1998 JAGUAR X308 bank 1

En
gine - Valve Clea
rance Adjustment
Gene
ral Procedures
S
p
ecial Tool(s)

Tappet adjustment
3
03-
540

Ai
r gun, fan nozzl
e
303-590
1. Open the engine compartment and fit paintwork protection
sheets. Open to the service position.
2. Carefully remove both engine covers, taking care not to
damage the plasti c fixings or the rubber inserts.

3. Disc
onnect the batt
ery ground cable.
Re
move the battery cover.
4. Remove the cam cover from the 'A' bank and the 'B' bank;
including the purge valve, the on-plug ignition coils and the air
intake tube / air flow meter / air cleaner cover assembly. Refer
to Operations 12.29.43 and 12.29.44.
5. Check, and note the valve cleara nces, as described earlier in
this section.
6. Use a rag to wipe up as much oil as possible from the tappet
wells.
7. Valve adjustment involves considerable repetition. A SUMMARY
OF THE PROCEDURE follows:
1. Fit the adjusting tool base plate to one cylinder head.
2. Rotate the crankshaft to position four valves ready for
adjustment.
3. Use the attachment part of the special tool to adjust two valve clearances. Transfer the attachment and
adjust the other two valve clearances.
4. Remove the attachment pa rt from the adjusting tool
base plate.

E
ngine - Valve Clearance Check
Gen
eral Procedures

1.
Open the engine compartment and fit paintwork protection
sheets. Open to the service position.
2. Carefully remove both engine covers, taking care not to
damage the plasti c fixings or the rubber inserts.

3. Di
sconnect the batt
ery ground cable.
R
emove the battery cover.
4. Remove the cam cover from the 'A' bank and the 'B' bank;
including the purge valve, the on-plug ignition coils and the air
intake tube / air flow meter / air cleaner cover assembly. Refer
to Operations 12.29.43 and 12.29.44.
5. Rotate the crankshaft so that there are four valves which are
'off the cam' (cam lobes upperm ost), so that their clearance
may be measured.
6. Measure the gap on each of the four valves. Note which valve
has been measured, along with its relevant clearance.
7. Rotate the crankshaft a small am ount so that the next four
valves are 'off the cam'. Measure and note the clearances.
Re
peat this step
a further six times, until all valve
clearances have been measured and noted.
8. Refit the cam covers and associated components. Refer to
Operations 12.29.43 and 12.29.44.
9. Refit the engine covers.
10. Move the engine compartment cover from the service position
and connect the gas struts.
11. Remove the paint protection sheets and close the cover.
12. Connect the battery and fit the battery cover.
Re
fer to the Battery Reconnection Procedure 86.15.15

Engine - Crankshaft
Inner Sp
rocket4.0L NA V8 - AJ27
In-v
ehicle Repair
Remov

al
S
pecial Tool(s)

Camshaft setting
3

03 - 530

T

iming chain tensioning
303 - 532

Wedges, primary ch
ain
303 - 533

Cranksh
aft setting
303 - 531
1. Open the engine compartment and fit paintwork protection
sheets.
2. Set the engine compartment cover to the service access
position.

3. Di
sconnect the batt
ery ground cable.
R
emove the battery cover.
4. Remove the Timing Co ver. Refer to Operation 12.65.01 in this
Section.
5. Remove the VVT bush carrier from the A-Bank.
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.

6. Re
move 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.

7. Re
move the VVT bush carrier from the B-Bank.
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.

8. Re
move 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.
9. Raise the vehicle on a ramp.
10. Remove the crankshaft position sensor.
1. Remove the bolt which secures the crankshaft position sensor to the flywheel housing.
1. Re move
the sensor and allow it to hang free under
the engine.

2
. Remove the access grommet (for torque converter
bolts) from the housing.
11. Fit the damper securing bolt (old one) to the crankshaft,
hand-tight only.

12
.
Rotate 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.

13
.
Fit the crankshaft setting peg 303 - 531 to the crankshaft
position sensor location.
1. Fit the crankshaft setting peg 303 - 531.
1. P
osition the crankshaft so that the setting peg
engages fully into the timing slot.
2
. Fit and tighten the bolt to secure the setting peg.
14. Remove the damper securing bolt from the crankshaft.
15. Lower the vehicle on the ramp.

16
.
Fit the camshaft locking tool 303 - 530 to the A-Bank
camshafts, aligning the shafts slightly as necessary.
17. Loosen the bolt which secures the sprocket to the camshaft.

22
.
Remove the chain from the VVT unit and from the crankshaft
pulley.

23
.
Remove the camshaft locking tool 303 - 530 and transfer it to
the B-Bank camshafts, aligning the shafts slightly as necessary.


24
.
Loosen the bolt which secures the sprocket to the camshaft.

25
.
Loosen the bolt which secures the VVT unit to the camshaft.
26. Remove the primary ch ain tensioner bolts.

27. R
emove the tensioner assembly.
1. Remove the tensioner.
2. Remove the tensioner back-plate.

28. R
emove the chain tensioner blade.
1. Remove the pivot bolt which secures the tensioner blade.
2. Remove the tensioner blade.
29. Reposition the VVT unit and exhaust camshaft sprocket
forward along the camshaft bosses and remove the chain from
the VVT unit and from th e crankshaft sprocket.

30 . R
emove the sprocket from the
crankshaft. To remove the B-
Bank sprocket, the A-Bank spro cket must be removed first.
31. Note the orientation of the spro cket relative to the sprocket
for the B-Bank drive (half a toot h out of line) and remove the
sprocket.

I
nstallation

32
.
Clean and inspect all relevant components.

1. F
it the sprockets to the crankshaft.
Th

e 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, remove the A-Bank sprocket,
turn it on its vertical axis and refit it.

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

3. R
efit the primary timing chain, B-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.
Sl
ide the VVT and exhaust sprocket fully rearwards onto
the respective camshafts.
4. Fit the primary chain tensioner blade.
1. Position the tensioner blade to the cylinder block.