1994 JAGUAR XJ6 oil

Engine (V12)
3.2.1 ENGINE, GENERAL
The twelve cylinder, vee formation engine has a capacity of 6.0 liters. Each cylinder bank has a single overhead
camshaft and two valves percylinder. The engine has a fully mapped engine management system with digital ignition
and two ignition coils.
This section describes the service procedures to be carried out with the engine in situ.
It also covers the renewal of
the engine / transmission unit.
For information relating
tostrip-down, inspedion,fault diagnosis, renovation and rebuild work, referto the VI2 Engine
Service Manual.
X300 VSM 1 Issue 1 August 1994

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.
X300 VSM Issue 1 August 1994 2

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

Fuel, Emission Control & Engine Management (AJ16)
5.1.6 THROTTLE ASSEMBLY (SUPERCHARGED), RENEW
SRO 18.30.17 THROTTLE POTENTIOMETER
SRO 19.70.07 THROTTLE HOUSING GASKET
SRO 19.70.04 THROTTLE HOUSING
J 12-62 2
Fig. 1
Remove
. Disconnect battery.
. Remove the intercooler intake elbow.
. Raise vehicle on a four-post ramp.
. Remove the rear air duct to throttle body connecting hose.
Undo and remove bolts securing EGR supply pipe to manifold.
Remove EGR supply pipe gasket.
Reposition EGR sensor harness multi-plug from mounting bracket.
. Release throttle outer cable abutment from abutment bracket.
. Disconnect throttle inner cable from throttle linkage.
. Disconnect and remove return spring.
. Disconnect speed control actuator vacuum hose.
. Release cooling system pressure by slowly undoing the tank cap.
Tighten cap after pressure release.
. Remove abutment bracket assembly.
Disconnect idle speed actuator harness multi
-plug.
. Disconnect throttle potentiometer harness multi-plug.
. Fit pipe clamps to throttle housing cooling hoses and disconnect hoses from throttle housing.
Remove
the oil filter cartridge and gasket.
Remove speed control speed control bracket to throttle lever clevis pin and pin
circlip.
e
0
0
0
Issue 1 August 1994 10 X300 VSM

Manual Transmission & Clutch (AJ16)
SECTlON CONTENTS
Sub-section Title SRO Page
i to iv ............ Preliminary Pages ................................................................ i to iii
7.1.1 ............. Manual Transmission. Description ...................................................... 1
7.1.2 ............. Manual Transmission Assembly, Renew ............................ 37.20.0 1 ............. 2
7.1.3
............. Front OilSeal. Renew .......................................... 37.23.06 ............. 5
7.1.4
............. Rear OilSeal. Renew ........................................... 37.23.01 ............. 6
7.1.5 ............. Gearshift Lever, Renew ......................................... 37.16.04 ............. 6
7.1.6 ............. Gearshift Lever Draught Excluder, Renew ......................... 37.16.05 ............. 6
7.1.7. ............ Gearshift Lever Knob. Renew .................................... 37.16.11 ............. 7
7.1.8. ............ Gearshifi Lever/ Remote Control Assembly, Renew .................. 37.16.20 ............. 7
7.1.9 ............. Gear Selector Shaft - Rear, Overhaul .............................. 37.16.4 1 ............. 9
7.1.10.
........... Reverse Lamp Switch. Renew .................................... 37.27.01 ............. 9
7.1.11 ............ Layshaft Front Seal. Renew ...................................... 37.23.07 ............. 9
7.1.12.
........... Clutch. Description .................................................................. 10
7.1.14.
........... Clutch Assembly, Renew ........................................ 33.10.01 ............ 14
7.1.15. ........... Clutch Master Cylinder, Renew .................................. 33.20.01 ............ 76
7.1.16. ........... Clutch Slave Cylinder, Renew ................................... 33.35.01 ............ 17
7.1.17.
........... Clutch Slave Cylinder, Overhaul ................................. 33.35.07 ............ 17
7.1.18. ........... Clutch Hydraulic System. Bleed .................................. 33.15.01 ............ 18
7 . 1 . 7 3 ............ Clutch. Fault Diagnosis .............................................................. 11
X300 VSM i Issue 1 August 1994

Manual Transmission & clutch (AJ16)
I Molykote FB 180 grease
Brake (clutch) fluid
- minimum
DOT 4
Dexron IID Transmission oil
Loctite
573
Tivoli Kay Adhesives No. 5696
Withdrawal arm pivots / Gearshift lever ball
Clutch hydraulic system
Front cover securing bolts
Exhaust sealer also used
in
ZF automatic
transmissions
Application
Material removal to clean up clutch face
IU SERVICE DATA
Specification
Up to lmm maximum
X300 VSM iii Issue 1 August 1994

Manual Transmission & Clutch (AJ16)
. Remove front clamp from unit lift.
. Raise / lower unit with jack, no stands.
. Traverse lift under ramp and take weight of transmission.
. Adjust jacking platform angles to suit transmission.
. Adjust side and rear clamps to suit transmission and tighten clamp wing nuts.
. Fit the safety chain assembly to left hand arm of lift, and secure with peg.
Pass safety chain over transmission and engage in front arm of lift. Tighten the safety chain adjuster.
. Remove remaining transmission to adaptor plate securing bolts and carefully lower transmission from engine.
. Remove transmission from ramp area.
. Remove clutch release bearing assembly from release lever.
. Remove clutch release lever retaining clip and remove lever.
. Remove release lever pivot pin.
Remove transmission switch.
. Remove rear mounting spring retainer securing nut.
. Reposition selector shaft pin cover.
0
Remove rear mounting spring retainer and remove rear mounting assembly.
Remove selector shaft yoke to selector shaft retaining pin and remove the yoke.
. Remove slave cylinder securing studs.
. Remove the transmission from the unit lift.
. Remove transmission drain plug and allow to drain, refit
the drain plug.
Fit new transmission to unit lift.
Fill transmission with oil and refit the level plug.
. Clean components and mating faces.
. Fit the slave cylinder mounting studs.
. Lubricate the selector output shaft.
. Fit selector shaft yoke (3 Fig. 1) to selector shaft and secure
with retaining pin (2 Fig. 1).
Reposition the retaining cover (1 Fig. 1) over the selector
shaft yoke retaining pin. -
. Fit the transmission rear mounting assembly and secure
with bolt.
. Fit reverse lamp switch.
. Lubricate the clutch release lever.
. Fit and align lever to transmission and engage onto pivot
pin.
Fit and fully seat lever to pivot retaining clip.
= Lubricate release bearing housing.
9 Fit and fully seat bearing assembly to lever.
. Select third gear.
. Move transmission to vehicle and raise into position.
Fia. 1
. Insert transmission input shaft into clutch and fully seat transmission against adaptor plate, ensuring that trans- mission is in line as it is fitted and seated to the plate.
X300 VSM 3 Issue 1 August 1994