1994 JAGUAR XJ6 Workshop Manual

3.2.2 ENGINE - GEARBOX/ TRANSMISSION
ASSEMBLY, RENEW
SRO 12.37.01/90
The engine /transmission unit on the V12 6.0 liter model is mounted on three engine mounting / bracket assemblies
fitted to the front crossmember on either side of the engine bay. The engine/ transmission rear mount is a mounting
bracket and spring assembly fitted and secured to body underframe longitudinal members. For access to remove the
engine carry
out the following procedures:
WARNING: WHEN WORKING WITHIN THE ENGINE COMPARTMENT, KEEP CLEAR OF THE RADIATOR COOLING
FANS AS THEY COULD START WITHOUT WARNING, EVEN IF THE ENGINE IS NOT RUNNING.
. Remove the hood, see SRO 76.16.01, section 13.
. Remove the two air cleaner assemblies, see SRO’s 19.10.01 & 19.10.02.
. Remove the engine cover, see SRO 12.29.93 (V12 Engine Service Manual).
Depressurize the fuel system, see SRO 19.50.02, section 5.1.
In line with the relevant SRO’s and sections, remove all appropriate obstructing parts, including their fixing and
. Disconnect all mechanical and isolate all electrical linkages leading to and from the engine.
. De-gas the air conditioning system, see section 14, Charge Recovery (System depressurization).
Disconnect
the battery.
mounting arrangements.
CAUTION: Do
not vent refrigerant directly to the atmosphere and always use Jaguar approved recovery/recycle/ra charge equipment.
Drain the engine oil, see 3.2.3 this section.
Drain the coolant, see SRO 26.10.01, section 4.1.
WARNING: DO NOT REMOVE THE HEADER TANK PRESSURE CAP WHILE THE ENGINE IS HOT. IF THE CAP MUST
BE REMOVED, PROTECT THE HANDS AGAINST ESCAPING STEAM AND SLOWLY TURN THE CAP ANTI- CLOCKWISE UNTIL THE EXCESS PRESSURE CAN ESCAPE. LEAVE THE CAP IN THIS POSITION UNTIL ALL
STEAM AND PRESSURE HAS ESCAPED AND THEN REMOVE THE CAP COMPLETELY.
Before
lifting the complete engine/transmission unit with an engine hoist from the engine bay, ensure that two engine
lifting brackets (tool 18G. 1465) are secured equallyspaced to the inlet manifold studs. The four engine lifting brackets
should be positioned towards the front and the rear of the assembly. Ensure the front of thevehicle is jacked
up secure- ly on stands when removing the assembly.
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Engine (V12)
3.2.3 ENGINE OIL, RENEW
SRO 12.60.00
. Undo and remove the sump plug positioned at the rear of
the sump, drain the engine oil into a suitable receptacle
and dispose of
it in a safe and environmentally friendly
manner.
. Replenishtheengineoiltothecorrect level (1 Fig. 1) onthe
dipstick.
1ynfa: If the '0' ring on the on the filler cap is damaged, re- move the '0' ring and clean the groove. Secure a
new '0' ring in position using silicon sealant. Treat
the screw threads with copper grease, and grease
the top face of the oil filler with Hylosil lubricant.
When the oil is renewed, start the engine, wait for the oil
light to extinguish and switch off the engine for 30 sec- onds.
. Finally remove and wipe clean the dip stick
(Fig. l), check the oil level - replenish as necessary.
For recommended engine oil refer to Appendix AI. Fig.
1
3.2.4
OIL FILTER CARTRIDGE, RENEW
SRO 12.60.04
The white oil filter cartridge displaying the Jaguar logo, is lo- cated on the lower left-hand side of the engine, near side of
the sump. Access for removing the cartridge is from under- neath the vehicle (Fig. 2).
Remove the catalyst heat shield (where fitted) and use a coil
spring type filter wrench to remove the cartridge.
Start and run the engine for a few seconds to charge the
filter, then stop the engine and
checkthe oil level. Replenish
as necessary.
I Fig. 2
Issue 1 August 1994 X300 VSM 3
r

Engine (V12)
3.2.5 OIL COOLER, RENEW
SRO 12.60.68
The oil cooler is located below the radiator, behind the front
bumper and is fitted to the radiator lower mounting using
two securing bolts. The cooler feed pipe comprising several
sections and return pipe (Fig.
1) are connected to the oil
cooler by means of easily detachable quick
-fit connectors.
3.2.6 FRONT ENGINE MOUNTING BRACKET
SRO 12.45.01 LH
SRO 12.45.03 RH
Each of the two engine mounting bracket assemblies com- prises a hydraulic mount (1) secured to an engine side
mounting bracket (2) which in turn is bolted to the lower en- gine housing. The engine mounting heat shield (3) is fixed
to the hydraulic mount studs (41, protruding through the
centre hole of the engine side mounting bracket.
The front of the engine complete with attached mounting
bracket assemblies is seated on support brackets welded to
the front crossmember and is secured to the brackets by a
single fixing arrangement comprising bolts and washers.
. Jack up the vehicle and secure the engine hoist (Service
Tool MS53 C) to lifting eyes of the front engine lifting
brackets
Remove the front engine mounting bracket assembly to
front crossmember fixing bolts.
Thesecan be accessedvia two round openings positioned underneath the cross- member.
Remove any obstructing parts preventing the front end of
engine from being lifted from its seating.
Lift the front end of the engine /transmission unit slightly
and detach the front mounting bracket assemblies from
the lower engine housing.
ASSEMBLV, RENEW
Fig. 1
4 X300 VSM Issue 1 August 1994

Engine (V12)
3.2.7 REAR ENGINEMOUNTlNGASSEMBLY, RENEW
SRO
12.45.04
The rear engine mounting assembly (Fig. 1) comprises a
mounting bracket and spring assembly, secured to body un- derframe longitudinal members using nuts and washers.
With the aid of the engine hoist (Service Tool MS53 C) se- cured to the lifting eyes of the rear engine lifting brackets,
and a jack positioned underthe rear mounting brackettake
the weight of the engine.
. Undo and remove the mounting bracket and spring as-
sembly fixing arrangement.
rn Lower the jack and remove assembly.
Dismantle the assembly, clean all components and exam-
ine for any signs of wear or damage.
Renew components as necessary.
8 112-8'7
Fig. 1
I Issue 1 August 1994 X300 VSM 5

Cooling System
SECTION CON TENTS
Sub-section Title SRO Page
I to IV ............ Preliminary Pages .................................................................... i
4.7.7 ............. Cooling System Description ........................................................... 7
4.1.7.7 ........... Cooling System Description. Major Components .......................................... 7
4.7.7.2 ........... Cooling System Description. Components for Climate Control System ........................ 7
4.7.1.3 ........... Cooling System Description. Components for Superchargwl Engine .......................... 7
4.7.7.4 ........... Cooling System Description. Operation .................................................. 7
4.7.2 ............. Cooling System Configuration .......................................................... 2
4.7.3 ............. Service Procedures ................................................................... 3
4.7.3.7 ........... Service Procedures. Safety Precautions .................................................. 3
4.7.3.2
........... Service Procedures. Working Practices .................................................. 3
4.7.3.3
........... Service Procedures. Coolant Change .................................................... 3
4.7.4.
............ Drain and Fill Procedures ............................................................. 4
4.7.4.7
........... Drain and Fill Procedures. Radiator, Drain ............................................... 4
4.7.4.2
........... Drain and Fill Procedures. Engine. Drain ................................................. 4
4.1.4.3
........... Drain and Fill Procedures. Radiator, Fill ................................................. 4
4.7.4.4
........... Drain and Fill Procedures. Complete System. Fill .......................................... 5
4.7.5 ............. Fault Diagnosis ...................................................................... 6
4.1.5.7 ........... Fault Diagnosis. Introduction ........................................................... 6
4.7.5.2 ........... Fault Diagnosis. Diagnostic Procedures .................................................. 6
Issue 1 August 19! X300 VSM i

€3 Cooling System (AJ16)
Fixing
Fan cowl assembly to radiator
Header tank bracket to body
Header tank to body
Hose clip,
all except those shown below
Hose clip, bleed hose to radiator
Radiator drain plug
Radiator temperature switch
Lower
radiator cradle to body
Supercharger pump mounting
Supercharger pump to instrumounts
Supercharger radiator to body
Top radiator panel to body
1. SERVICE TOOLS & EQUIPMENT
No Jaguar service tools are required for working on the cooling system. Some normal workshop items will be required,
including
a pressure tester, hydrometer and thermometer.
Tightening Torque
(Nm)
8-9
7-1 0
2,5-3,5
2,5-3,5
1,5-2,5
1,5-2,5
13-17
7
-1 0
7-10
5-7
7-10
7
-10
Description UseS
To be issued
111. SERVICE MATERIALS
Notes
Iv: SZRVICE DATA
Application
Engine thermostat temperature rating
Coolant header cap pressure rating
Generator
/ water pump drive belt tension, new belt
Generator
/ water pump drive belt tension, service
tension
_____ ~~ Generator / water
pump drive belt tension measuring
point
Smcification
88OC
1,2 bar
Set to:
Run for one minute and allow belt to cool.
Reset to: (Burroughs method) 511 to
534 N;
Burroughs method: 51 1 to 534 N.
Clavis method: 167 to 173 Hz
Mid
-way between crankshaft and generator pulleys
(Burroughs method)
556 to 578
N;
(Clavis method) 174 to 180 Hz.
(Clavis method) 167 to 173
Hz
0
0
0
0
X300 VSM Issue 1 August 1994 ii

Cooling System (AJl6) m
4.1.1 COOLING SYSTEM DESCRIPTION
4.1.1.1 Major Components
o Main engine crossflow radiator, incorporating a concentric tube cooler for the power steering fluid mounted in
the right
-hand radiator side tank. Vehicles with automatic transmission have a transmission fluid cooler
mounted in the left
-hand radiator side tank; for 4,O liter supercharged engines a six-plate cooler is fitted; other
vehicles have
a tube-type cooler. Adouble-action temperature switch, for controlling the radiator cooling fans,
is mounted in the left
-hand radiator side tank.
0 Two electrically operated radiator cooling fans, mounted behind the main radiator.
0 Coolant circulating pump, belt driven from the engine crankshaft.
0 Coolant header tank with pressure relief cap and coolant level probe.
o Engine thermostat.
4.1.1.2
0 Heater matrix.
o Electrically operated coolant circulating pump, mounted on the left-hand side of the engine bulkhead.
o Solenoid operated valve, located adjacent to the coolant circulating pump.
Components for Climate Control System
4.1.1.3 Components for Supercharged Engine
0 0 Supercharger crossflow radiator, mounted in front of the main radiator. The supercharger radiator is reverse- circuited, i.e. the coolant inlet is at the bottom of the radiator.
0 Electrically operated coolant circulating pump, located at the left-hand side of the main radiator.
4.1.1.4 Operation
The configuration of the cooling system for normally aspirated and supercharged (4,O liter) engines is shown in Sub- section 4.1.2.
The cooling system is pressurized, which allows the system to operate at a higher temperature without overheating.
The header tank is fitted with a pressure relief cap to protect the system against overpressure.
Under cold start conditions, coolant is forced by the engine driven water pump through the cylinder block and cylinder
head to the thermostat housing. The thermostat is closed to give rapid engine warm up, hence the coolant is returned
directly to the water pump inlet. When normal engine operating temperature is reached, the thermostat opens and
coolant is diverted through the radiator before returning to the water pump inlet. In vehicles fitted with
a supercharger,
coolant is circulated through the supercharger radiator and intercooler by the supercharger water pump. The super- charger cooling circuit uses the same coolant header tank as the main engine cooling system.
The radiator cooling fans operate in series and parallel under the control of the double
-action radiator mounted tem- perature switch. The fans are also controlled by the climate control system on vehicles fitted with air conditioning.
Under hot operating conditions, the fans may continue to operate after the engine has been switched off. The fans
stop automatically when the coolant temperature has been reduced sufficiently.
The system also provides the coolant supply for the climate control system, which is described in Section
14.
X300 VSM 1 Issue 1 August 1994