belt LAND ROVER DEFENDER 1999 User Guide

12ENGINE
30
REPAIR Refit
10.Clean oil cooler and mating faces.
11.Fit oil pressure switch and tighten to9Nm(7
lbf.ft).
12.Position oil cooler using a new gasket and
tighten bolts to25 Nm (18 lbf.ft).
13.Position oil filter adaptor, fit new gasket and
tighten bolts to25 Nm (18 lbf.ft).
14.Position oil filter element hand tight then a
further half turn.
15.Position coolant hose to oil cooler and secure
clip.
16.Position coolant pipe and tighten clutch housing
bolt to50 Nm (37 lbf.ft).
17.Connect oil pressure switch multiplug.
18.Fit centrifuge assembly.See this Section.
19.Refill cooling system.See COOLING SYSTEM,
Adjustment.
20.Top up engine oil.CENTRIFUGE ASSEMBLY
Service repair no - 12.60.90
Remove
1.Remove fixings and remove underbelly panel.
See CHASSIS AND BODY, Repair.
2.Remove 2 bolts securing centrifuge drain pipe to
engine sump and discard gasket.
3.Remove turbocharger.See FUEL SYSTEM,
Repair.
Models with air conditioning only
4.Remove auxiliary drive belt.See
ELECTRICAL, Repair.
5.Remove 4 bolts securing compressor and move
to one side.
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ENGINE
31
REPAIR All Models
6.Remove 3 bolts securing centrifuge to engine oil
cooler.
7.Remove centrifuge and discard’O’ring.
8.Remove 2 bolts, remove drain pipe from
centrifuge and discard gasket.Refit
9.Clean mating faces of centrifuge, oil cooler and
sump.
10.Position drain pipe to centrifuge using new
gasket and tighten bolts to10 Nm (7 lbf.ft).
11.Position new’O’ring to oil cooler.
12.Position centrifuge and tighten bolts to25 Nm
(18 lbf.ft).
13.Align drain pipe to sump, fit new gasket and
tighten bolts to10 Nm (7 lbf.ft)
Models with air conditioning only
14.Position compressor and tighten bolts to25 Nm
(18 lbf.ft).
15.Fit auxiliary drive belt.See ELECTRICAL,
Repair.
All Models
16.Fit turbocharger.See FUEL SYSTEM, Repair.
17.Fit underbelly panel.See CHASSIS AND
BODY, Repair.
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COOLING SYSTEM
5
DESCRIPTION AND OPERATION A - EU 3 Models
B- Pre EU3 Models
GENERAL
The cooling system used on the Diesel engine is a pressure relief by-pass type system which allows coolant to
circulate around the engine block and heater circuit when the thermostat is closed. With coolant not passing
through the by-pass or the radiator promotes faster heater warm-up which in turn improves passenger comfort.
A coolant pump is mounted on a casting behind the PAS pump and is driven from the PAS pump at crankshaft
speed by the auxiliary drive belt. The pump mounting casting connects with passages in the cylinder block and
pumps coolant from the radiator through the cylinder block.
A viscous fan is attached to an idler pulley at the front of the engine. The fan is attached to a threaded spigot on
the pulley with a right hand threaded nut. The fan draws air through the radiator to assist in cooling when the
vehicle is stationary. The fan rotational speed is controlled relative to the running temperature of the engine by a
thermostatic valve regulated by a bi-metallic coil.
The cooling system uses a 50/50 mix of anti-freeze and water.
Thermostat Housing
A plastic thermostat housing is located behind the radiator. The housing has three connections which locate the
radiator bottom hose, top hose and coolant pump feed pipe. The housing contains a wax element thermostat and
a spring loaded by-pass flow valve.
Thermostat - Main valve
The thermostat is used to maintain the coolant at the optimum temperature for efficient combustion and to aid
engine warm-up. The thermostat is closed at temperatures below approximately 82°C (179°F). When the coolant
temperature reaches approximately 82°C the thermostat starts to open and is fully open at approximately 96°C
(204°F). In this condition the full flow of coolant is directed through the radiator.
The thermostat is exposed to 90% hot coolant from the engine on one side and 10% cold coolant returning from
the radiator bottom hose on the other side.
Hot coolant from the engine passes from the by-pass pipe through four sensing holes in the flow valve into a tube
surrounding 90% of the thermostat sensitive area. Cold coolant returning from the radiator, cooled by the ambient
air, conducts through 10% of the thermostat sensitive area.
In cold ambient temperatures, the engine temperature is raised approximately 10°C (50°F) to compensate for the
heat loss of 10% exposure to the cold coolant returning from the radiator bottom hose.
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26COOLING SYSTEM
8
DESCRIPTION AND OPERATION Coolant Pump
1.Drive lugs (hidden)
2.Housing
3.’O’rings4.Cover
5.Feed hose connection
6.Impeller
The coolant pump is attached on the left hand side of the engine, behind the PAS pump. A cast housing, bolted to
the cylinder block provides a common attachment point for both pumps. The housing has galleries which connect
the coolant pump to the cylinder block and the oil cooler housing. The coolant pump comprises a shaft, a housing
and a cover.
The shaft, which passes through the alloy housing, is supported at each end by bearings. Seals at each end of the
shaft protect the bearings from the coolant. The forward end of the shaft has two lugs which engage with the PAS
pump shaft. The opposite end of the shaft is fitted with an impeller which draws coolant from the feed pipe and
circulates it through galleries in the cylinder block. The shaft is driven by the auxiliary drive belt at the same
rotational speed as the crankshaft by a pulley attached to the PAS pump.
The pump is sealed in the cast housing with two’O’rings. An outer cover is positioned over the pump and secured
with six bolts and sealed to the pump with an’O’ring. The cover provides the attachment for the feed pipe
connecting hose.
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COOLING SYSTEM
9
DESCRIPTION AND OPERATION Viscous Fan
1.Idler pulley drive attachment
2.Fan blades3.Bi-metallic coil
4.Body
The viscous fan provides a means of controlling the speed of the fan relative to the operating temperature of the
engine. The fan rotation draws air through the radiator, reducing engine coolant temperatures when the vehicle is
stationary or moving slowly.
The viscous fan is attached to an idler pulley at the front of the engine which is driven at crankshaft speed by the
auxiliary drive belt. The fan is secured to the pulley by a right hand threaded nut. The nut is positively attached to
the fan spindle which is supported on bearings in the fan body. The viscous drive comprises a circular drive plate
attached to the spindle and driven from the idler pulley. The drive plate and body have interlocking annular
grooves with a small clearance which provides the drive when silicone fluid enters the fluid chamber. A bi-metallic
coil is fitted externally on the forward face of the body. The coil is connected to and operates a valve in the body.
The valve operates on a valve plate with ports that connect the reservoir to the fluid chamber. The valve plate also
has return ports which, when the valve is closed, scoop fluid from the fluid chamber and push it into the reservoir
under centrifugal force.
Silicone fluid is retained in a reservoir at the front of the body. When the engine is off and the fan is stationary, the
silicone fluid level stabilises between the reservoir and the fluid chamber. This will result in the fan operating when
the engine is started, but the drive will be removed quickly after the fan starts rotating and the fan will’freewheel’.
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MANIFOLD AND EXHAUST SYSTEM
5
REPAIR Refit
16.Clean inlet manifold and mating face.
17.Fit new gasket.
18.Fit inlet manifold, and working from the centre
outwards, tighten nuts and bolts to25 Nm (18
lbf.ft).
19.Position harness to sensors and connect
multiplugs.
20.Tighten harness clip bolts to camshaft carrier to
10 Nm (7 lbf.ft).
21.Clean dip stick tube and fit new’O’ring.
22.Fit dip stick tube and tighten bolt to10 Nm (7
lbf.ft).
23.Connect glow plug leads.
24.Fit alternator support bracket and tighten bolts to
45 Nm (33 lbf.ft).
25.Position fuel cooler. Apply Loctite 242 to bolts
and tighten to18 Nm (13 lbf.ft).
26.Fit new gasket, position EGR valve and tighten
bolts to9 Nm (7 lbf.ft).
27.Connect multiplug to MAP sensor.
28.Fit cooling fan cowl.
29.Fit engine acoustic cover.
30.Reconnect battery negative lead.
31.Fit battery cover.GASKET - EXHAUST MANIFOLD
Service repair no - 30.15.12
Remove
1.Remove turbocharger.See FUEL SYSTEM,
Repair.
2. Models with A/C:Remove auxiliary drive belt.
See ELECTRICAL, Repair.
3.Remove 4 bolts securing compressor and move
to one side.
All Models
NOTE: EU3 Model illustrated.
4.Remove and discard 2 Allen screws securing
EGR pipe to exhaust manifold.
5.Remove 10 nuts securing exhaust manifold to
cylinder head.
6.Remove exhaust manifold and gasket.
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30MANIFOLD AND EXHAUST SYSTEM
6
REPAIR Refit
7.Clean exhaust manifold and mating face.
8.Fit exhaust manifold with new gasket and tighten
nuts to25 Nm (18 lbf.ft).
9. Models with A/C:Position compressor and
tighten bolts to25 Nm (18 lbf.ft).
10. All Models:Position EGR valve pipe, fit new
allen screws and tighten to10 Nm (7 lbf.ft).
11.Fit turbocharger.See FUEL SYSTEM, Repair.
12. Models with A/C:Fit auxiliary drive belt.See
ELECTRICAL, Repair.
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76 - CHASSIS AND BODY
CONTENTS
Page
DESCRIPTION AND OPERATION
FRONT SEAT RECLINE - FROM 02MY 1..............................................................
SOFT TOP - FROM 02MY 1...................................................................................
TAIL DOOR - FROM 02MY 2..................................................................................
ADJUSTMENT
TAIL DOOR STRIKER 1.........................................................................................
REPAIR
PANEL - UNDERBELLY - FRONT AND CENTRE 1...............................................
CUBBY BOX 1........................................................................................................
TRIM CASING - TAIL DOOR - UP TO 02MY 2.......................................................
LATCH - TAIL DOOR - UP TO 02MY 3..................................................................
CARPET - LUGGAGE COMPARTMENT 3.............................................................
WING - FRONT 4....................................................................................................
STEP - FOLDING - REAR DOOR 7........................................................................
LINER - FRONT WHEEL ARCH 8..........................................................................
FRONT BUMPER 9.................................................................................................
DOOR - REAR 9.....................................................................................................
DOOR - TAIL - REMOVE 10...................................................................................
GLASS/SEALING RUBBER - TAIL DOOR - UP TO 02MY 11................................
SEAT BELT - FRONT 12........................................................................................
SEAT BELT - CENTRE - REAR 13.........................................................................
SEAT BELT - REAR - SIDE 13...............................................................................
SEAT - REAR 14.....................................................................................................
COVER - CUSHION - REAR SEAT 15...................................................................
COVER - SQUAB - REAR SEAT 16.......................................................................
REGULATOR - REAR DOOR GLASS 16...............................................................
TRIM CASING - REAR DOOR 17...........................................................................
AUXILLIARY SWITCH PANEL 18...........................................................................
LOWER FASCIA PANEL - UP TO 02MY 19...........................................................
PANEL - MOUNTING - FRONT DOOR - FROM 02MY 23.....................................
PANEL - MOUNTING - REAR DOOR - FROM 02MY 25........................................
FACIA CONSOLE - FROM 02MY 27......................................................................
GLASS - REAR DOOR - FROM 02MY 29..............................................................
GLASS/SEALING RUBBER - TAIL DOOR - FROM 02MY 30................................
TRIM CASING - FRONT DOOR - FROM 02MY 31................................................
TRIM CASING - TAIL DOOR - FROM 02MY 33.....................................................
PLASTIC SHEET - FRONT DOOR - FROM 02MY 34............................................
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CHASSIS AND BODY
3
REPAIR LATCH - TAIL DOOR - UP TO 02MY
Service repair no - 76.37.16
Remove
1.Remove tail door trim casing.See this Section.
2.Collect latch cover.
3.Remove 2 screws securing latch to door and
collect captive nut bracket.
4.Remove 2 nuts securing latch to door and collect
captive bolt bracket.
5.Remove latch assembly and collect foam
gasket.
Refit
6.Fit foam gasket and latch assembly to tail door.
7.Fit captive nut and bolt brackets to tail door.
8.Secure latch to tail door with nuts and screws.
9.Fit cover to latch.
10.Fit tail door trim casing.See this Section.CARPET - LUGGAGE COMPARTMENT
Service repair no - 76.49.04
Remove
1.Remove 7 screws and remove carpet retainer.
2.Remove bolt covers and remove rear seat belt
bolts.
3.Release rear seat catches and fold seats
forward.
4.Remove luggage compartment carpet.
Refit
5.Position carpet.
6.Fold rear seats to position.
7.Align rear seat belts and tighten tighten bolts.
8.Fit bolt covers.
9.Position carpet retainer and tighten screws.
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76CHASSIS AND BODY
12
REPAIR SEAT BELT - FRONT
Service repair no - 76.73.13
Remove
1.Remove cap from seat belt guide bolt.
2.Remove bolt securing seat belt guide to’B’post.
3.Release belt from’B’post mounting.
4.Remove 3 bolts securing belt bracket to seat
base.
5.Remove 2 studs securing seat belt retaining clip.
6.Remove retaining clip.
7.Remove bolt securing inertia reel to body.
8.Remove automatic belt assembly.
9.Remove 2 bolts securing stalk to body.
10.Remove stalk.
Refit
11.Position stalk and tighten bolts.
12.Position automatic belt assembly to body and
tighten bolt to38 Nm
13.Unreel portion of belt.
14.Position bracket to seat base, tighten bolts.
15.Position belt to’B’post mounting and tighten bolt
to32 Nm (24 lbf.ft).
16.Fit cap to bolt head.
17.Position belt retaining clip to seat base and
secure with studs.
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