engine JAGUAR X308 1998 2.G Workshop Manual

Accessory Drive - Accessory Drive

Description an
d Operation

Parts List
Cran
kshaft Pulley
The combined crankshaft
pulley and torsio
nal vibration damper drives a single, seve n ribbed vee belt. The belt drives all of
the engine-mounted accessories; the generator, the power assi sted steering pump, the air-conditioning compressor and the
coolant water pump.
I
dler Pulley
An i
dler pulley, on the right-hand
accessory mounting, increases the wrap-angle around the generator pulley.
Coolant Pump Drive
The coolan
t pump pulley is the
uppermost of the accessory drive pulleys. Th e coolant pump is fitted between the two
cylinder banks on the front face of the engine.
Air Conditioning Compressor Drive

Thi

s is positioned at the lowest poin
t of the front-end accessory-d rive on the left hand side accessory mounting.
It
em
Par
t Number
De
scription
1—Coo

lant Pump Drive
2—Ai

r-Conditioning Compressor Drive
3—Power Steer

ing Pump Drive
4—Au

tomatic Belt Tensioner
5—Crankshaft Pul

ley
6—Idle

r Pulley
7—Generator Dri

ve

The
automatic belt tensioner consists of an idler pulley which is
free to rotate on a bearing, located at the end of a spring-
loaded pivot arm.
The pivot arm can be turned counter-clockwise (viewed from th e front of the engine) for belt removal and installation.
A belt-wear indicator is incorporated on th e rear horizontal face of the pivot arm.
It
em
De
scription
1Bel

t Wear Indicator
2Re

new Belt Indicator
3N

ew Belt Maximum Length
4N

ew Belt Minimum Length
Au
tomatic Belt Tensioner

P a
rts List
All engine accessories are rigidly-mounted onto the cylinder block by means of accessory moun ting brackets on the left and
right-hand sides of the engine.
The left-hand bracket supports the air-cond itioning compressor and steering pump.
The right-hand bracket su pports the generator.
Dowels between the accessory mounting br ackets and the engine ensure that the accessory pulleys are accurately aligned
with the accessory drive belt.
A ccess
ory Drive on Supercharged Engines
The front
en
d accessory drive description and information for the
supercharged engine is identical to that given above. The
only difference is that the drive belt for the supercharger passes im mediately in front of the accessory drive belt. Therefore,
before any work can be done on the acce ssory drive belt and associated components, the supercharg er drive belt must first
be removed.


It e
m
Par
t
Number
De
scr
iption
1—R
i
ght Hand Mounting Bracket
2—Left H
and Mounting Bracket
Access
ory Mounting Brackets

Accessory Drive - Acce
ssory
Drive Belt4.0L NA V8 - AJ27/3.2L NA V8 -
AJ26
Re
moval and Installation
Remov

al
Installation

1.
O
pen the engine compartment and fit paintwork protection
sheets.
2. Check the belt wear indicator ma rks to confirm that the drive
belt is / is not within limits.

3. CAUTI
ON: When releasing the
belt tension, never apply
any torque in a clockwise direction to the pulley ce ntre bolt (left
hand thread) as it could subsequently loosen.
Remove the drive belt fro m the accessory drive.
1. Use a spanner e.g. Churchill JD-230 or Snap On XDHM 1415, on the centre bo lt of the belt tensioner
idler pulley, to turn the adju ster assembly to the left,
viewed from the front, against spring tension.
2. Whilst holding the tensioner against spring tension, remove the drive belt from the generator pulley.
Release the tensioner sl owly and remove the
spanner.
D
isconnect the belt from the ot
her pulleys, as necessary.
1. In
stallation is the
reverse of the remova l procedure. Ensure
that the belt is correctly and sq uarely located on each pulley.

Accessory Drive - Accessory Drive Belt
4.0L SC V8 - AJ26
Re
mo
val and Installation
Remov
a
l
Installation

1.
Op
en the engine compartment and fit paintwork protection
sheets.
2. Remove the supercharger driv e belt, for access. Refer to
operation 18.50.08.
3. Check the belt wear indicator ma rks to confirm that the drive
belt is / is not within limits.

4. CAUTIO
N: When releasing the
belt tension, never apply
any torque in a clockwise direction to the pulley ce ntre bolt (left
hand thread) as it could subsequently loosen.
Remove the drive belt fro m the accessory drive.
1. Use a spanner e.g. Churchill JD-230 or Snap On XDHM 1415, on the centre bo lt of the belt tensioner
idler pulley, to turn the adju ster assembly to the left,
viewed from the front, against spring tension.
2. Whilst holding the tensioner against spring tension, remove the drive belt from the generator pulley.
Release the tensioner sl owly and remove the
spanner.
D i
sconnect the belt from the ot
her pulleys, as necessary.
1. Ins
tallation is the
reverse of the remova l procedure. Ensure
that the belt is correctly and sq uarely located on each pulley.
2. Refit the supercharger drive belt. Refer to operation 18.50.08.

Accessory Drive - Acce
ssory
Drive Belt Idler Pulley4.0L NA V8 - AJ27/3.2L
NA V8 - AJ26
Re
moval and Installation
I

nstallation


1.
O
pen the engine compartment and fit paintwork protection
sheets.
2. Remove the drive belt for access. Refer to Operation
(12.10.40)

3. R
emove the idler pulley.
1. Remove the securing bolt from the idler pulley.
2. Remove the idler pulley.
1. Installation is the reverse of the removal procedure. Tighten
the pulley securing bolt to 53-69 Nm. Ensure that the belt is
correctly and squarely lo cated on each pulley.

Accessory Drive - Accessory Drive Belt
Idler Pulley4.0L SC V8 - AJ26
Re
mo
val and Installation
I
n
stallation


1.
Op
en the engine compartment and fit paintwork protection
sheets.
2. Remove the supercharger driv e belt, for access. Refer to
operation 18.50.08.
3. Remove the accessory drive belt for access. Refer to Operation
(12.10.40)

4. Re
move the idler pulley.
1. Remove the securing bolt from the idler pulley.
2. Remove the idler pulley.
1. Installation is the reverse of the removal procedure. Tighten
the pulley securing bolt to 53-69 Nm. Ensure that the belt is
correctly and squarely lo cated on each pulley.
2. Refit the supercharger drive belt. Refer to operation 18.50.08.

Accessory Drive - Acce
ssory
Drive Belt Tensioner4.0L NA V8 - AJ27/3.2L
NA V8 - AJ26
Re
moval and Installation
I

nstallation


1.
R
emove the drive belt for access. Refer to Operation
(12.10.40)

2. Re
move the tensioner assembly, which includes the tensioner
pulley..
1. Remove the bolt whic h secures the tensioner
assembly to the engine.
2. Remove the tensioner assembly.
1. Installation is the reverse of the removal procedure. Tighten
the tensioner assembly securing bolt to 38-48 Nm. Ensure that
the belt is correctly and squa rely located on each pulley.

Accessory Drive - Accessory
Drive Belt Tensioner4.0L SC V8 - AJ26
Re
mo
val and Installation
I
n
stallation


1.
Op
en the engine compartment and fit paintwork protection
sheets.
2. Remove the supercharger driv e belt, for access. Refer to
operation 18.50.08.
3. Remove the accessory drive belt for access. Refer to Operation
(12.10.40)

4. Remove t
he tensioner assembly, which includes the tensioner
pulley..
1. Remove the bolt whic h secures the tensioner
assembly to the engine.
2. Remove the tensioner assembly.
1. Installation is the reverse of the removal procedure. Tighten
the tensioner assembly securing bolt to 38-48 Nm. Ensure that
the belt is correctly and squa rely located on each pulley.
2. Refit the supercharger drive belt. Refer to operation 18.50.08.

Starting System - Starting System
Description and Operation


Manufacturer - NipponDenso
Type - RA1.4.
Weight - 3.75 kg (8.27 lb)
Output - 1.4 kW
Rated Time - 30 seconds
Rotation - Clockwise, viewed from pinion end
The starter is of the pre-engaged type; loca ted at the rear left-side of the engine.
When the starter is operated from the key-switch, the engagement lever moves the pinion into mesh with the engine ring
gear teeth, the electrical contacts within the solenoid complete the high power circuit and the starter motor operates to turn
the engine.
Starter Relay

The starter motor control relay is, relay nu mber 5, located inside the engine compartment enclosure (left side of vehicle
RHD and right side of vehicle on LHD).