1998 JAGUAR X308 Timing chain

Engine - Primary Timing Chain Outer Guide LH
In-vehicle Repair
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 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 Assembly from the B-Bank.
Refer to Operation 12.65.52 in this Section.
6. Remove the Timing Chain Tens ioner - Primary, from the B-
Bank. Refer to Operation 12.65.55 in this Section.

7. Fit a Tie-Strap through the link s of the primary chain, just
above the crankshaft sprocket, to retain the chain to the
sprocket.

8. Rotate the inlet camshaft (and the exhaust camshaft), using a
spanner on the flats, to provide sufficient slack in the chain to
remove the chain guide.
9. Remove the chain guide.
1. Remove the bolt which secures the chain guide.
2. Note the orientation of the chain guide and remove it

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.

Engine - Primary Timing Chain Outer Guide RH
In-vehicle Repair
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 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 Assembly from the A-Bank.
Refer to Operation 12.65.51 in this Section.
6. Remove the Timing Chain Tens ioner - Primary, from the A-
Bank. Refer to Operation 12.65.54 in this Section.

7. Fit a Tie-Strap through the link s of the primary chain, just
above the crankshaft sprocket, to retain the chain to the
sprocket.

8. Rotate the inlet camshaft (and the exhaust camshaft), using a
spanner on the flats, to provide sufficient slack in the chain to
remove the chain guide.
9. Remove the chain tensioner blade.
1. Remove the pivot bolt which secures the tensioner blade.

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.

Engine - Primary Timing Chain Tensioner 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 primary ch ain tensioner bolts.

6. Remove the tensioner assembly.
1. Remove the tensioner.
2. Remove the tensioner back-plate.
7. Clean and inspect all relevant components.
1. Push the tensioner piston into the body to provide clearance
for fitting.
1. Insert a thin rigid wire th rough the hole in the end of
the tensioner piston to displace the ball from the non-
return valve seat.

Engine - Primary Timing Chain Tensioner RH
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 primary ch ain tensioner bolts.

6. Remove the tensioner assembly.
1. Remove the tensioner.
2. Remove the tensioner back-plate.
7. Clean and inspect all relevant components.
1. Push the tensioner piston into the body to provide clearance
for fitting.
1. Insert a thin rigid wire th rough the hole in the end of
the tensioner piston to displace the ball from the non-
return valve seat.

Engine - Secondary Timing Chain LH
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 12.65.52 in this Section
6. Raise the vehicle on a ramp.
7. Remove the crankshaft position sensor.

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.