exhaust JAGUAR X308 1998 2.G Owner's Manual

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.

13. Tigh
ten 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.

14 .
Tigh
ten 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).
15. Remove the camshaft locking tool 303-530.
16. Raise the vehicle on the ramp.
17. Remove the crankshaft setting tool 303-531.

18 . Inst
all the crankshaft position sensor.
1. Install the sensor to the flywheel housing and install
the securing bolt. Tighten to 6-8 Nm.
2. Install the access grommet to the housing.
19. Lower the ramp.
20. Install the Timing Cover. Refer to Operation 12.65.01.
21. Move the engine compartment cover from the service position
and connect the gas struts.
22. Remove the paint protection sheets and close the cover.

The
teeth of the A-Bank and the B-Bank sprockets on the
crankshaft must be out of phas e with each other. If they
are in-phase after fitting, remo ve the sprocket, turn it on
its vertical axis and refit it.

2. Fi
t the chain tensioning tool 303 - 532 to the exhaust camshaft
sprocket.
Re po
sition the sprocket (and
the VVT unit) for the most
advantageous position for use of the tool.
R e
move the tool.

3. Re
fit the primary timing chain.
1. Fit the primary chain to position 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 rotated on the camshaft.

4. 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.
5. Refit the primary chain tensione r assembly. Refer to Operation
12.65.54 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
ten the exhaust camshaft
sprocket securing bolt.
1. Fit 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
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
emove the chain tensioning
tool and the wedge(s).
8. Remove the camshaft locking tool 303 - 530.
9. Raise the vehicle on the ramp.
10. Remove the crankshaft setting tool 303 - 531.

11
.
Refit 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.
12. Lower the ramp.
13. Fit new seals to the VVT bush carrier.
1. Fit the new sealing ring (scarf jointed) to the carrier bush groove.

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.

21. L
oosen the bolt which secures the VVT unit to the camshaft.
22. Remove the camshaft locking tool 303 - 530 (installed for previous
operation).

23 . R
emove the primary chain tensioner bolts.

24 . R
emove the tensioner assembly.
1. Remove the tensioner.
2. Remove the tens ioner back-plate.

25 . R
emove the primary chain tensioner blade.
1. Remove the pivot bolt which secures the tensioner blade.
2. Remove the tensioner blade.
26. Reposition the VVT unit along the cam journal to allow the chain to clear
the head casting.
Di s
connect the primary chain from the VVT unit and secure it to the
bypass hose retaining clip, using a Ty-strap.
27. Remove the VVT unit and exhaust camshaft sprocket.
1. Remove the securing bolt from both the VVT unit and the exhaust cam sprocket.
2. Remove the VVT unit, exhaust sprocket and secondary chain as an assembly (release the chain from the tensioner which is still
secured to the cylinder head).
Re
move the secondary chain from
the VVT unit and the sprocket.

Inst
allation
Cl
ean the gasket faces of the catalyst and the exhaust manifold.
38. Clean cylinder head and cylinder block gasket faces.
E
nsure that all threaded holes in the cylinder block face are clean and
free from oil.
Cl
ean and inspect the cylinder head bolts. They may be re-used on two
occasions. When re- used, each bolt head should be marked with one
dot from an automatic centre punch.
39. Clean and inspect all relevant components and mating faces.

1.
CAUTIONS:
If a replacement cylinder head is to be installed to a vehicle with VCT
the cylinder head must have the oil gallery blind rivet removed before
installation.
Make sure that all debris is removed from the cylinder head and cylinder
head oil gallery.
Vehicles fitted with VCT: Remove the blind rivet from the VCT oil gallary.
• NOTE: The centre bore of the blind rivet is 6 mm diameter.
I
dentify the VCT oil supply gallery and the 8 mm blind rivet.
U

sing a suitable 3 mm punch release the centre of the blind rivet until
it is released from the outer part of the blind rivet.
U
sing a suitable extraction tool, remo
ve the remaining part of the blind
rivet.
2.
Clean the component mating faces.

3.
Check cylinder head face for distortio
n, across the center and from corner
to corner.