oil pressure JAGUAR XJ6 1994 2.G Workshop Manual

GLOSSARY OF TERMS
Introduction
This glossary of terms is intended to cover both general and emissions-related (to SAE J 1930) terminology. It is in- tended to enable the user to ascertain the meaning of standardized terms and acronyms used throughout the Manual.
The required term may be looked-up in the left-hand column, and subsequent columns give the standard abbreviation
or acronym, definitions and previously used terms, as applicable.
As this Manual is a world
-wide publication, and must comply with certain Society of Automotive Engineers Standards, it has been necessary to adopt the terminology etc. demanded by that Standard.
Term(s) Abbreviation Definition Previously used
(if applicable) term(s) (or Eng- lish Eauivalent)
A
throttle pedal
accelerator Dedal AP
AI= measurement across the spanner flats of a
across flats
nut or bolt head
adaptor
AC.
aircon
adapter
after bottom dead center
after
too dead center event
occurring after BDC
event occurring after TDC
ABDC
ATDC ACL
AIC
ACS
Air
Cleaner
Air Conditioning
Air Conditioning Signal air conditioning
compressor clutch
operation is signalled to the PCM which
induces idle speed corrections to
compensate for engine load changes
module controlling air conditioning, heating
and ventilation
wing or similar, designed to obtain some
effect from the flow of air over
it
electrical current whose flow alternates in
direction, in a sinusoidal waveform
NCCM Air Conditioning Control Module
airfoil aerofoil
alternating current ac
aluminium
aluminum
Ambient temperature Temperature
of the air surrounding an object
SI unit of current AmDere A Amp Amp. hour -~ 1 Ampere flowing for one hour
system, usually ele&o&ally controlled (but ~- __. .. . Ampere hour
Anti
-Lock Braking System Ah
ABS can be mechanically) which prevents wheel
lock
-up under braking by sensing lack of
rotation of a wheel(s) and diverting fluid
pressure away from
it (them). Originally Anti-Blockier System (Bosch).
ABS control module
ABS
/ traction control control
module ABS
CM
ABS I TC CM
aerial
antenna (plural, antennae or
antennas)
analog
Analoa Volt-Ohm meter analogue
AVOM unit of pressure
(1.01325 bar)
atmospheres
automatic transmission atm
auto,
auto gearbox
drive shaft
axle shaft shaft
transmitting power to the rear wheel
hubs
.-
Issue 1 August 1994 X300 VSM 7

Term(s) Abbreviation Definition Previously used (if applicable) term(s) (or Eng- lish Eauivalent)
K
kilogrammes (mass) kg
kilogrammes (force) kgf
kilogrammes force per square kgf/cm2 centimeter
kilometers
km kilometres
kilometers per hour
km/h km/h, kph
kilopascals
kPa
kilovolt kV
knock
I
the sharp metallic produced sound when two
pressure fronts collide in a combustion
1 chamber (see also ping)
I sensor which detects the onset of detonation I knock sensor KS I and signals the ECM to retard the ignition I
L
lash
left
-hand LH
left
-hand drive vehicle LH D
left-hand thread LH Thd
levelina
I
license I
license plate
liquid crystal display LCD
Liter
I L
louver
lowered beam
lug nut free
play, end-float
optical digital display system, applied
voltage to which varies the way the crystals
reflect liaht,
thereby modifvina the display
primary circuit
of the ignition system, linking
the battery to the primary winding in the
ignition coil levelling
licence
registration
plate,
number
date
Litre
louvre
diooed beam
wheel nut
Issue 1 August 1994 18 X300 VSM

(if applicable) term(s) (or Eng- lish Equivalent)
N
National Institute of Occupational NIOSH Safety & Health (US)
Newton N SI unit of force. 1 N = 0.2248 pounds force
Newton meters Nm
SI unit of torque. Must not be confused with nm (nanometer)
compounds of nitrogen and oxygen formed
at high temperatures. Major source of
exhaust
-gas air-pollution
RAM which retains memory even if power
N
Ox
NVRAM
Memory supply is interrupted
normally aspirated fueling system using intake air at
atmospheric pressure; not supercharged or
turbocharged
Normally Closed NC
Normally Open NO
North American Specification NAS vehicles for sale
in the USA and Canadian
markets
0
I number I No.
octane number
I
I open circuit
I oriainal eauiDment manufacturer
I outside diameter OSHA
OBD
OEM
0. dia
OHC
oc
N Ox
02s
measure ofthe anti-knockproperties ofafuel
instrument which records the total mileage
covered by a vehicle
a system that monitors some or all computer
input and output control signals.
Signal(s) outside the pre-determined limits imply a
fault in the svstem or a related svstem
a circuit which does not provide a complete
path for flow of current
engine configuration with single camshaft
positioned above the valves
catalytic converter system that reduces
levels
of HC and CO
a sensor which detects oxygen content in the
exhaust gases mileometer
oilwav
EGO,
02 EOS,
EGS, OS, EGOS,
Lambda Sensor
Issue 1 August 1994 20 X300 VSM

Engine (AJ16)
3.1.2 ENGlNE/ TRANSMlSSlON UN/& RENEW
SRO 12.41.02/20
The engine/transmission unit on the AJ 16 normally aspirated and supercharged engined vehicles are fitted ontothree
engine mounting/bracket assemblies. The two front engine mountings for the 3.2/4.0 liter normally aspirated and the
4.0 liter supercharged engined vehicles are identical. They are fitted to the front crossmember on either side of the
engine bay. Rubber to metal
engine/transmission rear mounts used for both engine types, are secured to a support
bracket which traverses the two body underframe longitudinal members. For access to remove the engine carry out the following procedures:
WARNING: WHEN WORKING WlTHlN 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 air cleaner assembly.
. Depressurize the fuel system, see SRO 19.50.02, section 5.1.
Disconnect the battery.
. 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 airconditioning system, see section 14, Charge Recovery (System depressurization).
mounting
arrangements.
CAUTION : Do not vent refrigerant directly to the atmosphere and always use Jaguar approved recovery/recycle/re- charge equipment.
. Drain the engine oil, see 3.1.3 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 UNTILTHE EXCESS PRESSURE CAN ESCAPE. LEAVETHE 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 equally spaced to the inlet manifold studs. The engine lifting brackets
should be positioned towards the front and the rear of the assembly. Ensure the front of the vehicle is jacked
up secure- ly on stands when removing the assembly.
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X300 VSM Issue 1 August 1994 2

Engine
3.1.3 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.
Replenish the engine oil, to the correct level on the dip-
stick (see Fig. 1).
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,
check the oil level - replenish if necessary.
. For recommended engine oil refer to Appendix AI.
3.1.4 OIL FILTER CARTRIDGE, RENEW
SRO 12.60.04
The white oil filter cartridge displaying the Jaguar logo, is lo- cated on the left-hand side of the engine below the throttle
assembly (Fig. 2).
When refitting, tighten the oil filter cartridge using hand
pressure only.
On no account use an oil filter strap designed
forthe removal
of cartridges.
m: The normal tightening torque of the oil filter is a 3/8 to 1/2 turn after initial contact.
1 JLX-076
Fig. 1
-~ ~ ~~~~~ Issue 1 August 1994 X300 VSM 3

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

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.
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Issue 1 August 1994 10 X300 VSM

Manual Transmission & Clutch (AJl6)
0
7.1.13 CLUTCH FAULT DIAGNOSIS
symptom
lifficult gear ?ngagement
3attling clutch
squeaking clutch
dibrating clutch or
:lutch judder (often pre- :eded by clutch grab)
stiff clutch operation
Possible Cause
Hydraulic system
defects
Operating mechan
- ism faults
Clutch unit faults
Primary pinion bear
-
ing fault
Clutch unit faults
Defects other than in
clutch unit
Operating linkage
fault
Check
Check fluid level in reservoir
Check for air in the system
Check for defective pedal
Check for damaged pressure plate
Check splines on clutch driven
plate and primary pinion shaft for
wear
Check clutch driven plate for loose
or broken springs and for warping
Check for wear in the clutch with
- drawal mechanism
Check for worn primary pinion
bearing
Check for seizing on primary shaft
or in flywheel
Check the clutch driven plate for
distortion and damage and for
loose or broken torque damper
springs
Check for oil and other foreign
matter on the clutch friction linings
Check for incorrectly fitted clutch
pressure
plate
Check that contact witness on fric-
tion linings is evenlv distributed -
Check for loose flvwheel fixings
and flywheel
run-out
Check for loose engine mountings
Check for worn drive (propeller)
shaft universal joints
Check for bent primary pinion
shaft
-
Check for damaged moving parts
in operating linkage
- -
Check for seized linkage, recheck
operation after remedv
Remedy
Replenish as necessary and
bleed system if necessary
Bleed the system
Renew return spring if
necessary
Renew pressure plate
Renew as necessary clutch
plate or primary pinion
Renew driven plate
Renew as necessary
Renew as necessary
Lubricate or renew as
necessary
Renew driven plate
Renew driven plate and clean
related parts
Dismantle from clutch and
refit where applicable
Renew driven plate as
necessary
Tighten to correct torque
loading
Lubricate linkage as
necess-
X300 VSM 11 Issue 1 August 1994

Manual Transmission & Clutch (AJ16)
'ossible Cause
:Iutch Fault
'rimary pinion bear-
ng
ncorrect fitting nethod
Clutch Fault Diagnosis
Check
Check for worn clutch driven plate
hub splines
Check for wear in bearing
Damage may be caused by
acci- dental loading during fitting
Symptom
:I utch knocks
herloading vehicle
hiving with
left foot
,esting on clutch )edal
:ractured clutch )late
Check mating components for
damage
Refer to owners handbook for per
-
missible load details
Check as described under 'slipping
clutch'
Excessive
lining wear
lperating mechan-
sm faulty
:Iutch unit faults
3rabbing clutch
harsh engagement
'rom standing start,
Iften followed by clutch
udder) Check
operating mechanism for
wear and binding which usually
indicates
a binding withdrawal
race thrust bearing
Check pedal for sticking parts in
-
cluding return spring
Check for oil on friction driven
plate
Checkclutch plate and flywheel for
wear. Check flywheel
runout. Check also for glazing on driven
plate linings
Check for driven plate hub splines
sticking on pinion shaft.
Check pinion shaft for wear.
Check for broken or weak pressure
springs.
Check torque damper springs in
clutch driven
plate
hgine mounting Check
for damaged or deteriorated
engine mountings.
Check fixings for tightness
Remedy
Renew driven plate
Renew as necessary
Always support trans
- mission weight during fitting
Renew driven plate
Fit replacement clutch as-
sembly
Fit replacement clutch as- sembly
Free
off bearing. Renew as
necessary
Free
off pedal and check for
damaged and distorted
parts.
Renew
if necessary
Clean
off cover.
Renew faces.
Rectify oil
leak
Reclaim or renew as appli-
cable
Free driven plate, and check
for wear and distortion
Renew
if necessary
Renew
if necessary
Issue 1 August 1994 12 X300 VSM

Clutch Fault Diagnosis
Symptom
Slipping clutch
[indicated by vehicle
speed not responding to
engine speed increase)
]ragging or spinning :lutch
Manual Transmission & Clutch (AJ16)
Possible Cause
Poor driving tech- nique
Operating mechan
-
ism faulty
Clutch unit faults
Operating mechan
-
ism faulty
Zlutch unit faults
2lutch unit faults
Check
Ensure that none of the remedy
conditions prevail
Checkfor binding withdrawal lever
Check for binding of clutch pedal
movement components
Check for oil on friction faces
Check for binding withdrawal lever
Check for binding of clutch pedal
movement components
Check for oil on friction faces
Check for broken or weak pressure
springs
.-
Check clutch plates and flywheel
for wear and distortion
Check clutch driven plate for frac
- tures and distortion.
Damage may be caused by acci
-
dental loading during assembly of
transmission to engine.
Always support transmission
weight during refitting
Check for primary pinion bearing
seized
Check clutch driven hub for bind
- ing on primary pinion splines.
Check for too thick friction linings.
Ensure linings
are good
Check for foreign matter in clutch
unit
Remedv
Do not increase engine speed
with clutch paGially' en-
gaged. Do not drive with left foot
resting on clutch pedal.
Free lever and check for wear
and distortion
Free
off seized or binding
components
Clean
off metal faces.
Renew driven plate.
Rectify oil leak.
Free lever and check for wear
and distortion
Free
off seized or binding
components
Clean
off metal faces.
Renew driven plate.
Rectify oil leaks.
Renew cover as necessary
Reclaim or renewclutch
plate
as applicable
Renew driven plate and
check mating components
for damage
Rectify or renew as necess
-
ary
Renew as necessary
Clean and renew compo
-
nents as necessary
X300 VSM 13 Issue 1 August 1994