1998 JAGUAR X308 catalytic converter

        309: Exhaust  Syst
em
 
 
             309‐00:  Exhaust  System 
                 Specification  
                 Description  and  Operation  
                     Exhaust System  
                 Diagnosis  and  Testing  
                     Exhaust System  
                 Removal and  Installation  
                     Catalytic Converter  LH  (17.50.15)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA V8  ‐ AJ27  
                     Catalytic Converter  LH  (17.50.15)  ‐ 4.0L  SC  V8 ‐ AJ26,  Vehicles  With:  
            Supercharger  
                     Catalytic Converter  RH  (17.50.16)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA V8  ‐ AJ27  
                     Catalyt
ic Converter  RH  (17.50.16)  ‐ 4.0L  SC  V8 ‐ AJ26,  Vehicles  With:  
            Supercharger  
                     Catalytic Converter  Gasket  LH  (17.50.06)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Catalytic Converter  Gasket  LH  (17.50.06)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Catalytic Converter  Gasket  RH  (17.50.07)  ‐ 3.2L  NA V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Catalyt
ic Converter  Gasket  RH  (17.50.07)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Front Muffler  (30.10.18)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA V8  ‐ AJ27  
                     Front Muffler  (30.10.18)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Intermediate  Muffler LH  (30.10.15)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Intermediate  Muffler LH  (30.10.15)  ‐ 4.0L  SC  V8 ‐ AJ
26  
                     Intermediate  Muffler RH  (30.10.16)  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ27  
                     Intermediate  Muffler RH  (30.10.16)  ‐ 4.0L  SC  V8 ‐ AJ26  
                     Muffler and Tailpipe  LH (30.10.22)  
                     Muffler and Tailpipe  RH (30.10.52)  
 
        310:  Fuel  System  
 
             310‐00:  Fuel  System  ‐ General  Information  
                 General Procedures  
                     Fuel System  Pressure  Check  
                     Fuel Tank  Draining  
 
  
Fuel  Sy stem  Pres
sure
 Release  

Mem
ory
Pulse Width ModulationPW

M
A
method of control in an electronic co
ntrol system in which the duration of
pulses in a pulse train is proportional to the amplitude of the modulating
signal
R
Ran
dom Access Memory
RAMF
ast access memory store which is accessible for entry or extraction of data
Re

ad-Only Memory
RO
M
F
ast access memory in which data
is fixed and may not be changed
Re
servoir
RESContaine
r, usually for oils,
coolants or hydraulic fluids
Re
turn
RTNA
dedicated sensor ground circuit
R

evolutions Per Minute
RP
M
Shaft speed o
f a device, us
ually an engine or motor
R
ight-hand
RH
Right-hand drive veh

icle
RHD
S
Scan T

ool
STDe
vice that interfaces with and comm
unicates information on a data link
Se
at Control Module
SCMModule
controlling the seat motor systems (not electric raise/lower-only
seats)
Secon
dary Air
Air pro
vided to the exhaust system
Secon

dary Air Injection
AIRSy
stem used for a period of time each
time the engine is started, unless
certain temperature criter ia are met. Pumps air directly into the exhaust
system which generates extra heat and reduces the time taken for the
catalytic converters to reach operating temperature
Secon
dary Air Injection
Bypass
AIRBVents secon
dary air to atmosphere
Secon

dary Air Injection
Check Valve
AIRCValve wh
ich prevents back-flow of exhaust gas to the AIR system when the
system is inoperative
Secon
dary Air Injection
Diverter
AIRDD
iverts secondary air to either
the catalyst or exhaust manifold
Secon
dary Air Injection
Magnetic Clutch
AIRP
C
Clu
tch mounted on the AIRP drive shaft
Secon

dary Air Injection
Pump
AIRPMe
chanically driven rotary vane
pump, driven through the AIRPC
Secon
dary Air Injection
Relay
AIRRCont
rols the injection of air into the exhaust system
Secon

dary Air Injection
Switchin
g Va
lve
AIRSV
acuum operated valve backing-up the AIRC
Secu

rity and Locking
Control Module
SLCMModul
e controlling the vehicle's security and closure-locking functions
SensorSGeneri

c name for a device
that senses either the absolute value or a change
in a physical quantity su ch as temperature, pressure or flow rate, and
converts that change into an electrical quantity signal
Servic
e Repair Operation
(number)
SRONu
mber generated by Jaguar Methods
and Techniques system which relates
to the time allowed to complete a repair operation. Further information on the
system can be found in the separate Jaguar Publications (for each model
range) entitled 'Repair Operation Times'
Shif
t signal
SDA
shift process signal to the TCM on SC vehicles
Shif

t Solenoid
SSControls shi
fting in an automatic transmission
Si

gnal return
SIG RTN
Slidin

g Roof Control
Module
SRCM
Society of Automotive

Engineers
SAE
Speed
Control Control
Module
SCCMModule con
trolling Speed Control System
Square c

entimeter
cm
2
Stan

dard
std
Stan

dard Corporate
Protocol
SCPA
high-speed, serial communications system linking all body system control
modules. Control messages and data ar e passed between modules at up to
786 messages per second
SuperchargerSCAn in
take system which utilizes a supercharger (mechanically driven device
that pressurizes intake air, thereby in creasing density of charge air and the
consequent power output from a given displacement)
Supercharger
Bypass
SCB
SwitchSW
T

7.
Remove the coolant outlet pipe.
1. Remove the four bolts which secure the outlet pipe.
2. Remove the outlet pipe from the bypass hose and from the cylinder heads.
8. Remove and discard the sealing ring s from the outlet pipe grooves.

9.
Remove the nuts which secure the catalytic converter to the B-Bank
exhaust manifold flange.

10 . Re
move the VVT bush carrier.
1. Remove the two bolts and one nut which secure the carrier to the cylinder block.
2. Release the carrier from the two ring dowels and remove it.

11. R
emove the seals from the bush carrier.
1. Remove the sealing ring (scarf jointed) from the carrier bush groove.
2. Remove the O-ring from the carrier oil-way recess.
12. Raise the vehicle on a ramp.
13. Remove the crankshaft position sensor.

7.
Remove the coolant outlet pipe.
1. Remove the four bolts which secure the outlet pipe.
2. Remove the outlet pipe from the bypass hose and from the cylinder heads.
8. Remove and discard the sealing ring s from the outlet pipe grooves.

9.
Remove the nuts which secure the catalytic converter to the A-Bank
exhaust manifold flange.

10 . Re
move the VVT bush carrier.
1. Remove the three bolts which secure the carrier to the cylinder block.
2. Release the carrier from the two ring dowels and remove it.

11. R
emove the seals from the bush carrier.
1. Remove the sealing ring (scarf jointed) from the carrier bush groove.
2. Remove the O-ring from the carrier oil-way recess.
12. Raise the vehicle on a ramp.
13. Remove the crankshaft position sensor.

Engine - Exhaust Manifold LH
In-vehicle Repair
Removal
Installation

1.
Open the engine compartment and fit paintwork protection
sheets.
2. Remove the front silencer. Refer to Section 309-00.
3. Remove the downpipe catalytic converter, left hand side. Refer
to Section 309-00.

4. Working from above the vehicle, remove the bolts which secure
the front section of the exhaust manifold to the cylinder head.

5. If working on a left hand drive vehicle; working from below the
vehicle, reposition the steering rack for access.
1. Remove the two bolts which secure the steering rack at
the driver's side.
2. Loosen, but do not remove, the two bolts which secure the steering rack at the passenger side.
Reposition the steering rack for access.

6. Working from below the vehicle, remove the manifold.
1. Remove the bolts which secu re the rear section of the
exhaust manifold to the cylinder head.
2. Remove the manifold and the manifold gasket.
7. Clean the manifold faces (if refi tting) and the mating faces on
the cylinder head.
8. Use a thread tap (plug) to clean out the threads of the manifold
securing bolt holes, in the cylinder head.
1. Installation is the reverse of removal. Use new gaskets and new
securing bolts for the manifold.

Engine - Exhaust Manifold RH
In-vehicle Repair
Removal
1. Open the engine compartment and fit paintwork protection
sheets.
2. Remove the air cleaner assemb ly. Refer to Section 303-12.
3. Remove the front silencer. Refer to Section 309-00.
4. Remove the downpipe catalytic converter, right hand side.
Refer to Section 309-00.

5. From above the vehicle, disconnect the EGR pipe from the
exhaust manifold.
1. Remove the two nuts whic h secure the EGR flange to
the right hand exhaust manifold.
2. Reposition the EGR pipe from the manifold.

6. Remove the bolts which secure th e front section of the exhaust
manifold to the cylinder head.

7. If working on a right hand drive vehicle; reposition the steering rack for access.
1. Remove the two bolts which secure the steering rack at the passenger side.
2. Loosen, but do not remove, the two bolts which secure the steering rack at the driver's side.
Reposition the steering rack for access.
8. Working from below the vehicle, remove the manifold bolts.
1. Remove the bolts which secu re the rear section of the
exhaust manifold to the cylinder head.

3. Tighten the rack mounting bolts on the driver's side.

6. From above the vehicle, connect the EGR pipe to the exhaust
manifold.
1. Fit a new EGR gasket to the manifold.
2. Reposition the EGR pipe to the manifold.
3. Fit the two nuts which secure the EGR flange to the exhaust manifold.
7. Fit the downpipe catalytic converter, right hand side. Refer to
Section 309-00.
8. Fit the front silencer. Refer to Section 309-00.
9. Fit the air cleaner assembly . Refer to Section 303-12.
10. Remove paintwork protection sheets and close the engine
compartment.

Engine - Exhaust Manifold LH and RH
In-vehicle Repair
Removal
1. Open the engine compartment and fit paintwork protection
sheets.
2. Remove the downpipe catalytic converter, right hand side.
Refer to Section 309-00.
3. Remove the downpipe catalytic co nverter, left hand side. Refer
to Section 309-00.
4. Remove the front silencer. Refer to Section 309-00.
5. Remove the air cleaner assemb ly. Refer to Section 303-12.

6. Working from above the vehicl e, remove the bolts which
secure the front sectio n of the left hand exhaust manifold to
the cylinder head.

7. Working from below the vehicle, reposition the steering rack
for access.
1. Remove the two bolts which secure the steering rack at the driver's side.
2. Loosen, but do not remove, the two bolts which secure the steering rack at the passenger side.
Reposition the steering rack for access.

8. Working from below the vehicl e, remove the manifold.
1. Remove the bolts which secu re the rear section of the
exhaust manifold to the cylinder head.
2. Remove the manifold and the manifold gasket.
9. From above the vehicle, disconnect the EGR pipe from the
right hand exhaust manifold.
1. Remove the two nuts whic h secure the EGR flange to
the right hand exhaust manifold.
2. Reposition the EGR pipe from the manifold.