Defender (1993+). Manual — part 15

MAINTENANCE

ALTERNATOR DRIVE BELT

RESET EMISSION MAINTENANCE REMINDER

Before adjusting the alternator drive belt, ensure that

the steering pump drive belt is correctly tensioned.

A

positive drive tensioner is fitted to provide greater

accuracy when setting the alternator belt. The
tensioner eliminates the need to lever the alternator

when adjusting the belt tension.

The emission maintenance reminder is designed to
activate at 52,500 and

105,000

miles respectively

and will illuminate a red 'Service Engine' warning
light in the instrument panel.

The control unit

IS

located behind the instrument

panel,

1.

Loosen the alternator pivot bolt and the bolt

The control unit colour is brown, mounted on

a

securing the alternator to the tensioner.

brown

plug,

'EMISSION

MAINTENANCE

2. Loosen the

two

tensioner nuts and the bolt

REMINDER' is embossed in white on the side of

the

securing the tensloner to the water pump

unit.

A

tamperproof label is attached to the top

of

the

bracket.

unit.

3.

Rotate

the

tensionerlead screw

either

anti-clockwise to slacken

or

clockwise to

The emission maintenance reminder must be reset

tighten the drive belt until the correct tension

after the required maintenance has been carried out

is obtained.

and a new tamperproof label fitted by a Land Rover

of

North America dealer. This Emission maintenance

reminder is part of the Emission Control System,
refer to section 17.

The unit

can

be reset as follows:

1.

Remove the fixings and lower the lower dash
panel.

2.

Identify the control unit and remove

it

from the

plug.

3.

Remove the tamperproof label to reveal the
access hole for resetting.

NOTE: Where possible the

belt tension

should

be

checked using

a recognised tensioning gauge.

The

correct

tension using

a Clavis

gauge

is 152

to 158

Hz.

Tighten the alternator pivot bolt. the two bolts
securing the tensioner and the two tensioner
nuts Recheck the belt tension.

5.

If a new drive belt has been fitted. run the

engine at fast idle for 3 to 5 minutes, stop
engine and recheck belt tension.

4

26

REVISED: OCT 1993

MAINTENANCE

4.

Using a small

thin

metallic probe, place the

probe into the access hole and momentarily
electrically short between the reset pins within

the unit.

5.

Refit the control unit to the plug, switch on the

ignition, the

’SERVICE ENGINE’

warning light

in the instrument panel

will

initially light up as

part of the unit’s inbuilt check feature, if the
unit has been

reset

correctly the warning light

will go

out after a few seconds. Should the

warning light remain illuminated, repeat the
resetting procedure.

6. Fit a new tamperproof label.

7.

Endorse the Passport to service.

REISSUED:

FEB

1993

27

DESCRIPTION

The

V8

engine has cast aluminium cylinder heads and cylinder block. The

two

banks

of

steel cylinder liners

which are pressed down to stops in the block, are set at 90° to one another. The three ringed aluminium
pistons transmit the power through the connecting rods

to a

cast

iron

five bearing crankshaft, which drives the

centrally located camshaft via an inverted tooth chain.

The electronic ignition distributor and lubrication oil pump are driven by a skew gear off the front

of the

camshaft. The overhead inlet and exhaust valves are operated by rocker shafts, pushrods and self adjusting
hydraulic tappets.

Multipoint fuel injection ensures that engine performance, economy and exhaust emissions are automatically

correct

for the demands

of highway and off road operation.

ENGINE

ENGINE

RR3627M

1.

Cylinder block

19. Crankshaft sprocket key

2. Pistons and gudgeon pins (8)

20. Crankshaft

4. Core plugs

22. Crankshaft rear oil seal

5. Camshaft

23. Spacer

6. Dipstick

24. Adaptor plate

7. Camshaft key

25. Rear main bearing cap, shell and side seals

8. Timing chain

26. Connecting rod caps

9. Camshaft sprocket

27. Main bearing caps and shell bearings

3. Connecting rods (8)

21.

Centre

main

bearing

shells

(2)

10. Distance piece

28. Oil pump cover

11. Distributor/oil pump drive gear

29. Oil pressure refief valve

12. Distributor

30. Oil cooler/filter adaptor

13. Oil pump gears

31. Oil filter

14.

.

. Front Cover

32.

Oil pump suction pipe/strainer

15. Front cover oil seal

33. Sump

16. Water pump
17. Crankshaft damper/pulley
18. Crankshaft sprocket