1998 JAGUAR X308 chain

18. Loosen the bolt which secures the VVT unit to the camshaft.

19. Remove the primary ch ain tensioner bolts.

20. Remove the tensioner assembly.
1. Remove the tensioner.
2. Remove the tensioner back-plate.
21. Remove the chain tensioner blade.
1. Remove the pivot bolt which secures the tensioner blade.
2. Remove the tensioner blade.

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.

Installation


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

28. Remove 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. Note the orientation of the spro ckets relative to each other
(half a tooth out of line).
31. Clean and inspect all relevant components.
1. Fit the chain tensioning tool 303 - 532 to the exhaust camshaft

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

2. Refit 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.
Slide the VVT and exhaust sprocket fully rearwards onto
the respective camshafts.

3. 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.

4. 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.
5. Tighten the exhaust camshaft sprocket securing bolt.
1. Fit the chain tensioner tool 303 - 532 to the sprocket holes.
1. 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.

6. 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).

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

8. Fit the chain tensioning tool 303 - 532 to the exhaust camshaft
sprocket, A-Bank.
Reposition the sprocket (and the VVT unit) for the most
advantageous position for use of the tool.
Remove the tool.
9. Refit the primary timing chain, A-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.

10. 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.

11. Refit the primary chain tens ioner 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.

12. Tighten the exhaust camshaft sprocket securing bolt.
1. Fit the chain tensioner tool 303 - 532 to the sprocket holes.
1. 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.
13. 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).

Engine - Primary Timing Chain LH4.0L SC V8 - AJ26/3.2L NA V8 - AJ26,
3.2L/4.0L
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 Cover. Re fer to Operation 12.65.01.
5. Raise the vehicle on a ramp.
6. Remove the crankshaft position sensor.
1. Remove the bolt which secures the crankshaft

14. Loosen the bolt which secures the sprocket to the intake
camshaft.

15. Remove the primary ch ain tensioner bolts.

16. Remove the tensioner assembly.
1. Remove the tensioner.
2. Remove the tensioner back-plate.
17. Remove the chain tensioner blade.
1. Remove the pivot bolt which secures the tensioner blade.
2. Remove the tensioner blade.