Land Rover Defender 90 Workshop 2nd Edition Nas Rover Manual

4.0 V8
3
REPAIR ROCKER SHAFT RENEW
Service repair no - 12.29.29
1.Remove RH or LH rocker covers.
See ENGINE
4.0 V8, Repair, rocker cover - right hand
or.
See ENGINE 4.0 V8, Repair, rocker cover -
left hand
2.Loosen four rocker shaft fixings.
3.Remove rocker shaft assembly.
NOTE: Each rocker shaft is notched at
ONE end. Notch must be uppermost and
towards front of engine on right hand side,
towards rear on left hand side.
4.Clean rocker pedestal locations on cylinder
head.
5.Fit rocker shaft assembly,...

12ENGINE
4
REPAIR ROCKER COVER GASKET - LEFT HAND
Service repair no - 12.29.40
Remove
1.Disconnect battery negative lead.
2.Remove plenum chamber.
See FUEL SYSTEM,
Repair, plenum chamber
3.Remove screw securing dipstick tube to rocker
cover.
4.Release 4 spark plug leads from guide clips and
disconnect leads from spark plugs.
5.Remove 4 bolts securing rocker cover to cylinder
head.
6.Remove rocker cover.
7.Remove and discard rocker cover gasket.
Refit
8.Clean mating faces of rocker cover and cylinder
head...

4.0 V8
5
REPAIR ROCKER COVER GASKET - RIGHT HAND
Service repair no - 12.29.41
Remove
1.Disconnect battery negative lead.
2.Disconnect breather hose from plenum chamber
and remove hose from rocker cover.
3.Position container to collect coolant spillage.
4.Remove bolt securing coolant pipe brackets
together and nut securing bracket to manifold.
5.Loosen clip and disconnect coolant return hose
from manifold.
6.Depressurise fuel system.
See FUEL SYSTEM,
Adjustment, fuel system depressurise
7.Position cloth...

12ENGINE
6
REPAIR Refit
15.Clean mating faces of rocker cover and cylinder
head using Bostick 6001 or equivalent. Allow to
dry.
16.Apply a thin coating of impact adhesive (Bostick
1775 or equivalent) to mating faces of rocker
cover and gasket. Use a brush to ensure an
even film. Allow adhesive to become touch dry.
NOTE: Gasket only fits one way round. It
must be fitted accurately, first time.
Subsequent movement will destroy
bonding.
17.Place one end of gasket into cover recess with
edge firmly against...

4.0 V8
7
REPAIR
12.Loosen clip screws securing heater return and
feed hoses to pipes and disconnect.
13.Position cloth to collect fuel spillage.
14.Loosen fuel feed hose to rail union, allow fuel to
spill and disconnect union.
15.Loosen clip screw securing fuel return hose to
fuel rail and disconnect hose.
CAUTION: Plug the connections.
16.Remove cloth.
17.Remove plenum.
See FUEL SYSTEM, Repair,
plenum chamber
18.Remove bolt securing 2 breather pipe P clip to
rear of RH cylinder head.
19.Loosen clip...

12ENGINE
8
REPAIR
23.Remove 3 bolts securing PAS pulley and
remove pulley.
24.Release knock sensor harness clip from PAS
return hose.
25.Remove 3 bolts securing PAS pump and
position aside.
26.Collect engine lifting bracket.
27.Position engine lifting bracket and secure with 3
(3/8 UNC x 1 MAX) bolts.
28.Raise vehicle on ramp.
29.Remove 6 nuts securing exhaust front pipe to
manifolds.
30.Remove front bolt securing RH catalyst heat
shield to chassis.
31.Remove bolt securing starter motor heat shield
to RH...

4.0 V8
9
REPAIR
35.Remove starter motor solenoid terminal nut.
36.Release 2 battery leads from terminal.
37.Disconnect solenoid Lucar.
38.Disconnect multiplug from RH Knock sensor.
39.Remove 2 cable ties securing engine harness to
RH engine mounting bracket.
40.Disconnect multiplug from LH knock sensor.
41.Remove cable tie securing engine harness to LH
engine mounting bracket.
42.Remove screw securing crankshaft position
sensor heat shield and remove heat shield.
43.Disconnect multiplug from crankshaft...

12ENGINE
10
REPAIR
47.Mark relationship between converter and drive
plate.
48.Rotate crankshaft to access drive plate to
converter retaining bolts.
49.Remove 4 bolts securing drive plate to
converter.
50.Fit suitable piece of wood through bell housing
access hole to retain converter.
51.Remove 2 bell housing lower retaining bolts.
52.Remove nut securing RH engine mounting to
chassis bracket.
53.Remove nut securing LH engine mounting to
chassis bracket.
54.Lower vehicle.
55.Loosen clip screw and...

4.0 V8
11
REPAIR
59.Remove 2 alternator terminal nuts and
disconnect Lucar.
60.Remove screw securing heater pipe to bracket.
61.Loosen clip screw and remove heater hose/pipe
assembly from inlet manifold.
62.Remove 2 screws securing engine harness to
RH side of inlet manifold.
63.Disconnect 4 RH injector multiplugs.
64.Disconnect RH rocker cover breather pipe from
ram housing.
65.Release RH bank HT leads from clips and
disconnect from spark plugs.
66.Remove 2 screws securing engine harness to
LH side of...

12ENGINE
12
REPAIR
73.Fit engine lifting toolLRT-12-514to hoist.
74.Lower hoist and connect lifting chains to engine
brackets.
75.Raise hoist until lifting chains become taught and
use a jact to support gearbox.
76.Remove 6 bell housing to engine bolts.
77.With assistance, raise engine on hoist from
engine compartment.
CAUTION: During the engine removal
procedure ensure that the engine does not
damage any surrounding components.
78.Move engine clear of vehicle and lower onto
work bench.
79.Disconnect...