2002 LAND ROVER DISCOVERY oil pressure

ENGINE - TD5
ADJUSTMENTS 12-1-35
ADJUST ME NTS
Engine oil pressure check
$% 12.90.09.01
Check
1.Remove oil pressure switch.

+ ENGINE - Td5, REPAIRS, Switch -
oil pressure.
2.Connect pressure check kit LRT-12-052C
adaptor and gauge to oil pressure switch
position on oil cooler.
3.Check and if necessary top up engine oil.
4.Run engine at idle speed and check that oil
pressure is within limits given.

+ GENERAL DATA, Engine - Td5.
5.Switch off ignition.
6.Remove pressure check kit LRT-12-052C.
7.Clean oil spillage.
8.Fit oil pressure switch.

+ ENGINE - Td5, REPAIRS, Switch -
oil pressure.
Adjust
1.If engine oil pressure is outside of specified
limits, check condition of oil pump and/or main
and connecting rod bearings.

ENGINE - TD5
12-1-62 REPAIRS
Valve - relief - oil pressure
$% 12.60.56
Remove
1.Remove sump gasket.

+ ENGINE - Td5, REPAIRS, Gasket -
sump.
2.Remove and discard plug from oil pump
housing.
3.Remove spring and valve.
Refit
1.Clean valve, spring and plug.
2.Clean valve seating inside oil pump housing.
3.Check valve and bore for scoring and
corrosion. Light scoring may be removed using
grade 600 emery cloth soaked in oil.
4.Check spring for distortion, check free length of
spring: Spring free length = 42.00 mm (1.65 in).
CAUTION: Renew relief valve as an
assembly.
5.Lubricate valve and seating.
6.Fit valve and spring to pump.
7.Apply Loctite 243 sealant to threads of new
plug.
CAUTION: Do not attempt to fit original
plug.
8.Fit oil pump pressure relief valve plug and
tighten to 23 Nm (17 lbf.ft).
9.Fit sump gasket.

+ ENGINE - Td5, REPAIRS, Gasket -
sump.
10.Check engine oil level, top-up if necessary.
Switch - oil pressure
$% 12.60.50
Remove
1.Remove fixings and remove engine acoustic
cover.
2.Remove 3 bolts and remove exhaust manifold
heat shield.
3.Disconnect multiplug from oil pressure switch.
4.Position container below switch to catch oil
spillage.
5.Remove oil pressure switch from oil cooler
housing.

ENGINE - TD5
REPAIRS 12-1-63
Refit
1.Clean oil pressure switch threads.
2.Fit oil pressure switch and tighten to 15 Nm (11
lbf.ft).
3.Connect multiplug to oil pressure switch.
4.Position exhaust manifold heatshield and
tighten M6 bolts to 9 Nm (7 lbf.ft) and M8 bolts
to 25 Nm (18 lbf.ft).
5.Fit and secure engine acoustic cover.
6.Top up engine oil.

+ MAINTENANCE, PROCEDURES,
Engine oil - diesel engine.
Cooler - engine oil
$% 12.60.68
Remove
1.Drain cooling system.

+ COOLING SYSTEM - Td5,
ADJUSTMENTS, Drain and refill.
2.Remove centrifuge assembly.

+ ENGINE - Td5, REPAIRS, Gasket -
centrifuge oil drain pipe.
3.Remove clutch housing bolt and release
coolant pipe from rear of engine.
4.Release clip and coolant hose from oil cooler.
5.Disconnect multiplug from oil pressure switch.
6.Remove full-flow oil filter element using a
suitable strap wrench.
7.Remove 3 bolts, remove oil filter adaptor
housing and discard gasket.
8.Remove 7 bolts, remove oil cooler and discard
gasket.
9.Remove oil pressure switch.

ENGINE - TD5
12-1-64 REPAIRS
Refit
1.Clean oil cooler and mating faces.
2.Fit oil pressure switch and tighten to 9 Nm (7
lbf.ft).
3.Position new gasket and fit oil cooler housing,
tighten bolts to 25 Nm (18 lbf.ft).
4.Position and fit oil filter adaptor housing,
tighten bolts to 25 Nm (18 lbf. ft).
5.Fit oil filter, tighten hand tight then a further half
turn.
6.Position coolant hose to oil cooler and secure
clip.
7.Position coolant pipe bolt and tighten to 50 Nm
(37 lbf.ft) .
8.Connect multiplug to oil pressure switch.
9.Fit centrifuge assembly.

+ ENGINE - Td5, REPAIRS, Gasket -
centrifuge oil drain pipe.
10.Refill cooling system.

+ COOLING SYSTEM - Td5,
ADJUSTMENTS, Drain and refill.
11.Top up engine oil.

+ MAINTENANCE, PROCEDURES,
Engine oil - diesel engine.
Gasket - centrifuge oil drain pipe
$% 12.60.90
Remove
1.Raise front of vehicle.
WARNING: Do not work on or under a
vehicle supported only by a jack. Always
support the vehicle on safety stands.
2.Remove fixings and remove underbelly panel.
3.Remove 2 bolts securing centrifuge drain to
engine sump and discard gasket. (Some
models are fitted with studs and nuts,
others with bolts).
4.Remove turbocharger.

+ ENGINE MANAGEMENT SYSTEM -
Td5, REPAIRS, Turbocharger.
5. Models with air conditioning: Remove
auxiliary drive belt.

+ CHARGING AND STARTING,
REPAIRS, Belt - auxiliary drive.
6. Models with air conditioning: Remove 4 bolts
securing compressor and move to one side.

ENGINE - TD5
OVERHAUL 12-1-75
5.Loosen locknuts and fully unscrew rocker
adjusting screws; discard locknuts and screws.
6.Remove and discard 6 bolts securing rocker
shaft, release shaft from locating dowel and
remove shaft.
7.Using sequence shown, progressively loosen
13 bolts securing camshaft carrier to cylinder
head until valve spring pressure is released;
remove bolts. Do not discard bolts at this
stage.
8.Gently tap camshaft carrier upwards to break
sealant bond, release carrier from locating
dowels; remove carrier.
9.Remove camshaft.
10.Remove and discard camshaft rear oil seal.11.Remove finger followers and lash adjusters.
CAUTION: Store lash adjusters in their fitted
order and store upright. Maintain absolute
cleanliness when handling lash adjusters.
Failure to observe these precautions can
result in engine failure.
12.Remove and discard 5 bolts securing EUI
retainers.
13.Using tool LRT-12-154/1 remove EUI units
from cylinder head and collect retainers;
remove reaction posts. Keep components in
their fitted order.
14.Using tool LRT-12-154/4, remove and discard
sealing washer and 'O' ring from each injector
unit.
15.Support cylinder head clear of valves, use a
hollow drift and tap each spring cap to free
collets.

ENGINE - TD5
12-1-92 OVERHAUL
9.Place a straight edge across pump body and
using feeler gauges, measure end-float of
outer rotor:
lOuter rotor end-float = 0.038 to 0.075 mm
(0.0001 to 0.003 in)
10.Check drive shaft bush in pump cover for signs
of scoring and wear.
11.Renew oil pump and stiffener plate assembly if
excessive scoring or wear exists.
12.Lubricate pump rotors and drive shaft bush with
engine oil.
13.Fit rotors ensuring reference marks are aligned
and identification mark on outer rotor is facing
outwards.
14.Fit cover to pump, fit 5 new screws and tighten
by diagonal selection to 6 Nm (4.5 lbf.ft).
15.Remove and discard oil pressure relief valve
plug.
16.Remove spring and relief valve plunger.
17.Clean valve plunger and spring.
18.Check valve plunger and relief valve bore for
scoring and corrosion, light scoring and
corrosion may be removed using grade 600
emery cloth soaked in oil.19.Check spring for distortion, check free length of
spring:
lSpring free length = 42.0 mm (1.65 in)
20.Lubricate valve plunger and seating.
21.Fit valve plunger and spring to oil pump.
22.Apply Loctite 243 sealant to threads of a new
plug. Do not attempt to fit original plug.
23.Fit plug and tighten to 23 Nm (17 lbf.ft).
Reassembly
1.Clean mating faces of oil pump, stiffener plate
assembly and cylinder block; ensure bolt and
dowel holes are clean and dry.
2.Lubricate a new 'O' ring with engine oil and fit to
oil pump housing outlet.
3.Position oil pump and stiffener plate assembly
on to cylinder block ensuring 2 dowels are
correctly located.
4.Fit new bolts and using sequence shown,
tighten to 13 Nm (10 lbf.ft).
5.Lubricate a new 'O' ring with engine oil and fit to
oil pick-up strainer.
6.Clean threads of oil pick-up strainer Torx
screws and apply Loctite 242 to screw
threads.
7.Fit oil pick-up strainer, fit Torx screws and
tighten to 10 Nm (8 lbf.ft).
8.Position oil pump drive sprocket to chain and oil
pump ensuring that the 'D' shape on the drive
sprocket is located on the flat on the oil pump
drive shaft.
9.Clean oil pump drive sprocket retaining bolt and
apply Loctite 242 to bolt threads.
10.Fit oil pump drive sprocket and tighten bolt to
25 Nm (18 lbf.ft).
11.Fit new sump gasket.

+ ENGINE - Td5, OVERHAUL, Gasket
- engine sump.

ENGINE - V8
DESCRIPTION AND OPERATION 12-2-5
1Core plugs
2Cylinder block
3Camshaft
4Dipstick tube, clamp and bolt
5Woodruff key
6Timing chain
7Camshaft timing gear
8Washer
9Bolt - camshaft timing gear
10Thrust plate - camshaft end-float
11Bolt - camshaft thrust plate
12Gasket - timing cover
13Timing cover
14Oil pressure switch
15Bolt
16Crankshaft front oil seal
17Oil filter element
18Crankshaft front pulley
19Washer
20Bolt - crankshaft front pulley
21Upper main bearing shell
22Upper centre main bearing shell and thrust
washer
23Crankshaft
24Woodruff key
25Crankshaft timing gear
26Lower main bearing shells
27Numbers 1, 2 and 3 main bearing caps
28Bolt - main bearing caps
29Oil pick-up pipe and strainer
30'O' ring31Bolt - oil pick-up pipe
32Gasket - sump
33Sump
34Bolt - sump
35Sump oil drain plug
36Sealing washer
37Spacer, washers and nut - oil pick-up pipe
38Number 4 main bearing cap
39Bolt - connecting rod big-end bearing cap
40Connecting rod big-end bearing shell - lower
41Connecting rod big-end bearing cap
42Number 5 - rear main bearing cap
43Cruciform seal - rear main bearing cap
44Number 5 - rear main bearing shell
45Crankshaft rear oil seal
46Crankshaft knock sensor
47Side bolt - main bearing cap
48Side Allen bolt - main bearing cap
49Dowty washers
50Connecting rod big-end bearing shell - upper
51Connecting rod
52Piston
53Gudgeon pin
54Oil control ring
55Top compression ring
562nd compression ring
57Flywheel/drive plate and starter ring gear
58Bolt - flywheel/drive plate

ENGINE - V8
12-2-6 DESCRIPTION AND OPERATION
Description
General
The V8 petrol engine is an eight cylinder, water cooled unit having two banks of four cylinders positioned at 90 degrees
to each other. The engine comprises five main castings - two cylinder heads, cylinder block, timing cover and the oil
sump, all of which are manufactured from aluminium alloy.
NAS market vehicles from 03 model year receive a 4.6 litre version of the V8 engine to replace the previous 4.0 litre
version.
Cylinder heads
The cylinder heads are fitted with replaceable valve guides and valve seat inserts with the combustion chambers
formed in the head. Each cylinder head is sealed to the cylinder block with a gasket. The exhaust manifolds are bolted
to the outside of each cylinder head whilst the inlet manifolds are located in the centre of the 'Vee' and are bolted to
the inside face of each head. Inlet and exhaust manifolds are sealed to the cylinder heads by means of gaskets.
Each cylinder has a single inlet and exhaust valve. The exhaust valves are of the 'carbon break' type, a recess on the
valve stem prevents a build-up of carbon in the valve guide by dislodging particles of carbon as the valve stem moves
up and down the guide. Inlet and exhaust valve stem oil seals are fitted at the top of each valve guide. Valve operation
is by means of rocker arms, push rods and hydraulic tappets. Each of the rocker arms is located on a rocker shaft
which is supported by means of pedestals bolted to the cylinder heads. A spring, positioned on either side of each
rocker arm, maintains the correct relative position of the arm to its valve stem. The rocker arms are operated directly
by the push rods which pass through drillings in the cylinder heads and cylinder block. The bottom end of each push
rod locates in a hydraulic tappet operated by the single, chain driven camshaft.
The rocker covers are bolted to the cylinder heads and are sealed to the heads by a rubber gasket. Stub pipes for
crankcase ventilation hose connections are fitted to each rocker cover, the pipe in the right hand cover incorporates
an oil separator. The engine oil filler cap is situated in the right hand cover.
Cylinder block and camshaft
The cylinder block is fitted with cast iron cylinder liners which are shrink fitted and locate on stops in the block. The
camshaft is positioned in the centre of the cylinder block and runs in one piece bearing shells which are line bored
after fitting. Camshaft end-float is controlled by a thrust plate bolted to the front of the cylinder block. A timing gear,
chain driven by the crankshaft timing gear is bolted to the front of the camshaft.
Crankshaft and main bearings
The crankshaft is carried in five main bearings. The upper main bearing shell locations are an integral part of the
cylinder block casting. The lower main bearing caps are bolted to the cylinder block on either side of the upper bearing
shell locations with an additional bolt being inserted into each cap from either side of the cylinder block. The rear
main bearing cap carries the crankshaft rear oil seal and is sealed to the cylinder block by means of cruciform shaped
seals in each side of the cap. Number four main bearing cap carries the stud fixing for the oil pick-up pipe. Lower
main bearing shells are plain whilst the upper shells have an oil feed hole and are grooved. Crankshaft end-float is
controlled by the thrust faces of the upper centre shell. The crankshaft timing gear is located on the front of the
crankshaft by means of a Woodruff key which is also used to drive the gear type oil pump. The flywheel/drive plate
carries the crankshaft position sensor reluctor ring and is dowel located and bolted to the flywheel.
Timing cover
The timing cover is bolted to the front of the cylinder block and is sealed to the block with a gasket. The disposable,
full flow oil filter canister is screwed on to the timing cover which also carries the oil pressure switch, oil pressure relief
valve and crankshaft front oil seal. The gear type oil pump is integral with the cover which also has an internal oilway
to direct oil from the oil cooler to the filter.
NOTE: Oil coolers are only fitted to vehicles up to VIN 756821.