12.65 JAGUAR X308 1998 2.G Manual PDF

15. Loosen the bolt which secures the VVT unit.
Do not tamper with the three bolts which secure the VVT
mechanism to the sprockets. It is sealed at the factory to
the correct valve timing specif ication for the engine and is
supplied only as a complete unit.
16. Remove the primary chain tens ioner. Refer to operation
12.65.55, in this Section.

17. Remove the primary ch ain tensioner blade.
1. Remove the pivot bolt which secures the tensioner blade.
2. Remove the tensioner blade.
18. Reposition the VVT unit along the cam journal to allow the
chain to clear the head casting.
Disconnect the primary chain from the VVT unit and
reposition it against the crankshaft sprocket.

19. Remove the VVT unit.
1. Remove the securing bolt from the VVT unit and the exhaust cam sprocket.
2. Remove the VVT unit, exhaust sprocket and secondary chain as an asse mbly (release the chain
from the tensioner which is still secured to the
cylinder head).
Remove the secondary chain from the VVT unit and the
sprocket.

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

6. Refit the primary chain tensione r assembly. Refer to Operation
12.65.55 in this Section.
Use 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.

7. Tighten the exhaust camshaft sprocket securing bolt.
1. Fit 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 sprock et securing bolt to 115 -
125 Nm.

8. 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 115 - 125 Nm.
Remove the chain tensioning tool and the wedge(s).
9. Remove the camshaft locking tool 303 - 530 .
10. Raise the vehicle on the ramp.
11. Remove the crankshaft setting tool 303 - 531.
12. 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.
13. Lower the ramp.
14. Refit the B-Bank VVT Bush Carrier Assembly. Refer to
operation 12.65.52 in this Section.
15. Refit the Timing Cover. Refer to Operation 12.65.01 in this
Section.
16. Move the engine compartment cover from the service position
and connect the gas struts.
17. Remove the paint protection sheets and close the cover.
18. Connect the battery and fit the battery cover.
Refer to the Battery Reconnection Procedure 86.15.15.

Engine - Variable Camshaft Timing Oil Control Unit RH
In-vehicle Repair
Removal
Special Tool(s)

Camshaft setting
303-530

Timing chain tensioning
303-532

Wedges, primary chain
303-533

Crankshaft 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. Disconnect the batt ery ground cable.
Remove the battery cover.
4. Remove the Timing Co ver. Refer to Operation 12.65.01 in this
Section.
5. Remove the Variable Valve Ti ming Bush Carrier Assembly.
Refer to Operation 12.65.51 in this Section
6. Raise the vehicle on a ramp.
7. Remove the crankshaft position sensor.

1. Remove the bolt which secures the crankshaft position sensor to the flywheel housing.
Remove the sensor and allow it to hang free under the
engine.
2. Remove the access grommet (for torque converter bolts) from the housing.
8. Fit the damper securing bolt (old one) to the crankshaft, hand-
tight only.

9. 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.

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

13. Fit the camshaft locking tool 303 - 530 to the A-Bank
camshafts, aligning the shafts slightly as necessary.
14. Remove the primary chain tens ioner. Refer to operation
12.65.54, in this Section

3. Fit the chain tensioning tool 303 - 532 to the exhaust camshaft
sprocket.
Reposition the sprocket (and the VVT unit) for the most
advantageous position for use of the tool.
Remove the tool.

4. Refit 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.
2. The VVT unit must not be rotated on the camshaft

5. 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.
6. Refit the primary chain tensione r assembly. Refer to Operation
12.65.54 in this Section.
Use 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.

7. Tighten the exhaust camshaft sprocket securing bolt.
1. Fit 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 sprock et securing bolt to 115 -
125 Nm.

8. 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 115 - 125 Nm.
Remove the chain tensioning tool and the wedge(s).
9. Remove the camshaft locking tool 303 - 530.
10. Raise the vehicle on the ramp.
11. Remove the crankshaft setting tool 303 - 531.

12. 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.
13. Lower the ramp.
14. Refit the A-Bank VVT Bush Carrier Assembly. Refer to
operation 12.65.51 in this Section.
15. Refit the Timing Cover. Refer to Operation 12.65.01 in this
Section.

Engine - Variable Camshaft Timing Oil Control Unit Housing LH
In-vehicle Repair
Removal
Installation
1. Open the engine compartment and fit paintwork protection
sheets.
2. Set the engine compartment cover to the service access
position.

3. Disconnect the batt ery ground cable.
Remove the battery cover.
4. Remove the Timing Co ver. Refer to Operation 12.65.01 in this
Section.

5. Remove 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.

6. Remove 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. Clean and inspect all relevant components.
1. Fit new seals to the bush carrier.
1. Fit the new sealing ring (scarf jointed) to the carrier bush groove.
2. Fit a new O-ring to the carrier oil-way.

2. Fit the bush carrier to the cylinder block.
Lubricate the seal (scarf jointed) and the bush.
1. Fit the bush carrier assembly.
Check that the seals are in pl ace and that the ring dowels
are engaged squarely. Fully locate the assembly as much
as possible by hand pressure.
2. Fit the two securing bolts and one nut. Tighten to 19- 23 Nm.
3. Refit the Timing Cover. Refer to Operation 12.65.01 in this
Section.
4. Move the engine compartment co ver from the service position
and connect the gas struts.
5. Remove the paint protection sheets and close the cover.
6. Connect the battery and fit the battery cover.
Refer to the Battery Reconnection Procedure 86.15.15.

V
ariable Camshaft Timing Oil Control Unit Housing RH
12.65.51
Removal
1. Open the engine compartment and fit paintwork protection sheets.
2. Set the engine compartment cover to the service access position.
3
. Disconnect the battery ground cable.
Remove the battery cover.
4. Remove the Timing Cover. Refer to Operation <<12.65.01>>
in this Section.
5
. Remove the VVT bush carrier.
1. Remove the three bolts which secure the carrier to the cylinder block.