1995 LAND ROVER DISCOVERY air conditioning

12ENGINE
10
REPAIR
38.Disconnect 2 ignition coil multiplugs.
39.Disconnect 3 vacuum hoses from manifold.
40.Release cover and remove bolt securing earth
lead to cylinder block.
41.Move earth lead aside.
42.Remove 4 bolts securing air conditioning
compressor, move compressor aside.

12ENGINE
12
REPAIR 51.Remove engine L.H. and R.H. mounting lower
nuts.
52.Lower vehicle.
53.Raise engine.
54.Remove engine mountings.
55.Lower engine.
56.Remove bell housing top nut.
57.Raise engine and support gearbox.58.Remove 12 remaining bell housing nuts.
59.Remove engine.
Refit
NOTE: For torque values.See
Specifications, torque, Torque Values
1.Using assistance, lower engine into position.
2.Fit bell housing nuts, tighten to the correct
torque.
3.Remove gearbox support.
4.Lower engine.
5.Fit bell housing top nut, tighten to the correct
torque.
6.Raise engine.
7.Position engine mountings, partially tighten nuts.
8.Lower engine.
9.Remove hoist and chains.
10.Tighten L.H. and R.H. mounting nuts to the
correct torque. Fit engine mounting heatshield.
11.Fit new gasket to exhaust downpipe.
12.Fit exhaust manifold to downpipe nuts and
tighten to the correct torque.
13.Tighten exhaust downpipe to silencer box nuts
to the correct torque.
14.Position air conditioning compressor and secure
with bolts. Tighten to the correct torque.
15.Connect coil multiplugs.
16.Connect harness to starter solenoid and secure
with nuts.
17.Connect earth lead to cylinder block and secure
with nut.
18.Position engine harness to manifold, secure with
bolts.

Mpi
13
REPAIR 19.Connect crankshaft sensor, knock sensor, air
conditioning compressor, fuel injector harness,
inlet manifold air temperature and fuel
temperature sensor multiplugs.
20.Connect fuel hose to pressure regulator and
secure with clip.
21.Fit and tighten fuel pipe to fuel rail union.
22.Connect multiplugs to throttle housing.
23.Connect vacuum hose to manifold.
24.Connect oil pressure switch multiplug.
25.Connect brake servo hose to manifold, secure
with clip.
26.Connect throttle cable to cam.
27.Position engine harness and connect breather
hose to inlet manifold, secure with clip.
28.Connect coolant temperature sensor multiplugs,
secure harness with cable tie.
29.Connect oxygen sensor multiplug, secure
harness with cable tie.
30.Connect alternator harness.
31.Connect heater hose to heater rail and secure
with clip.
32.Connect hose to coolant pump and secure with
clip.
33.Connect inlet hose to power steering pump and
secure with clip.
34.Fit and tighten outlet pipe union to power
steering pump.
35.Connect bypass and top hose, secure with clip.
36.Connect air cleaner to throttle housing hose and
secure with clip.
37.Remove engine lifting bracket.
38.Position spark plug cover and secure with
screws.
39.Fill engine with oil.
40.Fit bonnet [hood].
See CHASSIS AND BODY,
Repair, Bonnet [Hood]
41.Fit radiator.See COOLING SYSTEM, Repair,
Radiator - Mpi
42.Adjust throttle cable.See FUEL SYSTEM,
Adjustment, Throttle Cable Adjustment
ENGINE SUMP GASKET
Service repair no - 12.60.43
Remove
1.Drain engine oil.
2.Refit drain plug, use new sealing washer if
necessary, tighten to the correct torque.
3.Remove 18 bolts securing sump.
NOTE: 25mm long bolt is fitted at rear L.H.
corner of sump.
4.Release sump from cylinder block.
5.Discard gasket.

Mpi
1
SPECIFICATIONS, TORQUE TORQUE VALUES
NOTE: Torque wrenches should be regularly checked for accuracy to ensure that all fixings are
tightened to the correct torque.
Nm
ENGINE
Timing belt upper cover bolts 5......................................................................
Timing belt centre cover bolts 5.....................................................................
Timing belt lower cover bolts 5......................................................................
Crankshaft pulley centre bolt 85.....................................................................
Crankshaft pulley to timing gear bolts 10........................................................
Tensioner pulley bolt 30..................................................................................
Spark plugs 27................................................................................................
Timing belt upper backplate bolts 10..............................................................
Camshaft gear bolts 65...................................................................................
Exhaust camshaft rear oil seal cover plate bolts 10........................................
Inlet camshaft rear oil seal cover plate bolts 10..............................................
Crankshaft rear oil seal housing bolts 10........................................................
Engine sump bolts
Stage 1 3...............................................................................................
Stage 2 10..............................................................................................
Bell housing nuts 40........................................................................................
L.H. and R.H. engine mounting nuts 85..........................................................
Exhaust manifold to downpipe nuts 10...........................................................
Exhaust downpipe to silencer box nuts 30......................................................
Air conditioning compressor to engine block bolts 45.....................................
Cylinder head bolts
Stage 1 45..............................................................................................
Stage 2 80..............................................................................................
Stage 3 - Further 90°
Camshaft cover bolts 10.................................................................................
Knock sensor 15.............................................................................................
Ignition coil bracket bolts 25............................................................................
Coolant temperature sensor 15......................................................................
Crankshaft sensor bolts 7..............................................................................
Fuel temperature sensor 7.............................................................................
Intake air temperature sensor 7.....................................................................
Fuel rail to inlet manifold bolts 10...................................................................
Fuel feed hose stiffening bracket bolts 7.......................................................
Throttle housing mounting nuts 7...................................................................
Fuel pressure regulator steady bracket bolts 7..............................................
Oxygen sensor 55...........................................................................................

Tdi
7
REPAIR
9.Move intercooler upwards and clear of fan cowl.
Refit
10.Ensure locatiing lug grommets are fitted and in
good condition.
11.Ensure foam pad is in good condition and
attached to intercooler.
12.Move intercooler into position.
13.Reverse removal procedure.GLOW PLUGS
Service repair no - 19.60.31
Remove
1.Disconnect battery negative lead.
No.1 glow plug - air conditioning models
2.Release drive belt from compressor pulley.See
ENGINE, Repair, Drive Belt Renew
3.Remove 4 bolts securing compressor to front
cover, move compressor aside.
No.3 glow plug
4.Remove bolt securing Hummel valve, withdraw
valve, remove and discard 'O' ring.

19FUEL SYSTEM
8
REPAIR
All glow plugs
5.Remove terminal nut from glow plug, disconnect
wire from glow plug terminal.
6.Remove glow plug.
Refit
7.Clean glow plug and seating.
8.Coat threads of glow plug with suitable anti-seize
compound operational to a temperature of
1000°C.
9.Fit glow plug. Tighten to
23 Nm.
10.Connect wire to glow plug terminal and secure
with nut.
NOTE: Feed wire must be connected to
No. 4 glow plug terminal.
11.
No. 3 glow plug:Lubricate new 'O' ring with
engine oil and fit to Hummel valve. Fit valve and
secure with bolt. Tighten to
15 Nm.
No. 1 glow plug - air conditioning models
12.Position compressor to front cover, fit bolts.
Tighten to
25 Nm.
13.Fit drive belt to compressor pulley and adjust
tension.
See ENGINE, Repair, Drive Belt
Renew
All models
14.Reconnect battery negative lead.EGR VALVE
Service repair no - 19.45.01
Remove
1.Disconnect multiplug from EGR valve.
2.Disconnect vacuum pipe from EGR valve.
3.Remove 2 Allen screws securing EGR valve to
exhaust manifold.
4.Remove 2 bolts securing hose to EGR valve.
5.Remove EGR valve and discard gaskets.
Refit
6.Clean mating faces of EGR valve and exhaust
manifold.
7.Reverse removal procedure. Tighten bolts to
25
Nm.

19FUEL SYSTEM
2
FAULT DIAGNOSIS BASE IDLE SPEED SETTING
NOTE: Base idle speed is set at factory. It
should not require further adjustment
unless plenum chamber is changed. The
adjustment screw is sealed with a plug to prevent
unauthorised alteration. Check ignition timing
before attempting following procedure, since this
will affect idle speed.
Equipment required
Two blanking hoses.these are manufactured using
a new air by-pass valve hose - Part No.ETC7874. Cut
two equal pieces 90mm long from hose and seal one
end of each, using 13mm diameter bar. Use a suitable
clamp to ensure an air tight seal.
Checking procedure
1.Drive vehicle at least two miles until engine and
transmission are hot. Switch off engine.
2.Check all electrical loads are OFF, including air
conditioning.
3.Remove air by-pass valve hose.
4.Fit blanking hoses to both plenum chamber and
air by-pass valve. Ensure hoses are securely
fitted to prevent air leaks. Note throttle cable and
cruise control actuator have been omitted from
illustration.5.Start engine and check idle speed is within
limits.
See ENGINE TUNING DATA,
Information, Engine 3.9 v8i
Adjusting base idle speed
6.Drill tamper proof plug and insert a self tapping
screw to enable plug to be extracted.
7.Start engine, adjust idle screw clockwise to
decrease or counter-clockwise to increase idle
speed.
8.Stop engine, remove blanking hoses. Reconnect
hose to plenum.
9.Fit new tamper proof plug.

SFI
1
ADJUSTMENT ENGINE TUNING
Service repair no - 19.22.13
The position of the Idle Air Control (IAC) valve can be
checked using TestBook and adjusted if necessary
through the by-pass screw in the plenum chamber.
The bypass screw is covered by a tamper proof plug
which can be extracted using a self tapping screw.
All vehicles:
1.Ensure air conditioning and all electical loads are
off. Vehicle must be in neutral or park with air
suspension in kneel and disabled.
2.Carry out tuning or base idle setting procedure
as applicable using TestBook.