1998 JAGUAR X308 lock

Re
position the sprocket (and the VVT unit) for the most advantageous
position for use of the tool.
R
emove the tool.

25
.
Install the primary timing chain.
R
eposition the VVT unit forwards on the cam journal (do not rotate it)
to allow the chain to cl ear the head casting. Disconnect the primary
chain from the Ty-strap.
1. Install the primary chain to position over the crankshaft sprocket and the VVT unit sprocket. There mu st be no slack on the drive
side of the primary chain and the VVT unit must not be rotated on
the camshaft.

26
.
Install the primary chain tensioner blade.
1. Position the tensioner blade to the cylinder block.
2. Install the retaining / pivot bolt and tighten it to 14 Nm.

27
.
Push the primary chain tensioner piston into the body to provide clearance
for installing.
1. Insert a thin rigid wire through the hole in the end of the tensioner
piston to displace the ball from the non-return valve seat.
2. With the wire in position, press the piston fully into the tensioner body.
Re
move the wire.

28
.
Assemble the tensioner.
1. Install the two mounting bolts to the tensioner.
2. Locate the tensioner back-plate to the two bolts.
29. Install the tensioner to the cylinder block.
1. Position and align the tensioner to the cylinder block and to the mating slot on the rear face of the tensioner blade.
2. Install and tighten the two bolts to 12 Nm.

30. U
se a wedge 303 - 533 (or two if required) between the primary chain
tensioner and tensioner blade, to ta ke up the slack in the chain, for
tightening the VVT unit and exhaust camshaft sprocket.

31 . C
AUTION: Make sure that a new bolt is installed.
Tighten the exhaust camshaft sprocket securing bolt. 1. Install the chain tensioner tool 303 - 532 to the sprocket holes.
Apply
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 sprocket securing bolt to 20 Nm +90°.

32 . C
AUTION: Make sure that a new bolt is installed.
Tighten 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 20Nm +90°.
Re
move the chain tensioning tool and the wedge(s).
33
. R
emove the camshaft locking tool 303 - 530.
34. Raise the vehicle on the ramp.
35. Remove the crankshaft setting tool 303 - 531.

36 . In
stall the crankshaft position sensor.
1. Install the sensor to the flywheel housing and install the securing bolt. Tighten to 10 Nm.
2. Install the access grommet to the housing.
37. Lower the ramp.
38. Install and tighten the nuts which secure the exhaust manifold to the

d
ownpipe catalyst.

39
.
Install new seals to the B-Bank VVT bush carrier.
1. Install the new sealing ring (scarf jointed) to the carrier bush groove.
2. Install a new O-ring to the carrier oil-way.

40
.
Install the bush carrier to the cylinder block.
Lu
bricate the seal (scarf
jointed) and the bush.
1. Install the bush carrier assembly.
Chec
k that the seals are
in place and that the ri ng dowels are engaged
squarely. Fully locate the assembly as much as possible by hand
pressure.
2. Install the two securing bolts and one nut. Tighten to 21 Nm.
41. Install new sealing rings to the coolant outlet pipe grooves.

42
.
Install the coolant outlet pipe.
1. Install the outlet pipe to the bypass hose and to the cylinder heads.
2. Install the four bolts which secure the outlet pipe.

43
.
Connect the hoses and multi-plug to the coolant outlet pipe.
1. Connect the heater hose and reposition the hose clip.
2. Connect the multi-plug to the temperature sensor.
3. Expand and reposition the hose clip along the bypass hose.
44. Install the Inlet Manifold. Refer to Operation 30.15.01 in this Section. This
operation includes installing the throttle housing.
45. Install the engine front cover.For additional information, refer to: Engine
Front Cover (303-01 Engi
ne, In-vehicle Repair).

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.

• N
OTE: Remove the sensor and allow it to hang free under the engine.

1

. Remove the bolt which secures the crankshaft position sensor to
the flywheel housing.
2. Remove the access grommet (for torque converter bolts) from the housing.
14. Install the damper securing bolt (old one) to the crankshaft, hand-tight
only.

15
.
Rotate the crankshaft until the triangular arrow indent on the drive plate is
visible through the access hole; confirm that the timing flat on each
camshaft is uppermost.

16
.
Install the crankshaft setting peg 3 03 - 531 to the crankshaft position
sensor location.
1. Install the crankshaft setting peg 303 - 531.
Position
the crankshaft so that the setting peg engages fully into the
timing slot.
2. Install and tighten the bolt to secure the setting peg.
17. Remove the damper securing bolt from the crankshaft.
18. Lower the vehicle on the ramp.

19
.
Install the camshaft locking tool 303 - 530 to the A-Bank camshafts,
aligning the shafts slightly as necessary.

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

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. Remove the primary chain from the VVT unit and from the crankshaft
pulley.

27 . R
emove 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.
28. Remove the secondary chain tensioner.

Installation

hea
d.
3. With assistance, remove the cylinder head.

34 . R
emove the cylinder head gasket.
1. Note how the gasket is installed and remove it.
2. Remove and discard the cloth, placed previously to absorb coolant spillage.
Wipe up any l e
aked coolant.
35. Remove the coolant drain tray from under the engine.
36. Remove and discard the gasket from the downpipe catalyst.
Cle
an the gasket faces of the catalyst and the exhaust manifold.
37. Clean cylinder head and cylinder block gasket faces.
Ensu
re 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.
38. 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.
4. For cylinder head face distortion data, refer to specifications.For additional
information, refer to: Specifications
(303
-00 Engine System - General
Information, Specifications).

5.

NOTE: For
cylinder head with
distortion above the
maximum allowance,
the cylinder head
material must be
measured.
Measure the
cylinder head
material.
Che
ck
measurement
from the
centre of the
exhaust
dowel to the
cylinder head
face as
shown.
If the

measurement
is less than
51.88 mm
the cylinder
head requires
replacement.

6.
Install a new gasket to the downpipe catalyst flange.
7. Install and align a new cylinder head gasket to the cylinder block face.