catalytic converter JAGUAR X308 1998 2.G Repair Manual

6. R
aise the vehicle on a ramp.

7. R
emove the bolts which secure
the rear of the front muffler
assembly to the engine rear mounting.

8. R
emove the nuts which secure
the front flanges of the front
muffler to the downpipe flanges.

9. R
emove the gasket from the front
muffler flange at each side.
R
eposition the front silencer rearwards.
R

emove the gasket from each flange.

10
.
Remove the downpipe catalytic converter.
R
emove the bolts which se
cure the downpipe lower
mounting bracket.
Remove the
downpipe assembly.
11. Remove gasket from the manifold flange.
Clean and inspect th
e manifold joint faces.
Clean and inspect th

e threads
on the downpipe studs.

In
stallation
1.
Fit a ne
w gasket to the mani
fold mating flange on the
downpipe.

2. Fit
the downpipe catalytic converter.
1. Fit the downpipe assembly to the manifold.
Fit,
but do not fully tighten, the mounting bracket securing

bolts. (Leave loose until the nu ts securing the downpipe to
the exhaust manifold are fitted.)
3. Lower the ramp.

4. Tigh te
n the nuts securing the downpipe flange to the manifold
flange.

5. Connec t
the oxygen sensor multiplugs.
Con
n
ect the plug(s) to the respective (previously noted)
sensor(s).
Cor r
ectly position the multiplu
gs on the mounting bracket.

6. Fi
t the coolant header tank.
1. Reposition the tank and fit the securing nuts.
2. Connect the harness connector
7. Refit the centre trim panel and th e left hand enclosure panel to
the engine compartment.

Exha
ust System - Catalyti
c Converter Gasket RH4. 0L NA V8 - AJ27/3.2L
NA V8 - AJ26
Re mo
val and Installation
Remova

l
Installation
1. Op
en the engine compartment and fit paintwork protection
sheets.
2. Remove the front muffler; refer to Operation 30.10.18 in this
section.

3. CAUT
ION: Note the position of the upstream and
downstream (where fitted) o xygen sensor multiplugs for
reassembly.
Disconnect the oxygen sensor multiplugs.
Di spl
ace the multiplugs from the engine mounting bracket.

Dis
connect the plug(s) from the oxygen sensor(s).

4.
Re
move the four nuts which se
cure the downpipe catalytic
converter to the exhaust manifold.
5. Raise the vehicle on a ramp.

6. Re
move the downpipe catalytic converter.
R
e
move the bolts which se
cure the downpipe lower
mounting bracket.
Remove the down
pipe assembly.
7. Remove gasket from the manifold flange.
Clean and inspect th e manif
old joint faces.
Clean and inspect th
e threads on th
e downpipe studs.
1. Fit a new gasket to the mani fold mating flange on the

do
wnpipe.

2. F
it the downpipe catalytic converter.
Fit the down

pipe assemb
ly to the manifold
Fi
t, but do not fully tighten, the mounting bracket securing

bolts. (Leave loose until the nu ts securing the downpipe to
the exhaust manifold are fitted.)
3. Lower the ramp.

4. Tigh
ten the nuts securing the downpipe flange to the manifold
flange..

5. Connec
t the oxygen sensor multiplugs.
Con

nect the plug(s) to the respective (previously noted)
sensor(s).
Cor
rectly position the multiplu
gs on the mounting bracket.
6. Raise the ramp.

7. Tigh
ten the mounting brac
ket securing bolts.
8. Fit the front muffler; refer to Operation 30.10.18.
9. Lower the ramp.


10

.
Remove the paintwork protection sheets and close the engine
cover.

Exha
ust System - Cataly
tic Converter Gasket RH 4.0L SC V8 - AJ26
Remo
val and Installation
Remov
a
l
1.
Op
en the engine compartment and fit paintwork protection
sheets.

2. CAUT
ION: Note the position of the upstream and
downstream (where fitted) o xygen sensor multiplugs for
reassembly.
Disconnect the oxygen sensor multiplugs.
Di spl
ace the multiplugs from the engine mounting bracket.

Dis
connect the plug(s) from the oxygen sensor(s)

3.
Re
move the four nuts which se
cure the downpipe catalytic
converter to the exhaust manifold.
4. Raise the vehicle on a ramp.

5. Re
move the bolts which secure
the rear of the front muffler
assembly to the engine rear mounting.
6. Remove the nuts which secure the front flanges of the front
muffler to the downpipe flanges.

I
nstallation


7.
R
emove the gasket from the front
muffler flange at each side.
R
eposition the front silencer rearwards.
R

emove the gasket from each flange.

8. R
emove the downpipe catalytic converter.
R

emove the bolts which se
cure the downpipe lower
mounting bracket.
Remove the
downpipe assembly.
9. Remove gasket from the manifold flange.
Clean and inspect th
e manifold joint faces.
Clean and inspect th

e threads
on the downpipe studs.
1. Fit a new gasket to the mani fold mating flange on the
downpipe.
2. Fit the downpipe catalytic converter.
1. Fit the downpipe assembly to the manifold.
Fi
t, but do not fully tighten, the mounting bracket securing

bolts. (Leave loose until the nu ts securing the downpipe to
the exhaust manifold are fitted.)

3. Lower the ramp.

4. Tighte
n the nuts securing the downpipe flange to the manifold
flange.

5. Connec t
the oxygen sensor multiplugs.
Con
n
ect the plug(s) to the respective (previously noted)
sensor(s).
Cor r
ectly position the multiplu
gs on the mounting bracket.
6. Raise the vehicle on the ramp.

7. Tigh ten th
e mounting brac
ket securing bolts.
8. Connect the downpipe catalytic converter to the front muffler.
1. Position a new gasket to the flange studs at each side.

Ex
haust System - Front Muffler4.0L
NA V8 - AJ27/3.2L NA V8 - AJ26
Remo
val and Installation
Remov
a
l
Installation
1. Ra
ise the vehicle on a ramp.

2. Move the front muf f
ler forwar
d to allow the intermediate
mufflers to be displaced.
Slac ken t
he clamps (left-hand and right-hand sides),
catalytic converter to front muffler.

3. Slacken the clamps (left-ha nd and right-hand sides),
i
ntermediate mufflers to front muffler.
4. Remove the front muffler.
Di
sconnect the front muffler
from the intermediate
mufflers and then from the downpipe catalytic converters.

5. Clean and inspect al l ex
haust joints.
1. Fit the front muffler.
Fi
t the front muffler fully into the downpipe catalytic
converters and then slide it rearward to engage the
intermediate mufflers.

2. Correctl
y position the front muffl
er in the catalytic converters
to align the correct reference / index indicator ring..
Tigh ten th
e clamps (left-hand
and right-hand sides), front
muffler to catalytic converters.
3. Correctly position the intermedia te mufflers to the front muffler
to align the correct refere nce / index indicator ring.

Ex
haust System - Front Muffler4.0L SC V8 - AJ26
Re
mo
val and Installation
Remov
a
l
Installation
1. Ra
ise the vehicle on a ramp.

2. Separate the front muf f
ler flan
ge joints from the downpipe
catalytic converters.
Slac ken t
he flange nuts (left-hand and right-hand sides),
catalytic converter to front muffler.

3. Slacken the clamps (left-ha nd and right-hand sides),
i
ntermediate mufflers to front muffler.
Move both i
n
termediate mufflers rearwards, as far as
possible.
4. Remove the flange nuts (lef t-hand and right-hand sides),
catalytic converter to front muffler.

5. Re
move the bolts which secure th
e front muffler rear mounting
to the rear of the gearbox.
6. Remove the front muffler.
Di
sconnect the front muffler fr
om each downpipe flange.
Di
sconnect the front muffler
from the intermediate
mufflers and remove it.
7. Remove the gasket from each front flange joint.
8. Clean and inspect al l exhaust joints.
1. Fit the front muffler.

F
it the front muffler fully into
the intermediate mufflers.

2. Con
nect the front muffler flanges to the catalytic converters.
F

it a new gasket to each flange.
Con

nect the front muffler flanges to the catalytic
converters; move the front muffler / intermediate
mufflers assembly forwards.
Tigh
ten the flange nuts (left-hand and right-hand sides),
front muffler to catalytic converters.

3. F
it the bolts which secure the front muffler rear mounting to
the rear of the gearbox.

4. Re
position the intermediate mu
fflers to the front muffler to
align the correct referenc e / index indicator ring.
Ti
ghten the clamps (left-han
d and right-hand sides),
intermediate mufflers to front muffler.
5. Lower the ramp.