air conditioning JAGUAR X308 1998 2.G User Guide

Using the special tool, remove the oil filter.
19. Remove the oil pressure switch.
For additional information, refer to Oil Pressure Switch
- in this
section.

20. Remove the crankshaft position sensor.
1. Remove the bolt which secures the crankshaft position sensor to the flywheel housing.
2. Remove the access grommet from the housing.
Remove the sensor and allow it to hang free under the
engine.
Release the harness clips from the oil pan body.

21. Remove the bolt which secures the transmission cooler pipes
and remove the clamping bracket.

22. Release the air conditioning compressor.
Remove the lower securing bolts.
Loosen, but do not remove, th e upper securing bolts.
Release the compressor from the lower dowel.
23. Remove the four bolts (two each side) which secure the
exhaust downpipes to the oil pan body.

11. Install the oil pressure switch.
For additional information, refer to Oil Pressure Switch - in this
section.

12. NOTE: Apply a suitable amount of clean engine oil to lubricate the oil filter O-ring seal.
Using the special tool, install the oil filter.
Tighten the oil filter to 15-18 Nm.

13. Install the crankshaft position sensor.
1. Install the sensor to the flywheel housing and fit the
securing bolt. Tighten to 8-12 Nm.
2. Install the access grommet to the housing.

14. Install the four bolts (two each side) which secure the
exhaust downpipes to the oil pan body.
15. Install the air conditioning compressor.
Locate the compressor onto the lower dowel.
Tighten the upper securing bolts.

T
he cooling system for the supercharged engine is very similar
to the normally aspirated engine, but with the addition of a
water cooled, intake air charge cooling system. This comprises a radiator, an electrically operated water pump and two
charge air cooler assemblies (heat exchangers) - one for each bank. The system works independently, but is connected to the
main cooling system at the bottom hose to allow for therma l expansion and to help to prevent unwanted circulation.
The condenser for the air conditioning system fits between th e coolant main radiator and the charge air cooling system
radiator.
Cylinder Block Heater, Drain Location
ItemDe
scription
1Rad

iator - Intake Air Coolant
2Ele

ctrically Operated Coolant Pump
3Top Hose
4Charge Air Coo

lers -
Intake Air Cooling
5Fi
lling Point for Intake Air Cooling
6N

on-Return Valves - Heater
7Ele

ctrically Operated Coolant Pump
8Hea

ter Matrix
9Wate

r Valve - Heater Control
10EGR V

alve (when fitted)
11Thr

ottle Body
12Coolan

t Recovery Bottle
13H

eader/Expansion Tank
14Eng

ine Coolant Pump
15The

rmostat Housing
16Bottom

Hose
17Air Bleed

Pipes
18Rad

iator - Main Cooling System

The cooling
pack incorporates the radiator a
ssembly with integral transmission oil cool er (located in the radiator outlet tank),
an air conditioning condenser, and the cooling fans and cowl assembly.
The cooling pack on supercharged vehicles is the same as described above, but with the addition of a charge air cooler
coolant radiator located in front of the condenser.
Radiator Mounti
ng/Retention
T
he radiator is mounted on four rubber mounts, one on each
end of the upper and lower horizontal face. The two lower
mountings are supported on two isolated brackets mounted on the body; the lower cradle assembly has subsequently been
deleted.
A closing panel made from polypropylene, which retains the radiat or assembly, fits over the top of the radiator and is bolted
to the vehicle top panel.
Coolant Hoses - Engine

Whe r
e considered necessary, some hose conn
ections have an indication mark to ensure correct orientation of the hose when
being fitted.
All joints use spring-band clips, except small pipes on the bleed system joints - which use cobra clips. The heater feed and
return hoses use quick-connection unions.
Supply and return hoses for the heater are located between the cylinder banks.
A connection on the rear of the A-bank provides coolant supply for the electronic throttle and the EGR valve (where fitted).
The outlet from the electronic throttle connects to the return hose from the heater.
Cool
ant Header and Recovery Tanks
A recovery system comp
rising the header tank
and a recovery tank is fitted. The recove ry tank is located in front of the left
hand front wheel arch liner.
The header tank provides the cooling system filling point and carries the coolant level sensor. The pressure cap allows
controlled release of coolant to the re covery tank during normal operation.
The recovery tank accommodates the expansion of the system coolant during normal operation. On engine cool-down, the
coolant contracts and is returned to the main system.
Coo lin
g Fans
The two
rad
iator cooling fans are mounted in
a cowl assembly within the cooling module.
The fans are controlled by the ECM dependent on the demand fr om the cooling system (temperature) or the air conditioning
ItemDescrip
tion
1EGR
E
ngines
2Non
-
EGR Engines
3Hea
ter Connections

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

Power Assisted Steering Pump Drive
The power assisted steering pump pull
ey
is located on the left side, above the air-conditioning compressor.
Generator Dr
ive
The genera
tor is fitted on the
right hand accessory mounting.
Drive Belt

The drive belt should be inspected at every routine service for excessive wear and damage. A drive belt which displays
symptoms of cracking may be pe rfectly fit for further service.
Should cracking be detected, serviceability ma y be assessed using the following guidelines:
Fi
fteen cracks per rib over a 100 mm le
ngth of drive belt is acceptable.
Sec
tion(s) of belt missing from an
y rib is not acceptable and the drive belt must be renewed.
Ite
m
De
scr
iption
1Ac
c
eptable Drive Belt Cracking
2Unacceptable Drive Belt Damage

Intake Air Distribution and Filtering - Charge Air Cooler Radiator
Remo
val and Installation
Remov
a
l
1.
Op
en the engine compartment and fit paintwork protection
sheets.
2. Disconnect the battery.
1. Remove the battery cover.
2. Disconnect the battery ground cable.
3. Remove the engine radiator and air conditioning condensor
assembly. Refer to operation 26.40.01.
4. Remove the grill assembly fo r access. Refer to operation
76.55.15.

5. Drain th e charge air cooler radiator.
Reach t
hrough the front bumper
splitter vane to remove
the radiator drain plug.

6. Disc
onnect the radiator
hoses from the radiator.
1. Disconnect the coolant pump to radiator hose.
2. Disconnect the return hose.
3. Disconnect the bleed pipe.

7. Re
move the two radiator fixing bolts.
8. Displace and re-position the am bient air temperature sensor
and bracket.

I
nstallation



9.
Di
splace the radiator from
the top mounting rubbers.
1. Fit and seat the radiator to the top mounting rubbers.

2. F
it the two securing bolts.
Ensure that the ambient air
temperature sensor mounting bracket is secured by the
lefthand radiator bolt.
3. Re-connect the radiator feed ho se, return hose and bleed pipe.
Fit all hose spring clips.
4. Refill the radiator coolant. Refer to operation 26.10.01.
5. Fit the grill assembly. Refer to operation 76.55.15.
6. Fit the engine radiator and air conditioning condensor
assembly. Refer to operation 26.40.01.
7. Reconnect the battery. Refer to the battery reconnection
procedure in 86.15.15.
8. Remove the paintwork protection sheets and close the engine
cover.

re
placed.
E

vacuating the System
This process, the removal
of un
wanted air and moisture, is crit ical to the correct operation of the air conditioning system.
Moisture in the system can be highly de structive and may cause internal blockages due to freezing; water suspended in the
lubricating oil will dama ge the compressor. Once the system has been dismantled, or the refrigerant charge recovered, all
traces of moisture must be removed before recharging.
Specific procedures will vary depending on the individual characteristics of the recovery / recycle / recharge equipment, and
must be carried out exactly in accordance with the manufacturer 's instructions. However, it is recommended that initially
only the high-side valve be opened at the start of the procedure. After a short time a small depression should be seen on
the low-side, at which point the low-side valve may be opened and the evacuation process completed. If a vacuum is not
registered on the low-side, it may indicate that the expansion valve is permanently closed or that the system is blocked.
This simple check may save time and effort when the system is recharged.