Grand Cherokee 2WD V8-4.7L Flex Fuel (2008)
Oil Pump: Procedures
Engine Oil Pump - Cleaning
CLEANING
1. Wash all parts in a suitable solvent.
Engine Oil Pump - Inspection
INSPECTION
CAUTION: Oil pump pressure relief valve and spring should not be removed from the oil pump. If these components are disassembled and or
removed from the pump the entire oil pump assembly must be replaced.
1. Clean all parts thoroughly. Mating surface of the oil pump housing should be smooth. If the pump cover is scratched or grooved the oil pump
assembly should be replaced.
2. Lay a straight edge across the pump cover surface (3). If a 0.025 mm (0.001 in.) feeler gauge (2) can be inserted between the cover and the straight
edge the oil pump assembly should be replaced.
3. Measure the thickness of the outer rotor. If the outer rotor thickness measures at 12.005 mm (0.472 in.) or less the oil pump assembly must be
replaced.
4. Measure the diameter of the outer rotor. If the outer rotor diameter measures at 85.925 mm (3.382 in.) or less the oil pump assembly must be
replaced.
