1995 LAND ROVER DISCOVERY coolant temperature

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.

12ENGINE
8
REPAIR 21.Release clip and disconnect inlet hose from
power steering pump.
22.Disconnect outlet pipe union at power steering
pump, discard 'O' ring.
CAUTION: Plug the connections
23.Release throttle cable from abutment bracket.
24.Release throttle cable from cam. Also remove
coolant bypass hose from throttle housing.
25.Disconnect stepper motor and throttle
potentiometer multiplugs.
26.Release clip and disconnect hose, air cleaner to
throttle housing.
27.Release clip and disconnect brake servo hose
from manifold.
28.Disconnect fuel temperature sensor multiplug.

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
15
REPAIR 4.Release clip and disconnect hose from heater
rail.
5.Disconnect 2 coolant temperature sensor
multiplugs.
6.Release clips and disconnect the bypass hose
and top hose.
7.Release harness from cable tie.
8.Disconnect oxygen sensor multiplug.
9.Release harness lead from cable tie.
10.Release throttle cable from abutment bracket.
11.Release throttle cable from cam. Also remove
coolant bypass hose from throttle housing.
12.Disconnect stepper motor and throttle
potentiometer multiplugs.
13.Release clip and disconnect hose, air cleaner to
throttle housing.

12ENGINE
16
REPAIR 14.Release clip and disconnect brake servo hose
from manifold.
15.Disconnect fuel temperature sensor multiplug.
16.Remove 3 bolts securing engine harness to
manifold.
17.Disconnect fuel injection harness multiplug.
18.Disconnect inlet manifold air temperature sensor
multiplug.
19.Release clip and disconnect fuel hose from
pressure regulator.
CAUTION: Plug the connections
20.Release clips and disconnect 3 hoses from
manifold.
21.Remove bolt securing dipstick tube to coolant
rail.

12ENGINE
18
REPAIR Refit
1.Fit location dowels to cylinder head.
2.Fit cylinder head gasket to cylinder block.
3.Using assistance fit cylinder head to cylinder
block.
4.Lubricate cylinder head bolts.
5.Fit and tighten cylinder head bolts to the correct
torque and in the correct sequence.
NOTE: For torque values.See
Specifications, torque, Torque values
6.Fit timing belt.
7.Fit camshaft covers.
8.Fit spark plug leads to spark plugs and secure to
clips.
9.Fit spark plug cover and secure with screws.
10.Fit new gasket and secure downpipe to exhaust
manifold with nuts.
11.Fit bolt securing dipstick tube to coolant rail.
12.Connect 3 vacuum hoses to inlet manifold.
13.Connect fuel to pressure regulator, secure with
clip.
14.Connect fuel injection harness, inlet manifold air
temperature sensor and fuel temperature sensor
multiplugs.
15.Secure engine harness to manifold with bolts.
16.Connect brake servo hose to manifold, secure
with clip.
17.Connect air cleaner hose to throttle housing,
secure with clip.
18.Connect stepper motor and throttle
potentiometer multiplugs.
19.Fit and adjust throttle cable.
20.Connect oxygen sensor multiplug, secure with
cable tie.
21.Connect the bypass and top hose, secure with
clips.
22.Connect coolant temperature sensor multiplugs,
secure with cable tie.
23.Connect hose to heater rail and secure with clip.
24.Connect radiator bottom hose and secure with
clip.
25.Tighten fuel pipe to fuel rail union.
26.Reconnect battery negative lead.

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...........................................................................................