continuous bead of Genuine RTV Silicone Sealant or equivalent to mating surface of front cover assembly. Refer to LIQUID GASKET APPLICATION PROCEDURE.
6. Installation is in the reverse order of removal.
Disassembly and Assembly
Inspection
^ Install the oil pump rotors with the punch marks on the oil pump cover side, as shown.
^ Using a feeler gauge, check the following clearances.
Standard clearance
^ If the tip clearance (2) exceeds the limit, replace the rotor set.
^ If the body to rotor clearances (1, 3, 4, 5) exceed the limit, replace the front cover assembly.
Regulator Valve Inspection
1. Visually inspect components for wear and damage.
2. Check oil pressure regulator valve sliding surface and valve spring.
3. Coat regulator valve with engine oil.
^ Check that the regulator valve falls smoothly into the valve hole by its own weight and gravity.
^ If damaged, replace the regulator valve set or front cover assembly.
4. Check regulator valve to front cover clearance.
Clearance: 0.040 - 0.097 mm (0.0016 - 0.0038 inch)
^ If the valve exceeds the specification, replace the front cover assembly.