sensor LAND ROVER DISCOVERY 1995 Owner's Manual

12ENGINE
4
REPAIR 39.Release battery positive lead terminal cover.
40.Remove terminal nut
41.Release terminal from battery.
42.Release fusebox main feed lead.
43.Position battery cable over engine.
44.Pivot jockey pulley downwards to release drive
belt tension.
45.Release belt from pulleys.
46.Remove drive belt.
47.Disconnect compressor multiplug
48.Remove 4 bolts securing compressor.
49.Remove heatshield.
50.Release compressor from bracket and tie aside.
51.Slacken clip securing PAS hose to pump.
52.Disconnect hose.
53.Plug hose and pump.
54.Disconnect PAS hose connection at pump and
steering box.
55.Release unions and remove hose.
56.Remove and discard 'O' rings.
57.Plug pump and steering box.
58.Remove LH and RH engine mounting nuts.
59.Position lifting chains and attach hooks to engine
lifting eyes.
60.Raise engine sufficiently to release engine
mountings.
61.Release engine mountings and remove.
62.Lower engine until it just rests on engine
mounting brackets.
63.Disconnect chains.
64.Raise ramp.
65.Remove catalytic converter/front pipe assembly.
See EMISSION CONTROL, Repair, Catalytic
Converter/Front Pipe - 4.0 V8
66.Remove 9 bolts securing bell housing bottom
cover. Note position of 2 dowel bolts.
67.Remove cover.
68.Remove locknut securing transfer box tie bar.
69.Remove 2 bolts securing tie bar to tranmission.
70.Remove tie bar.
71.Remove 2 and slacken 1 bolt, securing bell
housing access plate and position aside.
72.Mark drive plate to torque converter relationship.
73.With assistance, rotate crankshaft for access to
first bolt (torque converter to drive plate).
74.Remove first bolt.
75.Repeat steps for the remaining 3 bolts.
76.Remove 2 bolts securing crankshaft sensor
shield to engine backplate.
See FUEL SYSTEM
SFI, Repair, Crankshaft Position Sensor
(CKP Sensor)

4.0 V8
5
REPAIR 77.Release sensor/shield and remove.
78.Disconnect sensor multiplug.
79.Remove sensor.
80.Remove starter motor heatshield.
See
ELECTRICAL, Repair, Starter Motor
Heatshield - 4.0 V8
81.Disconnect solenoid Lucar.
82.Disconnect RH and LH knock sensor multiplugs.
See FUEL SYSTEM SFI, Repair, Knock
Sensor
83.Release harness from engine.
84.Remove nut securing handbrake cable
heatshield.
85.Release speed sensor lead from clip on
heatshield.
86.Remove heatshield.
87.Disconnect top oil cooler pipe union from
transmission.
88.Release union.
89.Remove 'O' ring and discard.
90.Plug pipe and transmission.
91.Remove bolt securing oil cooler pipe bracket tosump. Collect spacer.
92.Remove 3 bolts from top of bell housing.
93.Collect 2 harness brackets.
94.Remove 2 bolts, LH and RH side of bell housing.
95.Remove centre LH bell housing bolt using long
extension.
96.Remove 2 lower bolts from bell housing.
97.Fit suitable wooden block in access plate hole to
retain torque converter.
98.Secure block with cover plate and tighten one
cover plate bolt.
99.Support gearbox on a jack.
100.Lower ramp.
101.Position lifting chains and attach hooks to engine
lifting eyes.
102.Raise engine.
103.Raise jack.
104.Break engine to gearbox joint.
105.Raise engine.

12ENGINE
6
REPAIR
106.Remove top starter bolt securing engine earth
cable.
107.Remove nut securing kick-down cable clip to LH
cylinder head.
108.With assistance, raise engine, move aside all
pipes and wires. Move engine clear of vehicle.
109.Lower engine onto bench.
Refit
110.Clean engine and gearbox mating faces.
111.Clean dowel and dowel holes.
112.With assistance raise engine off bench. Lower
and guide engine into engine compartment
ensuring no wires or pipes become trapped.
113.Position clip securing kick-down cable to LH
cylinder head.
114.Fit and tighten nut.
115.Position engine earth cable and secure to starter
with top bolt. Tighten to
45 Nm.
116.Lower engine.
117.With assistance, engage engine with gearbox.
118.Fit 3 bottom bell housing bolts. Tighten to
46
Nm.
119.Lower jack supporting gearbox.
120.Lower engine onto mounting brackets.
121.Fit centre RH bell housing bolt.
122.Fit centre LH bell housing bolt.
123.Fit harness brackets to 2 top bell housing bolts.
124.Fit bolts. Tighten to
46 Nm.
125.Remove plugs from tranmission and oil cooler
pipe.
126.Clean pipe, lubricate NEW 'O' ring and fit to
pipe.
127.Connect pipe to transmission and secure with
union. Tighten to
30 Nm.
128.Align pipe bracket to sump, position spacer and
fit bolt. Tighten to
18 Nm.
129.Fit heatshield and secure with nut.
130.Secure transducer lead to clip on heatshield.131.Slacken bell housing access plate bolt.
132.Move plate aside.
133.Remove block.
134.Align drive plate and torque converter.
135.Fit 2 torque converter bolts.
136.Rotate engine and fit second 2 bolts. Tighten to
45 Nm.
137.Rotate engine and tighten first 2 bolts to Tighten
to
45 Nm.
138.Clean cover plate and mating face.
139.Position cover plate and fit bolts. Tighten to
45
Nm.
140.Position access plate.
141.Fit 2 remaining bolts and tighten all bolts to
Tighten to
9 Nm.
142.Position engine harness around engine.
143.Connect knock sensor multiplug.
144.Connect starter solenoid Lucar.
145.Position starter motor heatshield and secure clip
to solenoid.
146.Align shield bracket to engine mounting bracket
and fit bolt. Tighten to
9 Nm.
147.Clean crankshaft sensor mating faces.
148.Position sensor and connect multiplug.
149.Position/align sensor and shield to backplate. Fit
bolts. Tighten to
6 Nm.
150.Fit tie bar, align to transmission and fit bolts.
Tighten to
25 Nm.
151.Fit tie bar securing nut. Tighten to45 Nm.
152.Fit catalytic converter/front pipe assembly.See
EMISSION CONTROL, Repair, Catalytic
Converter/Front Pipe - 4.0 V8
153.Raise engine.
154.Fit RH mounting rubber.
155.Move engine over.
156.Fit LH mounting rubber.
157.Lower engine.
158.Disconnect hoist.
159.Fit engine mounting nuts. Tighten to
55 Nm.
160.Remove plugs from steering pump and steering
box.
161.Clean PAS hose unions.
162.Lubricate 'O' rings and fit to hose unions.
163.Position hose.
164.Align unions to pump and steering box. Tighten
14mm thread to
15 Nm, 16mm thread to
Tighten to
20 Nm.
165.Remove plugs from feed hose and PAS pump.
166.Connect hose to pump and tighten clip.
167.Untie compressor and position to engine
bracket.
168.Position heatshield and fit bolts. Tighten to
25
Nm.
169.Connect compressor multiplug.
170.Position drive belt.

4.0 V8
7
REPAIR 171.Route drive belt around pulleys.
172.Pivot tensioner downwards.
173.Align belt to tensioner and release tensioner.
174.Connect battery positive lead and tighten.
175.Secure terminal cover.
176.Align gearbox breather pipe, clip to engine lifting
eye and fit bolt. Tighten to
9 Nm.
177.Align and secure engine harness brackets to
inlet manifold and fit nuts. Tighten to
9 Nm.
178.Connect injector multiplugs.
179.Connect air intake temperature sensor multiplug.
180.Connect fuel temperature sensor multiplug.
181.Connect coolant temperature multiplug.
182.Connect temperature gauge connector.
183.Connect oil pressure switch Lucar.
184.Connect camshaft sensor multiplug and secure
to bracket.
185.Fit ignition coil bracket.
See FUEL SYSTEM
SFI, Repair, Ignition Coils
186.Position heater hose/pipe assembly.
187.Connect hose to inlet manifold.
188.Align pipe to bracket and fit bolt. Tighten to
9
Nm.
189.Tighten hose clip.
190.Connect heater return hose and tighten clip.
191.Remove plugs from fuel feed and return hose
connections.
192.Clean feed unions.
193.Connect return hose and tighten clip.
194.Connect feed hose union and tighten.
195.Remove cloth.
196.Connect purge hose.
197.Connect leads to generator, tighten terminal nuts
and fit cover.
198.Connect sensing Lucar.
199.Connect servo vacuum hose.
200.Position expansion tank and secure with fixings.
201.Connect hose and tighten clip.
202.Lower ramp.
203.Fit mass air flow sensor.
See FUEL SYSTEM
SFI, Repair, Mass Air Flow Sensor (MAF
Sensor)
204.Fit plenum chamber.See FUEL SYSTEM SFI,
Repair, Plenum Chamber
205.Fit radiator.See COOLING SYSTEM, Repair,
Radiator
206.Fit bonnet.See CHASSIS AND BODY, Repair,
Bonnet [Hood]
207.Reconnect battery negative lead.
208.Bleed power steering system.
See STEERING,
Repair, Power Steering System - Bleed
209.Drain engine oil and refill.See LUBRICANTS,
FLUIDS AND CAPACITIES, Information,
Recommended Lubricants and Fluids - USA
Vehicles
210.Start engine. Check for fuel, coolant and oil
leaks.FRONT COVER GASKET
Service repair no - 12.65.04 - Front Cover Gasket
Remove
1.Disconnect battery negative lead.
2.Drain cooling system.
See COOLING SYSTEM
V8, Adjustment, Coolant
3.Remove radiatorSee COOLING SYSTEM,
Repair, Radiator
4.Remove water pump pulley.See COOLING
SYSTEM, Repair, Viscous Coupling, Fan
Blades, Pulley and Fan Cowl
5.Slacken bottom hose clip. Remove hose from
water pump.
6.Raise vehicle on ramp.
7.Disconnect oil cooler hoses from front cover and
position aside. Plug hoses and connections.
8.Disconnect Lucar from oil pressure switch.

12ENGINE
8
REPAIR
9.Disconnect multiplug from camshaft sensor.
See FUEL SYSTEM SFI, Repair, Camshaft
Position Sensor (CMP Sensor)
10.Remove 9 bolts securing front cover.
11.Remove 2 bolts securing sump to front cover.
12.Loosen 4 bolts securing sump adjacent to front
cover (2 each side).
13.Release front cover assembly.
14.Remove oil seal.
15.Remove and discard gasket.Refit
16.Clean sealant from threads of cover bolts.
17.Clean old sealant from front cover and block joint
face.
CAUTION: Use a plastic scraper.
18.Apply Hylosil jointing compound to gasket
position on cover and block.
19.Fit new gasket to block face.
20.Ensure oil seal register in cover is clean.
21.Lubricate outer face of NEW oil seal.
22.Using LRT-12-089, fit seal to cover.
23.Lubricate oil pump drive gear and position in
pump with groove away from engine.
24.Locate alignment tool LRT-12-090 on front cover
and oil pump drive gear.
25.Position front cover over crankshaft.
26.Press and rotate tool to engage drive gear until
drive gear keyway aligns with Woodruff key.
27.Fit cover to cylinder block.

4.0 V8
9
REPAIR 28.Remove alignment tool LRT-12-090.
29.Apply a small amount of Loctite 242 to threads
and refit front cover bolts. Tighten to
22 Nm.
30.Fit sump bolts. Tighten to23 Nm.
31.Connect camshaft sensor multiplug.
32.Connect Lucar to oil pressure switch terminal.
33.Remove plugs from oil cooler pipes and cover.
34.Fit new 'O' ring seals, reconnect oil cooler pipes.
Tighten to
15 Nm.
CAUTION: Over tightening of oil cooler
pipe unions can crack front cover.
35.Refit bottom hose to water pump. Tighten clip.
36.Refit water pump pulley.
See COOLING
SYSTEM, Repair, Viscous Coupling, Fan
Blades, Pulley and Fan Cowl
37.Refit radiator assembly.See COOLING
SYSTEM, Repair, Radiator
38.Refill cooling system.See COOLING SYSTEM
V8, Adjustment, Coolant
39.Check/top-up engine oil.
40.Lower ramp.
41.Reconnect battery negative lead.

Mpi
3
DESCRIPTION AND OPERATION Lubrication
Oil is drawn from the pressed steel sump through a
strainer (1) and into the oil pump (2); excess pressure
being relieved by a pressure relief valve (3) integral
with the pump. The low oil pressure sensor (4)
registers the oil pressure in the main oil gallery on the
outflow side of the filter. Pressurised oil passes
through the full flow oil filter (5) to internal drillings in
the crankshaft where it is directed to each main
bearing and to the big end bearings via Nos. 1, 3 and
5 main bearings (6). An internal drilling in the cylinder
block directs oil, via a restrictor (7) to the cylinder
head where it passes through further internal drillings
to the hydraulic tappets and camshaft journals (8).
Gudgeon pin and small-end bush lubrication is by
splash from the big-end bearings.Crankcase ventilation
With the exception of two hoses connected from the
inlet camshaft cover to the inlet manifold and throttle
housing all crankcase ventilation is via internal voids
in the cylinder head and block. The inlet camshaft
cover carries a wire gauze flame trap located over the
breather pipe connections.

12ENGINE
4
DESCRIPTION AND OPERATION CYLINDER BLOCK COMPONENTS
1. Cylinder block
2. Knock sensor
3. Crankshaft sensor
4. Bolt - crankshaft sensor
5. Locating dowel - cylinder head
6. Bolt - connecting rod
7. Piston
8. Piston ring - top compression
9. Piston ring - 2nd compression
10. Piston ring - oil control
11. Gearbox adapter plate
12. Bearing shell - big end - upper
13. Flywheel
14. Bolt - flywheel
15. Torx screw - gearbox adapter plate
16. Blanking plate
17. Bolt - blanking plate
18. Gasket
19. Bolt - crankshaft rear oil seal housing
20. Crankshaft rear oil seal and housing
21. Bolt - coolant pump cover
22. Coolant pump cover
23. Impeller
24. Sealing rings
25. 'O' ring
26. Bolts - coolant pump
27. 'O' ring
28. Coolant pump body
29. Thrust washer halves - upper
30. Bearing shell - main bearing - upper
31. Locating dowel - oil pump
32. Locating dowel - flywheel
33. Gudgeon pin34. Crankshaft
35. Bearing shell - big end - lower
36. Bearing cap - big end
37. Nut - big end bearing cap
38. Locating dowel - main bearing cap
39. Bearing caps - main bearings
40. Bolt - main bearing cap
41. Thrust washer halves - lower
42. Bearing shell - main bearing - lower
43. Woodruff keys
44. Dipstick
45. Bolt - dipstick tube
46. Dipstick tube
47. Bolts - sump
48. Gasket - sump
49. 'O' ring
50. Oil strainer
51. Bolts - oil strainer
52. Sump
53. Washer - drain plug
54. Drain plug
55. Oil filter element
56. Crankshaft front oil seal
57. Bolts - oil pump
58. Gasket - oil pump
59. Oil pump
60. Oil pressure switch
61. Crankshaft spigot bush
62. Crankshaft spigot bearing
63. Locating dowel - coolant pump
64. Connecting rod
65. Bolts belt tensioner mounting plate
66. Belt tensioner mounting plate
67. Bolt - gearbox adapter plate

12ENGINE
6
DESCRIPTION AND OPERATION CYLINDER HEAD COMPONENTS
1. Engine oil filler cap
2. Filler cap seal
3. Screw - spark plug cover
4. Spark plug cover
5. h.t. lead plate
6. Screw - h.t. lead plate
7. Inlet camshaft cover
8. Exhaust camshaft cover
9. Bolt - exhaust camshaft cover
10. Exhaust camshaft cover gasket/baffle plate
11. Bolt - exhaust camshaft carrier
12. Exhaust camshaft carrier
13. Exhaust camshaft
14. Cylinder head bolt
15. Blanking plate
16. Bolt - blanking plate
17. Locating dowel - camshaft carrier
18. Coolant outlet elbow
19. Gasket
20. Bolt - coolant outlet elbow
21. Stud - exhaust manifold
22. Cylinder head gasket
23. Guide - exhaust valve24. Insert - exhaust valve seat
25. Exhaust valves
26. Inlet valves
27. Insert - inlet valve seat
28. Guide - inlet valve
29. Cylinder head
30. Stud - inlet manifold
31. Valve stem oil seal
32. Valve spring
33. Valve spring cap
34. Collets
35. Tappet
36. Camshaft oil seals
37. Drive pins - camshaft timing gears
38. Inlet camshaft
39. Inlet camshaft carrier
40. Bolt - inlet camshaft carrier
41. Inlet camshaft cover gasket/baffle plate
42. Bolt - inlet camshaft cover
43. Spark plug
44. Coolant temperature sensor
NOTE: Items 15,16 & 36 on current engines
replaced by an oil plug.
See Repair, Inlet -
Exhaust Camshaft Rear Oil Plug

Mpi
7
REPAIR
NOTE: On current models the generator
cover is omitted.
9.Remove 3 nuts securing generator rear cover.
10.Remove rear cover.
11.Remove 3 nuts securing harness to generator.
12.Remove harness.
13.Disconnect oxygen sensor multiplug.
14.Release multiplug from bracket.
15.Release harness from cable tie.
16.Disconnect 2 coolant temperature sensor
multiplugs.
17.Release clips and disconnect the bypass and
top hose.
18.Release harness lead from cable tie.
19.Release clip and disconnect breather hose from
inlet manifold.
20.Feed harness between inlet manifold and cam
cover.