1998 JAGUAR X308 lock

Reposition the sprocket (and the VVT unit) for the most
advantageous position for use of the tool.
Remove the tool.

3. 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 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.
Use a wedge 303 - 533 (or two if required) between the
primary chain tensioner and tensioner blade, to take up
the slack in the chain.
6. 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 sprocket securing bolt to 115 -
125 Nm.

7. 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).
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.
2. Fit a new O-ring to the carrier oil-way.
14. Fit the VVT bush carrier to the cylinder block.

Installation



2. Remove the tensioner blade.
10. Clean and inspect all relevant components.

1. Fit the 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.
2. Remove the Tie-Stra p from the chain.
3. Refit the Timing Chain Tensioner - Primary. The camshafts may
need to be turned slightly to pr ovide slack in the chain, on the
tensioner side. Refer to Operation 12.65.55 in this Section.
4. Refit the VVT Bush Carrier As sembly. Refer to Operation
12.65.52 in this Section.
5. Refit the Timing Cover. Refer to Operation 12.65.01 in this
Section.
6. Move the engine compartment co ver from the service position
and connect the gas struts.
7. Remove the paint protection sheets and close the cover.
8. Connect the battery and fit the battery cover.
Refer to the Battery Reconnection Procedure 86.15.15.

Installation



from the upper retaining pin.
10. Clean and inspect all relevant components.

1. Fit the chain guide.
The chain guide must be fitted so that the slotted hole is
towards the top, and the raised shoulder to the cylinder
block.
1. Fit the chain guide to the block and locate it onto the upper retaining pin.
2. Fit the retaining bolt an d tighten it to 10-14 Nm.
2. Remove the Tie-Stra p from the chain.
3. Refit the Timing Chain Tensioner - Primary. The camshafts may
need to be turned slightly to pr ovide slack in the chain, on the
tensioner side. Refer to Operation 12.65.54 in this Section.
4. Refit the VVT Bush Carrier As sembly. Refer to Operation
12.65.51 in this Section.
5. Refit the Timing Cover. Refer to Operation 12.65.01 in this
Section.
6. Move the engine compartment co ver from the service position
and connect the gas struts.
7. Remove the paint protection sheets and close the cover.
8. Connect the battery and fit the battery cover.
Refer to the Battery Reconnection Procedure 86.15.15.

Installation



from the upper retaining pin.
10. Clean and inspect all relevant components.

1. Fit the chain guide.
The chain guide must be fitted so that the slotted hole is
towards the top, and the raised shoulder to the cylinder
block.
1. Fit the chain guide to the block and locate it onto the upper retaining pin.
2. Fit the retaining bolt an d tighten it to 10-14 Nm.
2. Remove the Tie-Stra p from the chain.
3. Refit the Timing Chain Tensioner - Primary. The camshafts may
need to be turned slightly to pr ovide slack in the chain, on the
tensioner side. Refer to Operation 12.65.55 in this Section.
4. Refit the VVT Bush Carrier As sembly. Refer to Operation
12.65.52 in this Section.
5. Refit the Timing Cover. Refer to Operation 12.65.01 in this
Section.
6. Move the engine compartment co ver from the service position
and connect the gas struts.
7. Remove the paint protection sheets and close the cover.
8. Connect the battery and fit the battery cover.
Refer to the Battery Reconnection Procedure 86.15.15.

Installation



2. Remove the tensioner blade.
10. Clean and inspect all relevant components.

1. Fit the 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.
2. Remove the Tie-Stra p from the chain.
3. Refit the Timing Chain Tensioner - Primary. The camshafts may
need to be turned slightly to pr ovide slack in the chain, on the
tensioner side. Refer to Operation 12.65.54 in this Section.
4. Refit the VVT Bush Carrier As sembly. Refer to Operation
12.65.51 in this Section.
5. Refit the Timing Cover. Refer to Operation 12.65.01 in this
Section.
6. Move the engine compartment co ver from the service position
and connect the gas struts.
7. Remove the paint protection sheets and close the cover.
8. Connect the battery and fit the battery cover.
Refer to the Battery Reconnection Procedure 86.15.15.

2. With the wire in position, press the piston fully into the tensioner body.
Remove the wire.

2. Assemble the tensioner.
1. Fit the two mounting bolts to the tensioner.
2. Locate the tensioner back-plate to the two bolts.

3. Fit 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. Fit and tighten the two bolts to 10-14 Nm.
4. Refit the Timing Cover. Refer to Operation 12.65.01 in this
Section.
5. Move the engine compartment co ver from the service position
and connect the gas struts.
6. Remove the paint protection sheets and close the cover.
7. Connect the battery and fit the battery cover.
Refer to the Battery Reconnection Procedure 86.15.15.

2. With the wire in position, press the piston fully into the tensioner body.
Remove the wire.

2. Assemble the tensioner.
1. Fit the two mounting bolts to the tensioner.
2. Locate the tensioner back-plate to the two bolts.

3. Fit 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. Fit and tighten the two bolts to 10-14 Nm.
4. Refit the Timing Cover. Refer to Operation 12.65.01 in this
Section.
5. Move the engine compartment co ver from the service position
and connect the gas struts.
6. Remove the paint protection sheets and close the cover.
7. Connect the battery and fit the battery cover.
Refer to the Battery Reconnection Procedure 86.15.15.