1995 LAND ROVER DISCOVERY oil level

V8i
1
FAULT DIAGNOSIS ENGINE OIL PRESSURE TEST
Service tools:
LRT-12-052: Pressure test equipment
WARNING: Use suitable exhaust
extraction equipment, if test is being
carried out in workshop.
WARNING: If vehicle has been running,
engine oil will be hot, care must be taken
when fitting equipment to prevent
personal injury due to scalding.
Test
1.Check lubricant is to correct level.
2.Place vehicle on a ramp [hoist].
3.Disconnect battery negative lead. Remove oil
pressure switch.
4.Fit the test gauge.
5.Reconnect battery negative lead.
6.Start and run engine to normal operating
temperature.
7.At a steady engine speed of 2500 rev/min -
engine oil pressure reading should be - 2.75 bar
(40 lbf/in
2).
8.If the pressure is low - Remove and overhaul oil
pump
CYLINDER COMPRESSION - TEST
Equipment:
Compression pressure gauge
Test
1.Start and run engine until normal engine
operating temperature is achieved (thermostat
open).
2.Remove all spark plugs.
3.Disconnect both coil negative (WB) leads
4.Insert compression gauge, crank engine until
reading stabilises.
5.Expected readings, throttle fully open, battery
fully charged:
8.31:1 = 10.2-10.9 bar, 150-160lbf/in
2
9.35:1 = 11.5-12.2 bar, 170-180lbf/in2

12ENGINE
2
FAULT DIAGNOSIS ENGINE NOISES
Excessive or obtrusive noise from the engine
compartment originates from three main sources:
A. The exhaust system, which makes an
unmistakable and easy to diagnose noise.
B. External components emit the greatest variety of
noises, but are also easy to diagnose by simply
removing the drive belt.
C. Engine internal mechanical noises which can
vary in volume and pitch and may be a
combination of, tapping - knocking or rumbling,
are the most difficult to diagnose. The following
is therefore a guide to diagnosis of engine
internal mechanical noises only.
Engine internal mechanical noises.
Single or multiple, light tapping noise, particularly
when engine is cold.
See Description and
operation, Description
1.Is engine oil level correct?
NO - Top up to correct level.
See
LUBRICANTS, FLUIDS AND
CAPACITIES, Information,
Recommended Lubricants and Fluids
YES - Continue.
2.Is the lubricating pressure correct?
NO -
See Engine Oil Pressure Test
YES - Suspect valve operating mechanism.
3.To confirm diagnosis, remove the rocker covers
and with the engine idling, insert a feeler gauge
of 0,015mm between each rocker and valve
stem. A faulty valve operating mechanism will
emit a different noise when the feeler gauge is
inserted.
See Repair, Rocker Shaft Renew
Heavy knocking noise (particularly on load and
when engine is hot).
See Description and
operation, Description
1.Is engine oil level correct?
NO - Top up to correct level.
See
LUBRICANTS, FLUIDS AND
CAPACITIES, Information,
Recommended Lubricants and Fluids
YES - Continue.
2.Is the lubricating pressure correct?
NO -
See Engine Oil Pressure Test
YES - Drain engine oil and filter, and examine
for metallic contamination.
3.Is the oil contaminated with metal particles?
YES - Suspect faulty big end bearings. To
confirm diagnosis, short out the ignition to
each spark plug in turn. The noise will
disappear or be reduced when the
cylinder with the faulty big end is shorted
out.
4.If noise is not conclusively diagnosed, check the
security of the flywheel and crankshaft front
pulley. Temporarily release the drive belt to
reduce general noise level and use a
stethoscope to locate source of noise.
Heavy rumbling noise (particularly during hard
acceleration).
See Description and operation,
Description
1.Is engine oil level correct?
NO - Top up to correct level.
See
LUBRICANTS, FLUIDS AND
CAPACITIES, Information,
Recommended Lubricants and Fluids
YES - Continue.
2.Is the lubricating pressure correct?
NO -
See Engine Oil Pressure Test
YES - Drain engine oil and filter, and examine
for metallic contamination.
3.Is the oil contaminated with metal particles?
YES - Suspect faulty main bearings. If noise is
not conclusively diagnosed, check the
security of the flywheel and crankshaft
front pulley. Temporarily release the drive
belt to reduce general noise level and use
a stethoscope to locate source of noise.

12ENGINE
12
REPAIR
12.Ensure service tools LRT-12-010 and
LRT-12-091 are scrupulously clean. Coat seal
guide and oil seal journal with clean engine oil.
CAUTION: Do not handle oilseal lip, check
it is not damaged. Ensure outside diameter
remains clean and dry.
13.Position oil seal guide LRT-12-010 on crankshaft
flange.
NOTE: Lubricant coating must cover seal
guide outer surface completely to ensure
that oil seal lip is not turned back during
assembly. Position oil seal, lipped side towards
engine, on seal guide. Seal outside diameter
MUST be clean and dry.
14.Fit oil seal using tool LRT-12-091. Remove seal
guide.
15.Tighten rear main bearing cap to
90 Nm.
16.Fit sump.
17.Fit flywheel or flexible drive plate and ring gear.ENGINE
Service repair no - 12.41.01
Remove
1.Park vehicle on level ground and apply park
brake.
2.De-pressurise fuel system.
See FUEL
SYSTEM, Repair, Depressurising Fuel
System
3.Remove bonnet [hood].See CHASSIS AND
BODY, Repair, Bonnet [Hood]
4.Remove battery.See ELECTRICAL, Repair,
Battery
5.Remove radiator/oil coolers.See COOLING
SYSTEM, Repair, Radiator/Oil Coolers
6.Place an absorbent cloth around fuel feed hose
at fuel rail and release compression nut.
Remove feed hose from rail, seal end of pipes
with masking tape to prevent ingress of dirt.
7.Release fuel return hose clamp and remove
hose from pressure regulator, seal both
openings with masking tape to prevent ingress of
dirt.
8.Remove vacuum hose from rear of regulator.
9.Manual vehicles: Disconnect throttle cable from
bracket. Automatic vehicles: Detach throttle
bracket from plenum chamber and lay assembly
to one side.
See FUEL SYSTEM, Repair,
Plenum Chamber DO NOT DISTURB KICK
DOWN CABLE SETTING.
10.Remove ram housing.See FUEL SYSTEM,
Repair, Ram Housing
11.Remove air flow sensor.See FUEL SYSTEM,
Repair, Air Flow Sensor
12.Remove air cleaner assembly.See FUEL
SYSTEM, Repair, Air Cleaner Assembly
13.Remove Generator.See ELECTRICAL,
Description and operation, Generator
14.Release air conditioning compressor from its
mounting and lay to one side. DO NOT
discharge air conditioning system.
See AIR
CONDITIONING, Repair, Compressor

V8i
13
REPAIR
NOTE: Release bolts securing compressor
mounting bracket to engine and remove
bracket to enable temporary lifting eye
ETC 5964 to be fitted. Secure lifting eye to
mounting bracket fixing points with suitable bolts
of equivalent size, pitch and thread. Leave lifting
eye attached until engine is reinstalled in vehicle.
15.Place drain tray underneath vehicle.
16.Disconnect hose from reservoir to power
steering pump. Secure hose end above level of
fluid reservoir to avoid unnecessary loss of fluid.
17.Disconnect power steering pump to power
steering box hose. Seal hose and pump
openings with masking tape to prevent ingress of
dirt. Wipe away any fluid spillage from chassis or
steering box.
18.Disconnect fuel temperature and coolant
temperature sensor multi-plugs.
19.Disconnect leads from coil.
20.Identify each injector multi-plug for re-assembly
and disconnect plugs from injectors.
21.Manoeuvre harness from behind fuel rails and
place to one side clear of engine assembly.
22.Remove two clamps securing gearbox oil cooler
pipes to engine block.
23.Remove engine mounting fixings on both sides
of cylinder block.
24.Fit lifting chains to engine lifting eyes as shown
in illustration RR1780E.
1. L/H Front chain 356mm total overall length.
2. R/H Front chain 330mm total overall length.
3. R/H Rear chain 457mm total overall length.
NOTE: All chain dimensions are measured
from end of lifting hook to end of last link
in chain.
25.Fit chain lifting eye to a suitable engine hoist.
Raise hoist high enough to enable engine
mountings to be removed, and withdraw rubber
mountings.
26.Lower hoist until engine rests securely on engine
mounting brackets. Remove lifting chains and
hoist.
27.Disconnect two heater hoses located on top of
right hand rocker cover.
28.Remove ground strap from rear of left hand
cylinder head. DO NOT remove from retaining
clip.
29.Remove all electrical harnesses from retaining
clips at rear of engine.
30.Remove transmission breather pipes from
retaining clip on rear lifting eye.
31.Remove top two bolts securing bell housing to
cylinder block.
32.Raise front of vehicle, lower vehicle on to axle
stands.
33.Remove bell housing bottom cover. Remove
gasket from bell housing face.
34.Remove nuts securing exhaust downpipes to
manifolds, remove heat shield from right hand
side downpipe.
35.Remove electrical leads from starter motor
solenoid. Disconnect multi-plug from oil level
sensor on side of sump, if fitted.
NOTE: Instructions 37, 38 and 39 refer to
automatic vehicles only.
36.With assistance rotate engine at crankshaft
pulley until two access holes in drive plate/ring
gear assembly are visible.
37.Remove two bolts visible through access holes.
Mark one access hole and one bolt hole to
ensure unit is reassembled in its original position
38.Rotate crankshaft 180Ê until two remaining
access holes are visible, remove two bolts.

V8i
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REPAIR OIL SUMP
Service repair no - 12.60.44
Remove
1.Drain engine oil
See SECTION 10,
Maintenance, Under Vehicle Maintenance
2.Fit drain plug. Tighten to40 Nm.
3.If fitted, disconnect low oil level sensor multiplug.
4.Remove bolt securing dipstick tube to rocker
cover.
5.Working form the centre outwards, progressively
loosen and remove 17 bolts securing sump.
Remove sump.
6.Remove all traces of sealant from mating
surfaces of sump, cylinder block and front cover,
using a suitable solvent or plastic scraper.
7.Degrease mating surfaces of sump, cylinder
block and front cover.Refit
8.Apply RTV Hylosil White sealant to mating
surface of sump.
9.Position sump, tighten bolts finger tight.
10.Tighten bolts progressively in sequence shown.
Tighten to
18 Nm.
11.Fit bolt securing dipstick tube to rocker cover.
12.If fitted, connect low oil level sensor multiplug.

Tdi
3
REPAIR TURBOCHARGER OIL FEED PIPE
Service repair no - 19.42.14
Remove
1.Disconnect battery negative lead.
2.Remove exhaust front pipe.
See MANIFOLD
AND EXHAUST SYSTEM, Repair, Manifold
and Exhaust System - Tdi
3.Remove banjo bolt securing oil feed pipe to
turbocharger, discard 2 sealing washers.
4.Unscrew union, disconnect oil feed pipe from
cylinder block.
CAUTION: Plug the connections.
5.Move oil feed pipe from behind turbocharger and
remove.
Refit
6.Reverse removal procedure. use new sealing
washers.
7.Tighten banjo bolt to
20 Nm.
8.Check/top-up engine oil level.TURBOCHARGER OIL DRAIN PIPE
Service repair no - 19.42.12
Remove
1.Disconnect battery negative lead.
2.Remove exhaust front pipe.
See MANIFOLD
AND EXHAUST SYSTEM, Repair, Manifold
and Exhaust System - Tdi
3.Unscrew union and disconnect oil drain pipe
from cylinder lock.
4.Remove 2 bolts securing oil drain pipe to
turbocharger.
5.Remove oil drain pipe, remove and discard
gasket.
CAUTION: Plug the connection.
Refit
6.Ensure mating surfaces of oil pipe, turbocharger
and engine block are clean.
7.Reverse removal procedure. Use a new gasket.
8.Tighten oil drain pipe to turbocharger bolts to
25
Nm.
9.Check/top-up engine oil level.

19FUEL SYSTEM
4
REPAIR TURBOCHARGER ACTUATOR
Service repair no - 19.42.31
Remove
1.Remove exhaust manifold and turbocharger.
See MANIFOLD AND EXHAUST SYSTEM,
Repair, Exhaust Manifold - Tdi
2.Remove 2 nuts securing the actuator to the
turbocharger bracket.
3.Release clip and disconnect hose from actuator.
4.Remove and discard clip securing control lever
to wastegate spindle.
5.Remove turbocharger actuator.
Refit
6.Fit the replacement actuator and secure with
nuts.
7.Push the control lever as far as possible towards
the actuator and apply pressure to keep the
lever in this position.
8.Pressurise the actuator to 57 - 62 cm Hg and
hold this pressure.
CAUTION: Use only the threaded end of
the lever to make adjustments. Forcing the
complete lever in or out will change the
calibration with the possibility of damaging engine
boost.
9.Screw the lever in either direction until the eye
on the end will locate easily over the wastegate
spindle and secure with a new clip.
10.Release the pressure and tighten the locknut.
11.Refit exhaust manifold and turbocharger.
See
MANIFOLD AND EXHAUST SYSTEM, Repair,
Exhaust Manifold - Tdi
TURBOCHARGER AND GASKET
Service repair no - Turbocharger - 19.42.01
Service repair no - Gasket - 19.42.25
Remove
1.Disconnect battery negative lead.
2.Remove air cleaner assembly.
See Air Cleaner
3.Remove exhaust manifold assembly.See
MANIFOLD AND EXHAUST SYSTEM, Repair,
Exhaust Manifold - Tdi
4.Remove and discard clip securing control lever
to wastegate spindle.
5.Remove 4 bolts and 2 clamp plates securing
turbocharger to exhaust manifold.
6.Remove turbocharger and discard gaskets.
Refit
7.Clean mating faces of turbocharger and exhaust
manifold.
8.Reverse removal procedure. Use new clip to
secure control lever to wastegate spindle.
Tighten to
45 Nm.
9.Check/top-up engine oil level.

Mpi
1
DESCRIPTION AND OPERATION DESCRIPTION
The Mpi Modular Engine Management System
(MEMS) controls the fuel injection and programmed
ignition systems.
The main features are as follows:
·The Engine Control Module (ECM) controls
programmed ignition and fuel injection. The ECM
incorporates short circuit protection and can
store intermittent faults on certain inputs.
Testbook can interrogate the ECM for these
stored faults.
·The ECM uses the speed/density method of air
flow measurement to calculate fuel delivery. This
method measures the inlet air temperature and
inlet manifold pressure and assumes that the
engine is a calibrated vacuum pump with its
characteristics stored in the ECM
·If certain system inputs fail, the ECM implements
a back-up facility to enable the system to
continue functioning, although at a reduced level
of performance.
·A separate diagnostic connector allows engine
tuning or fault diagnosis to be carried out using
Testbook without disconnecting the ECM
harness connector.
·The ECM harness multiplug incorporates
specially plated pins to minimise oxidation and
give improved reliability.
·The throttle potentiometer requires no
adjustment in service. The following components
supply data for both fuelling and ignition:Ignition system
The ECM determines the optimum ignition timing
based on the signals it receives from the following
sensors:
1.Crankshaft sensor - Engine speed and
crankshaft position.
2.Manifold absolute pressure sensor - Engine load
3.Coolant temperature sensor - Engine
temperature.
4.Manifold absolute pressure sensor - Throttle
closed.
5.Knock sensor - Engine noise and vibration.
MEMS uses no centrifugal or vacuum advance, timing
being controlled by the ECM which is energised by the
main relay, within the relay module. Spark distribution
is achieved by 2 coils mounted at the rear of the
engine and controlled by the ECM.