1998 JAGUAR X308 exhaust

2. Fi
t the retaining / pivot bolt and tighten it to 12 - 16
Nm.

5. Refi
t the primary chain tensione
r assembly. Refer to Operation
12.65.55 in this Section.
U s
e a wedge 303 - 533 (or two if required) between the
primary chain tensioner and te nsioner blade, to take up
the slack in the chain.

6. Tigh te
n the exhaust camshaft
sprocket securing bolt.
1. Fit the chain tensioner tool 303 - 532 to the sprocket holes.
1. Apply force to the to
ol in
an anti-clockwise direction
to tension the chain on its drive side.
2 .
Whilst applying the opposing force to the sprocket
and chain, tighten the sprock et securing bolt to 115 -
125 Nm.

7. Tigh te
n the VVT unit securing bolt.
1. Whilst still applying the opposing force to the
sprocket and chain (using 303 - 532), check that the
wedges are still in place, tighten the VVT unit
securing bolt to 115 - 125 Nm.
Re
move the chain tensioning
tool and the wedge(s).
8. Remove the camshaft locking tool 303 - 530 and transfer it to
the A-Bank camshafts, aligning the shafts slightly as necessary.

9. F
it the chain tensioning tool 303 - 532 to the exhaust camshaft
sprocket, A-Bank.
Re
position the sprocket (and
the VVT unit) for the most
advantageous position for use of the tool.
R
emove the tool.

10
.
Refit the primary timing chain, A-Bank.
1. Fit the primary chain over the crankshaft sprocket and the VVT unit sprocket. There must be no slack on
the drive side of the primary chain and the VVT unit
must not be rotate d on the camshaft.

11
.
Fit the primary chain tensioner blade.
1. Position the tensioner blade to the cylinder block.
2. Fit the retaining / pivot bolt and tighten it to 12 - 16 Nm.
12. Refit the primary chain tens ioner assembly. Refer to
Operation 12.65.54 in this Section.
U
se a wedge 303 - 533 (or two if required) between the
primary chain tensioner and te nsioner blade, to take up
the slack in the chain.

13. Tigh
ten the exhaust camshaft
sprocket securing bolt.
1. Fit the chain tensioner tool 303 - 532 to the sprocket holes.
1. Apply force to the to
ol in
an anti-clockwise direction
to tension the chain on its drive side.
2 .
Whilst applying the opposing force to the sprocket
and chain, tighten the sprock et securing bolt to 115 -
125 Nm.

14 . Tigh
ten the VVT unit securing bolt.
1. Whilst still applying the opposing force to the
sprocket and chain (using 303 - 532), check that the
wedges are still in place, tighten the VVT unit
securing bolt to 115 - 125 Nm.
R e
move the chain tensioning
tool and the wedge(s).
15. Remove the camshaft locking tool 303 - 530.
16. Raise the vehicle on the ramp.
17. Remove the crankshaft setting tool 303 - 531.

18 . R
efit the crankshaft position sensor.
1. Fit the sensor to the fl ywheel housing and fit the
securing bolt. Tighten to 8 - 12 Nm.
2. Refit the access grommet to the housing.
19. Lower the ramp.
20. Fit new seals to the VVT bush carrier, A-Bank.
1. Fit the new sealing ring ( scarf jointed) to the carrier
bush groove.

Remove the
sensor and allow
it to hang free under the
engine.
2. Remove the access grommet (for torque converter bolts) from the housing.
7. Install the damper securing bolt (old one) to the crankshaft,
hand-tight only.

8. R
otate the crankshaft until the triangular arrow indent on
the drive plate is visible thro ugh the access hole; confirm
that the timing flat on ea ch camshaft is uppermost.

9. Inst
all the crankshaft setting peg 303-531 to the crankshaft
position sensor location.
1. Install the crankshaft setting peg 303-531.
Position the crankshaft so that the settin
g peg engages
fully into the timing slot.
2. Install and tighten the bolt to secure the setting peg.
10. Remove the damper securing bolt from the crankshaft.
11. Lower the vehicle on the ramp.

12
.
Install the camshaft locking tool 303-530 to Bank 1
camshafts, aligning the shafts slightly as necessary.
13. Loosen the bolt which secures the sprocket to the exhaust
camshaft.

18
.
Remove the chain from the cams haft sprocket and from the
crankshaft sprocket.

19
.
Remove the camshaft locking tool 303-530 and transfer it to
Bank 2 camshafts, aligning the shafts slightly as necessary.

20
.
Loosen the bolt which secures the sprocket to the exhaust
camshaft.

21
.
Loosen the bolt which secures the sprocket to the intake
camshaft.
22. Remove the primary ch ain tensioner bolts.

I
nstallation

28
.
Clean and inspect all relevant components.

1. F
it the sprockets to the crankshaft.
The teeth

of Bank 1 and Bank 2 sprockets on the
crankshaft must be out of phas e with each other. If they
are in-phase after fitting, remove the Bank 1 sprocket,
turn it on its vertical axis and refit it.

2. Inst
all the chain tensioning
tool 303-532 to the exhaust
camshaft sprocket, Bank 2.
Re
position the sprocket to the most advantageous position

for use of the tool.
R
emove the tool.

3. Install th
e primary timi
ng chain, Bank 2.
1. Install the primary chain over the crankshaft sprocket and the intake camshaft sp rocket. There must be no
slack on the drive side of the primary chain and the
sprockets should not be rotated on the camshafts (or
the tensioning tool may not fit).
Sli
de the camshaft sprocket
s fully rearwards onto the
respective camshafts.
4. Install the primary ch ain tensioner blade.
1. Position the tensioner blade to the cylinder block.

2.
Install the retaining / pivo
t bolt and tighten it to 12-
16 Nm.

5. Install the primary ch
ain te
nsioner assembly. Refer to
Operation 12.65.55.
Use a wedge 3 03-5
33 (or two if required) between the
primary chain tensioner and te nsioner blade, to take up
the slack in the chain.

6. Tigh te
n the exhaust camshaft
sprocket securing bolt.
1. Install the chain tensioner tool 303-532 to the sprocket holes.
Appl y force
to the tool in an
anti-clockwise direction to
tension the chain on its drive side.
2. Whilst applying the opposing force to the sprocket and chain, tighten the sprock et securing bolt to 115-
125 Nm.

7. Tigh te
n the intake camshaft
sprocket securing bolt.
1. Whilst still applying the opposing force to the
sprocket and chain (using 303-532), check that the
wedges are still in place, ti ghten the securing bolt to
115-125 Nm.
R e
move the chain tensioning
tool and the wedge(s).
8. Remove the camshaft locking t ool 303-530 and transfer it to
Bank 1 camshafts, aligning the shafts slightly as necessary.

9. Inst
all the chain tensioning
tool 303-532 to the exhaust
camshaft sprocket, Bank 1.
Re
position the sprockets to the most advantageous
position for use of the tool.
R
emove the tool.

10
.
Install the primary timi ng chain, Bank 1.
1. Install the primary chain over the crankshaft sprocket and the intake camshaft sp rocket. There must be no
slack on the drive side of the primary chain and the
sprockets should not be rotated on the camshafts (or
the tensioning tool may not fit).

11
.
Install the primary ch ain tensioner blade.
1. Position the tensioner blade to the cylinder block.
2. Install the retaining / pivo t bolt and tighten it to 12-
16 Nm.
12. Install the primary chain te nsioner assembly. Refer to
Operation 12.65.54.
Use a wedge 3
03-533 (or two if required) between the
primary chain tensioner and te nsioner blade, to take up
the slack in the chain.