1998 JAGUAR X308 ECU

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.

18. Remove the chain from the cams haft sprocket and from the
crankshaft sprocket.

19. Remove the camshaft locking tool 303-530 and transfer it to
Bank 2 camshafts, aligning the shafts slightly as necessary.

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

21. Loosen the bolt which secures the sprocket to the intake
camshaft.
22. Remove the primary ch ain tensioner bolts.

Installation


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

24. Remove the chain tensioner blade.
1. Remove the pivot bolt which secures the tensioner blade.
2. Remove the tensioner blade.
25. Reposition both camshaft sprockets forward along the
camshaft bosses and remove the chain from the intake
camshaft sprocket and from the crankshaft sprocket.

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

camshaft sprocket, Bank 2.
Reposition the sprocket to the most advantageous position for use of the tool.
Remove the tool.

2. Install the primary timi ng chain, Bank 2.
1. Install the primary chain over the crankshaft sprocket and the intake camshaft sp rocket. There must be no
slack on the drive side of the primary chain and the
sprockets should not be rotated on the camshafts (or
the tensioning tool may not fit).
Slide the camshaft sprocket s fully rearwards onto the
respective camshafts.

3. Install the primary ch ain tensioner blade.
1. Position the tensioner blade to the cylinder block.
2. Install the retaining / pivo t bolt and tighten it to 12-
16 Nm.

4. Install the primary chain te nsioner assembly. Refer to
Operation 12.65.55.
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. 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 sprock et securing bolt to 115-
125 Nm.

6. Tighten the intake camshaft sprocket 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, ti ghten the securing bolt to
115-125 Nm.
Remove the chain tensioning tool and the wedge(s).

7. Remove the camshaft locking t ool 303-530 and transfer it to
Bank 1 camshafts, aligning the shafts slightly as necessary.

8. Install the chain tensioning tool 303-532 to the exhaust
camshaft sprocket, Bank 1.
Reposition the sprockets to the most advantageous
position for use of the tool.
Remove the tool.
9. Install the primary timi ng chain, Bank 1.
1. Install the primary chain over the crankshaft sprocket and the intake camshaft sp rocket. There must be no
slack on the drive side of the primary chain and the
sprockets should not be rotated on the camshafts (or
the tensioning tool may not fit).

10. Install the primary ch ain tensioner blade.
1. Position the tensioner blade to the cylinder block.
2. Install the retaining / pivo t bolt and tighten it to 12-
16 Nm.

11. Install the primary chain te nsioner assembly. Refer to
Operation 12.65.54.
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. 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 sprock et securing bolt to 115-
125 Nm.
13. Tighten the intake camshaft sprocket 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, ti ghten the securing bolt to
115-125 Nm.
Remove the chain tensioning tool and the wedge(s).

14. Remove the camshaft locking tool 303-530.
15. Raise the vehicle on the ramp.
16. Remove the crankshaft setting tool 303-531.

17. Install the crankshaft position sensor.
1. Install the sensor to the flywheel housing and install
the securing bolt. Tighten to 6-8 Nm.
2. Install the access grommet to the housing.
18. Lower the ramp.
19. Install the Timing Cover. Refer to Operation 12.65.01.
20. Move the engine compartment cover from the service position
and connect the gas struts.
21. Remove the paint protection sheets and close the cover.
22. Connect the battery and in stall the battery cover.
Refer to the Battery Reconnection Procedure 86.15.15.

Engine - Primary Timing Chain 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 VVT bush carrier.
1. Remove the three bolts which secure the carrier to the cylinder block.