Land Rover 3 5 3 9 4 2 V8 Engine Overhaul 1997 Rover Manual

ENGINE
24
OVERHAUL OIL PUMP - ENGINE NUMBERS WITHOUT
SUFFIX B
Oil pump - remove
1.Remove sump.
2.Remove distributor.
3.Remove timing cover.
4.Remove oil cooler adapter - if fitted.
5.Remove oil pressure relief valve plug, discard
sealing washer.
6.Withdraw pressure relief valve spring and
valve.
7.Remove oil pressure switch, discard sealing
washer.
8.Remove bolts securing oil pump cover.
9.Remove cover, remove and discard gasket.
10.Withdraw oil pump gears.Oil pump - inspection
1.Throughly clean oil pump...

ENGINE
OVERHAUL25
Oil pump - refit
1.Lubricate relief valve, spring, and bore in
housing with clean engine oil.
2.Fit relief valve and valve spring.
3.Fit new sealing washer to plug, fit plug and
tighten to 45 Nm (33 lbf.ft).
4.Pack oil pump housing with Petroleum Jelly.
CAUTION: Use only Petroleum Jelly, no
other grease is suitable.
5.Fit oil pump gears ensuring that Petroleum
Jelly is forced into every cavity between teeth
of gears.
CAUTION: Unless pump is fully packed
with Petroleum Jelly it may not...

ENGINE
26
OVERHAUL 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.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...

ENGINE
OVERHAUL27
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 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) 

ENGINE
28
OVERHAUL Oil pump - refit
1.Lubricate rotors, oil pump drive gear, cover
plate and housing with engine oil.
2.Assemble rotors in housing ensuring that
reference marks are aligned.
3.Position cover plate to housing.
4.Apply Loctite 222 to threads of cover plate
screws and bolt - if fitted, fit but do not fully
tighten screws and bolt.
5.Position drive gear in oil pump, tighten cover
plate screws and bolt - if fitted to:
Screws - 4 Nm (3 lbf.ft).
Bolt - 8 Nm (6 lbf.ft)
6.Fit timing cover.Oil...

ENGINE
OVERHAUL29
CAMSHAFT AND TAPPETS
Camshaft end-float - check
NOTE: this check is only applicable to
camshafts fitted with thrust plate.
1.Remove rocker shaft assemblies.
2.Remove push rods and store in fitted order.
3.Remove timing chain and gears.
4.Temporarily fit camshaft gear bolt.
5.Attach a suitable DTI to front of cylinder block
with stylus of gauge contacting end of
camshaft.
6.Push camshaft rearwards and zero gauge.
7.Using camshaft gear bolt, pull camshaft
forwards and note end-float...

ENGINE
30
OVERHAUL
3.Remove 2 bolts securing camshaft thrust plate
- if fitted to cylinder block, remove plate.
4.Withdraw camshaft, taking care not to damage
bearings in cylinder block.Camshaft and tappets - inspection
1.Throughly clean all components.
2.Inspect camshaft bearing journals and lobes
for signs of wear, pitting, scoring and
overheating.
3.Support camshaft front and rear bearings on
vee blocks, and using a DTI, measure
camshaft run-out on centre bearing.
Maximum permitted run-out = 0.05 mm...

ENGINE
OVERHAUL31
Camshaft and tappets - refit
1.Lubricate camshaft journals with clean engine
oil and carefully insert camshaft into cylinder
block.
2.Fit camshaft thrust plate - if fitted, ensuring that
it is correctly located in camshaft groove. Fit
bolts and tighten to 25 Nm (18 lbf.ft)
NOTE: If camshaft or thrust plate has been
replaced, it will be necessary to re-check
camshaft end-float.
3.Immerse tappets in clean engine oil. Before
fitting, pump the inner sleeve of tappet several
times using a...

ENGINE
32
OVERHAUL Piston rings - remove
1.Using a suitable piston ring expander, remove
and discard piston rings.
2.Remove carbon from piston ring grooves.
NOTE: Use an old broken piston ring with
a squared off end.
CAUTION: Do not use a wire brush.Piston rings - inspection
1.Temporarily fit new compression rings to
piston.
NOTE: The ring marked TOP must be
fitted, with marking uppermost, into
second groove. The chrome ring fits into
top groove and can be fitted either way round.
2.Check compression...

ENGINE
OVERHAUL33
Pistons - remove
1.Clamp hexagon body ofLRT-12-013in vice.
2.Screw large nut back until flush with end of
centre screw.
3.Push centre screw forward until nut contacts
thrust race.
4.Locate piston adapterLRT-12-014with its long
spigot inside bore of hexagon body.
5.Locate piston and connecting rod assembly on
centre screw and up to adapterLRT-12-014.
6.Fit remover/replacer bush ofLRT-12-014on
centre screw with flanged end away from
gudgeon pin.
7.Screw stop nut on to centre screw.
8.Lock...