1999 LAND ROVER DISCOVERY air filter

MAINTENANCE
10-18 PROCEDURES
Automatic gearbox
WARNING: Avoid excessive skin contact with
mineral oil. Mineral oils remove the natural fats
from the skin, leading to dryness, irritation and
dermatitis.
Replace oil filter
1.Replace oil filter.

+ AUTOMATIC GEARBOX - ZF4HP22
- 24, REPAIRS, Filter - oil.
Replace oil
1. Ensure that gearbox is cool. Apply
handbrake and securely chock front and rear
wheels.
2.Place a suitable container beneath gearbox.
3.Clean area around oil filler/level and drain
plugs.
4.Remove oil drain plug, remove and discard
sealing washer.
5.Allow oil to drain.
6.Fit new sealing washer to oil drain plug.
7.Fit automatic gearbox drain plug and tighten to
15 Nm (11 lbf.ft).
8.Remove oil filler/level plug, remove and discard
sealing washer.
9.Fill gearbox with recommended oil to bottom of
oil level/filler plug hole.

+ CAPACITIES, FLUIDS,
LUBRICANTS AND SEALANTS,
Lubrication.
10.Select 'P' (Park).
11.Ensure handbrake is applied.
12.Start engine and allow it to idle.
13.Apply footbrake. 14.Move selector lever through all gear positions,
while continuing to fill the gearbox. Select 'P'
(Park).
15.With engine idling, continue filling gearbox until
a 2 mm bead of oil runs from oil filler/level plug
hole.
16.Fit new sealing washer to automatic gearbox
filler/level plug, fit plug and tighten to 30 Nm (22
l b f . f t ) .
17.Stop engine.
18.Remove all traces of oil from gearbox casing.

MAINTENANCE
PROCEDURES 10-23
ACE actuators
Check
Actuator boots
1.Check ACE actuator gaiters for splits, damage
and clips for security.
ACE filter
Replace
1.Replace ACE filter.

+ FRONT SUSPENSION, REPAIRS,
Filter - high pressure - ACE.

ENGINE - V8
DESCRIPTION AND OPERATION 12-2-9
Oil is drawn from the sump through a strainer and into the oil pump via the oil pick-up pipe. Pressurised oil from the
pump passes through the oil cooler (if fitted) mounted in front of the radiator and returns to the full flow oil filter
element. Oil from the filter passes into the main oil gallery and through internal drillings to the crankshaft where it is
directed to each main bearing and to the big-end bearings via numbers 1, 3 and 5 main bearings. An internal drilling
in the cylinder block directs oil to the camshaft where it passes through further internal drillings to the hydraulic
tappets, camshaft bearing journals and rocker shafts. Lubrication to the pistons, small ends and cylinder bores is by
oil grooves machined in the connecting rods and by splash.
Oil pressure switch
The oil pressure warning light switch registers low oil pressure in the main oil gallery on the outflow side of the filter.
Whilst the engine is running and oil pressure is correct, the switch is open. When the ignition is switched on or if oil
pressure drops below the pressure setting of the switch, the switch closes and the low oil pressure warning lamp
located in the instrument pack will illuminate.
Hydraulic tappets
1Clip
2Pushrod seat
3Inner sleeve
4Upper chamber5Non-return ball valve
6Spring
7Outer sleeve
8Lower chamber
The hydraulic tappet provides maintenance free, quiet operation of the valves. This is achieved by utilizing engine oil
pressure to eliminate the clearance between the rocker arms and valve stems. When the valve is closed, engine oil
pressure present in the upper chamber, passes through the non-return ball valve and into the lower chamber. When
the cam begins to lift the outer sleeve, the resistance of the valve spring, felt through the push rod and seat, causes
the tappet inner sleeve to move downwards inside the outer sleeve. This downwards movement closes the non-return
ball valve and increases the pressure in the lower chamber sufficiently to ensure that the valve is fully opened by the
push rod. As the tappet moves off the peak of the cam, the non-return ball valve opens thereby allowing the pressure
in both chambers to equalize. This ensures that the valve will be fully closed when the tappet is on the back of the
cam.
Crankcase ventilation
A positive crankcase ventilation system is used to vent crankcase gases to the air induction system. Gases are drawn
from the left hand rocker cover to a tapping in the throttle body. An oil separator is incorporated in the hose connection
stub pipe in the right hand rocker cover, gases from this connection are drawn to a tapping in the inlet manifold.

+ EMISSION CONTROL - V8, DESCRIPTION AND OPERATION, Crankcase Emission Control System.

ENGINE - V8
12-2-26 REPAIRS
Engine assembly
$% 12.41.01.99
Remove
1.Drain engine oil and remove oil filter.
2.Remove radiator.

+ COOLING SYSTEM - V8, REPAIRS,
Radiator.
3.Remove upper inlet manifold.

+ MANIFOLDS AND EXHAUST
SYSTEMS - V8, REPAIRS, Gasket - inlet
manifold - upper - Without Secondary Air
Injection.
4.Remove ignition coil assemblies.
5.Position absorbent material to catch spillage
and disconnect fuel pipe from fuel rail.
CAUTION: Always fit plugs to open
connections to prevent contamination.
6.Release 2 hose clips and remove top hose.
7.Using a 15 mm spanner, release auxiliary drive
belt tension and remove drive belt. 8.Remove 3 bolts securing ACE pump, release
pump and tie aside.
9.Disconnect multiplug from A/C compressor.
10.Remove 4 bolts securing A/C compressor,
release compressor and tie aside.

ENGINE - V8
12-2-30 REPAIRS
Refit
1.Clean mating faces of engine and gearbox,
dowel and dowel holes.
2.Lubricate splines and bearing surface on first
motion shaft with grease.
3.With assistance position engine in engine bay,
align to gearbox and locate on dowels.
4.Position support brackets, fit bell housing bolts
and tighten to 50 Nm (37 lbf.ft).
5.Position engine mountings, fit nuts and tighten
to 85 Nm (63 lbf.ft).
6.Lower lifting equipment and remove from
engine.
7. Models with automatic gearbox: Align torque
converter to drive plate, fit bolts and tighten to
50 Nm (37 lbf.ft). Fit access plug.
8.Fit exhaust front pipe.

+ MANIFOLDS AND EXHAUST
SYSTEMS - V8, REPAIRS, Front pipe.
9.Position oil cooling pipe saddle clamps and
tighten bolts.
10.Position engine harness into foot well.
11.Connect 5 multiplugs to ECM.
12.Fit toe board and secure with trim fixings.
13.Connect engine harness earth to body and
secure with nut.
14.Connect engine harness to main harness
multiplug.
15.Connect multiplug to EVAP purge valve.
16.Connect engine harness multiplugs to fuse
box.
17.Connect starter lead to fuse box and secure
with nut.
18.Connect engine harness positive lead to
battery and tighten nut.
19.Fit fuse box cover.
20.Position engine earth lead and secure with
bolt.
21.Position coolant rail and secure with bolt.
22.Connect harness clips to coolant rail.
23.Connect hose to coolant rail and coolant pump
and secure with clips.
24.Connect PAS pump high and low pressure
pipes and secure with clips.
25.Position oil cooling pipe saddle clamp to PAS
pump housing and secure with bolt.
26.Clean A/C compressor and housing mating
faces, dowels and dowel holes.
27.Position A/C compressor, fit bolts and tighten
to 22 Nm (16 lbf.ft).
28.Connect multiplug to A/C compressor.
29.Clean ACE pump and housing mating faces,
dowels and dowel holes.
30.Position ACE pump, fit bolts and tighten to 22
Nm (16 lbf.ft). 31.Clean all pulley 'V's, fit auxiliary drive belt,
using a 15mm spanner, release belt tensioner
secure belt and re-tension drive belt .
32.Ensure auxiliary drive belt is correctly located
on all pulleys.
33.Fit radiator.

+ COOLING SYSTEM - V8, REPAIRS,
Radiator.
34.Fit top hose and secure with clips.
35.Connect fuel pipe to fuel rail.
36.Position ignition coils and connect ht leads.
37.Fit upper inlet manifold.

+ MANIFOLDS AND EXHAUST
SYSTEMS - V8, REPAIRS, Gasket - inlet
manifold - upper - Without Secondary Air
Injection.
38.Fit new oil filter and refill engine with oil.

+ ENGINE - V8, REPAIRS, Filter - oil.

+ MAINTENANCE, PROCEDURES,
Engine oil - V8 engine.
39.Top up gearbox oil.

+ MAINTENANCE, PROCEDURES,
Automatic gearbox.

ENGINE - V8
REPAIRS 12-2-35
Filter - oil
$% 12.60.04
Remove
1.Clean area around filter head and place a
container beneath engine.
2.Using a strap wrench, unscrew and discard
filter.
Refit
1.Clean mating face of filter head.
2.Lubricate sealing ring of new filter with clean
engine oil.
3.Fit filter and tighten by hand until it seats then
tighten a further half turn.
4.Start and run engine to check for leaks.
5.Stop engine, wait a few minutes, then check oil
level.
6.Top up engine oil.
Strainer - oil pick-up
$% 12.60.20
Remove
1.Remove sump gasket.

+ ENGINE - V8, REPAIRS, Gasket -
sump.
2.Remove 2 bolts and one nut securing oil pick-
up strainer.
3.Remove oil pick-up strainer.
4.Collect spacer from stud.
5.Remove and discard 'O'ring.
Refit
1.Clean oil pick up strainer and 'O' ring recess.
2.Lubricate and fit new 'O' ring.
3.Locate spacer on stud.
4.Position oil pick-up strainer, fit bolts and tighten
to 10 Nm (8 lbf.ft). Fit nut and tighten to 22 Nm
(16 lbf.ft).
5.Fit new sump gasket.

+ ENGINE - V8, REPAIRS, Gasket -
sump.

ENGINE - V8
12-2-36 REPAIRS
Pump - oil
$% 12.60.26
Remove
1.Remove timing gear cover gasket.

+ ENGINE - V8, REPAIRS, Gasket -
timing gear cover.
2.Remove bolt securing CMP sensor, remove
clamp and sensor.
3.Remove 6 bolts securing coolant pump,
remove pump and discard gasket.
4.Remove oil pressure switch and discard
sealing washer.
5.Remove 4 bolts securing oil filter head, remove
filter head and discard 2 'O' rings.
6.Remove filter head adaptor. Refit
1.Ensure filter head adaptor is clean.
2.Fit filter head adaptor and tighten bolts to 13
Nm (9 lbf.ft).
3.Clean filter head and mating face.
4.Fit new 'O' rings to filter head and filter head
adaptor.
5.Fit filter head and tighten bolts to 8 Nm (6 lbf.ft).
6.Ensure oil pressure switch and mating face is
clean.
7.Fit new sealing washer and tighten switch to 15
Nm (11 lbf.ft).
8.Clean coolant pump and mating face.
9.Use a new gasket and fit coolant pump.
Tighten bolts securing coolant pump to 25 Nm
(19 lbf.ft).
10.Ensure CMP sensor is clean and fit sensor to
cover.
11.Fit clamp to CMP sensor and tighten bolt to 8
Nm (6 lbf.ft).
12.Fit timing gear cover gasket.

+ ENGINE - V8, REPAIRS, Gasket -
timing gear cover.

ENGINE - V8
REPAIRS 12-2-41
Gasket - timing gear cover
$% 12.65.04
Remove
1.Remove oil pick-up strainer.

+ ENGINE - V8, REPAIRS, Strainer -
oil pick-up.
2.Remove timing gear cover oil seal.

+ ENGINE - V8, REPAIRS, Seal - cover
- timing gears.
3.Remove engine oil filter.

+ ENGINE - V8, REPAIRS, Filter - oil.
4.Remove and discard 3 bolts securing coolant
pump pulley and remove pulley.
5.Remove 3 bolts securing PAS pump pulley and
remove pulley.
6.Drain cooling system.

+ COOLING SYSTEM - V8,
ADJUSTMENTS, Drain and refill.7.Release clip and disconnect coolant hose from
coolant pump.
8.Disconnect multiplug from oil pressure switch.
9.Disconnect multiplug from CMP sensor.
10. If fitted: Loosen union and disconnect oil
cooler pipe from timing gear cover. Remove
and discard 'O' ring.
CAUTION: Always fit plugs to open
connections to prevent contamination.
11.Remove 9 bolts securing timing gear cover and
remove cover. Remove and discard gasket.