Land Rover 4 0 4 6 V8 Engine Overhaul 3rd Edition Rover Manual

ENGINE
14
OVERHAUL TIMING CHAIN AND GEARS
Sump - remove
1.Remove dipstick.
2.Remove 14 bolts and 3 nuts securing sump to
cylinder block and timing cover.
3.Taking care not to damage sealing faces,
carefully release sump from timing cover and
cylinder block.
4.Remove sump.Timing cover - remove
NOTE: Timing cover, oil pump and oil
pressure relief valve are only supplied as
an assembly.
1.Using assistance, restrain flywheel/drive plate
and remove crankshaft pulley bolt; collect
spacer washer - if fitted....

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OVERHAUL15
7.Remove bolt securing camshaft sensor to
timing cover, withdraw sensor; remove and
discard O ring.
8.Release harness connector from mounting
bracket.
NOTE: New Range Rover timing cover
illustrated.
9.Noting their fitted position, remove 9 bolts
securing timing cover to cylinder block; remove
cover; collect camshaft sensor harness
mounting bracket.
NOTE: Timing cover is dowel located.
CAUTION: Do not attempt to remove oil
pump drive gear at this stage.
10.Remove and discard gasket....

ENGINE
16
OVERHAUL Timing chain and gears - inspection
1.Thoroughly clean all components.
2.Inspect timing chain links and pins for wear.
3.Inspect timing chain gears for wear. Replace
components as necessary.Timing gears - refit
1.Clean gear locations on camshaft and
crankshaft, fit Woodruff key to crankshaft.
2.Temporarily fit crankshaft gear and if
necessary, turn crankshaft to bring timing mark
on gear to the twelve oclock position, remove
gear.
3.Temporarily fit camshaft gear.
4.Turn camshaft until...

ENGINE
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5.Position timing gears on work surface with
timing marks aligned.
6.Fit timing chain around gears, keeping timing
marks aligned.
7.Fit gear and chain assembly.
NOTE: Timing marks must be facing
forwards.
8.Fit camshaft gear bolt, restrain camshaft gear
and tighten bolt to 50 Nm (37 lbf.ft).Timing cover - refit
NOTE: Timing cover, oil pump and oil
pressure relief valve are only supplied as
an assembly.
1.Clean sealant from threads of timing cover
bolts.
2.Clean all traces of gasket...

ENGINE
18
OVERHAUL
NOTE: New Range Rover timing cover
illustrated.
9.Position camshaft sensor harness mounting
bracket to timing cover ensuring that bracket is
positioned parallel to crankshaft centre line. Fit
bolts and tighten in sequence shown to 22 Nm
(16 lbf.ft).
CAUTION: Do not fit coolant pump bolts at
this stage.
10.Remove toolLRT-12-090.
A- Early type seal
B- Later type seal - use as replacement on all
engines
11.Lubricate new timing cover oil seal with Shell
Retinax LX grease ensuring that...

ENGINE
OVERHAUL19
12.Fit timing cover oil seal using toolLRT-12-089.
13.Smear a new O ring with engine oil and fit to
oil pick-up pipe.
14.Position oil pick-up pipe spacer on number 4
main bearing cap stud.
15.Fit oil pick-up pipe ensuring that end of pipe is
correctly inserted in oil pump body.
16.Fit oil pick-up pipe to oil pump body bolts and
tighten to 8 Nm (6 lbf.ft).
17.Fit washers and nut securing oil pick-up pipe to
stud, tighten nut to 24 Nm (18 lbf.ft).
18.Smear a new O ring with engine oil and...

ENGINE
20
OVERHAUL
4.Fit sump bolts and nuts and working in
sequence shown, tighten to 23 Nm (17 lbf.ft).
5.Fit sump drain plug and tighten to 45 Nm (33
lbf.ft).
6.Fit dipstick.OIL PUMP AND OIL PRESSURE RELIEF VALVE
NOTE: 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 and oil pump
assembly must be fitted.
Oil pump - remove
1.Remove timing cover.
CAUTION: Do not...

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3.Make suitable alignment marks on inner and
outer rotors, remove rotors and oil pump drive
gear as an assembly.Oil pressure relief valve - remove
1.Remove circlip.
2.Remove relief valve plug, remove and discard
O ring.
3.Remove relief valve spring and piston. 

ENGINE
22
OVERHAUL 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.
4.Using feeler gauges, check clearance between
teeth of inner and outer rotors:
Maximum clearance =...

ENGINE
OVERHAUL23
Oil pressure relief valve - inspection
1.Clean relief valve components and piston bore
in timing cover.
2.Check piston and bore for scoring and that
piston slides freely in bore with no perceptible
side movement.
3.Check relief valve spring for damage and
distortion; check spring free length:
Spring free length = 60.0 mm (2.4 in).Oil pump - refit
1.Lubricate rotors, oil pump drive gear, cover
plate and housing with engine oil.
2.Assemble rotors and drive gear in housing
ensuring that...