Range Rover County LWB (LH) V8-4.2L (1993)
Oil Pump: Service and Repair
Oil Pump - Engine Numbers With Suffix B
Oil Pump - Engine Numbers With Suffix B
CAUTION: Overhaul procedures for the oil & pump and oil pressure relief valve are limited to carrying out dimensional checks. In the event
of wear or damage being found, a replacement timing cover assembly must be fitted.
Oil pump - remove
1. Remove timing cover.
2. Remove oil pump drive gear.
3. Remove screws and bolt - if fitted securing cover plate, remove plate.
4. Make suitable alignment marks on inner and outer rotors, remove rotors.
Oil pressure relief valve - remove
1. Remove circlip.
2. Remove relief valve plug, remove and discard '0' ring.
3. Remove relief valve spring and piston.
Oil pump - inspection
1. Thoroughly clean oil pump drive gear, cover plate, rotors and housing. Remove all traces of Loctite from cover plate securing screws; ensure
tapped holes in timing cover are clean and free from oil.
2. Check mating surfaces of cover plate, rotors and housing for scoring.
3. Assemble rotors and oil pump drive gear in housing ensuring that reference marks are aligned.