landrover Workshop Repair Guides

Land Rover Workshop Service and Repair Manuals

Oil pressure by-pass valve - inspection > < Oil pressure relief valve - remove
Page 55
background image

ENGINE

26

OVERHAUL

Oil pump - inspection

1. Thoroughly clean oil pump drive gear, cover

plate, rotors and housing. Remove all traces of
sealant from threads of cover plate securing
screws and bolt; 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.

4. Using feeler gauges, check clearance between

teeth of inner and outer rotors:
Maximum clearance = 0.25 mm (0.01 in)

5. Remove oil pump drive gear, check depth of

any wear steps on gear teeth:
Wear step maximum depth = 0.15 mm (0.006
in)

6. Place a straight edge across housing.
7. Using feeler gauges, check clearance between

straight edge and rotors:
Maximum clearance = 0.1 mm (0.004 in).

Oil pressure by-pass valve - inspection > < Oil pressure relief valve - remove