1998 JAGUAR X308 head bolt

21. L
oosen the bolt which secures the VVT unit to the camshaft.
22. Remove the camshaft locking tool 303 - 530 (installed for previous
operation).

23. R
emove the primary chain tensioner bolts.

24 . R
emove the tensioner assembly.
1. Remove the tensioner.
2. Remove the tens ioner back-plate.

25 . R
emove the primary chain tensioner blade.
1. Remove the pivot bolt which secures the tensioner blade.
2. Remove the tensioner blade.
26. Remove the primary chain from the VVT unit and from the crankshaft
pulley.

27 . R
emove the VVT unit and exhaust camshaft sprocket.
1. Remove the securing bolt from both the VVT unit and the exhaust cam sprocket.
2. Remove the VVT unit, exhaust sprocket and secondary chain as an assembly (release the chain from the tensioner which is still
secured to the cylinder head).
Re
move the secondary chain from
the VVT unit and the sprocket.
28. Remove the secondary chain tensioner.

1.
Remove the two bolts which secure the chain tensioner to the
cylinder head.
2. Remove the tensioner.

29
.
Remove the chain guide.
1. Remove the bolt which secures the chain guide.
2. Note the orientation of the chain guide and remove it from the upper retaining pin.

30
.
Remove the camshafts.
1. Remove the bolts which secure the camshaft caps; loosen them evenly, in stages.
2. Remove the camshaft caps. Note their orientation and markings -
each is marked with its position (a number) and orientation (an
arrow).
3. Remove the camshafts from the engine.

31
.
Remove the tappets and shims.
1. Note the position of each tappet, for reassembly, and remove each
tappet and shim assembly - retain each shim with its original
tappet.
Mark
the inside face of each tappet in pencil or felt tipped pen, with its
original position within the cylinder head.

32
.
Remove residual coolant from the cylinder head.
1. Place a drain tray under the engine.
2. Use a syringe with a length of thin rubber pipe connected, to drain the residual coolant from the outlet pipe water-way.
A s
uitable syringe is Snap On YA 745.
33. Remove the cylinder head.
1. Place cloth around the area of th e cylinder head to absorb coolant
spillage, when removing the head.
2. Remove the bolts (10xM10 and 2xM8) which secure the cylinder

Installation

hea
d.
3. With assistance, remove the cylinder head.

34 . R
emove the cylinder head gasket.
1. Note how the gasket is installed and remove it.
2. Remove and discard the cloth, placed previously to absorb coolant spillage.
Wipe up any l e
aked coolant.
35. Remove the coolant drain tray from under the engine.
36. Remove and discard the gasket from the downpipe catalyst.
Cle
an the gasket faces of the catalyst and the exhaust manifold.
37. Clean cylinder head and cylinder block gasket faces.
Ensu
re that all threaded holes in the cylinder block face are clean and
free from oil.
Cl ean and
inspect the cylinder head bolts. They may be re-used on two
occasions. When re- used, each bolt head should be marked with one
dot from an automatic centre punch.
38. Clean and inspect all relevant components and mating faces.
1. CAUTIONS: If a replacement cylinder head is to be installed to a vehicle with VCT
the cylinder head must have the oil gallery blind rivet removed before
installation.
Make sure that all debris is removed from the cylinder head and cylinder
head oil gallery.
Vehicles fitted with VCT: Remove the blind rivet from the VCT oil gallary. • NOTE: The centre bore of the blind rivet is 6 mm diameter.

8.
With assistance, install the cylinder head.
Engage t

he cylinder head with the dowels on the block face, and the
exhaust manifold flange with the studs on the downpipe catalyst.
9. Install the cylinder head bolts, hand tight only.

10 . Ti
ghten the cylinder head bolts in stages, in the sequence shown, using
the following procedure:
Stage 1 - ti
ghten all M10 bolt
s in sequence, to 20 Nm.
11. Stage 2 - tighten all M10 bolt s in sequence, to 35 Nm.

14. Stag
e 5 - tighten the two M8 bolts at the front of the cylinder head to 25
Nm.

15. I
nstall the tappet and shim assemblies.
Lubrica

te each tappet assembly.
1. Install each tappet and shim asse mbly to its previously identified
position in the cylinder head.
16. Apply oil (EP-90) to the camshaft and bearing surfaces, as follows:

To th
e upper face of each bearing surface (two places) in the cylinder
head.
To th
e upper face of each bearing surface (two places) in each bearing
cap.
On
the cam lobes ONLY, not on the base circle area.

17
.
Install the camshafts.
1. Install the camshafts to position in the cylinder head, with the timing flats uppermost.
2. Install the camshaft caps to their respective locations (inlet 0 to 4 and exhaust 5 to 9 from the front) and in the correct orientation
(arrow to front of engine).
3. Install and tighten the cap securing bolts. Tighten evenly, in stages, to 10 Nm.
18. Install the camshaft locking tool 303 - 530, align the camshafts as
necessary.

19
.
Install the chain guide.
• NOTE: The chain guide must be installed so that the slotted hole is
towards the top, and the raised shoulder to the cylinder block. 1. Install the chain guide to the block and locate it onto the upper retaining pin.
2. Install the retaining bolt and tighten it to 12 Nm.

20
.
Push the secondary chain tensioner piston into the body to provide
clearance for installing the chain.
1. Insert a thin rigid wire through the hole in the end of the tensioner
piston to displace the ball from the non-return valve seat.
2. With the wire in position, press the piston fully into the tensioner body.
Re
move the wire.

21
.
Install the secondary chain tensioner to the engine.
1. Fully seat the tensioner to the cylinder head.
2. Install the two bolts which secure the tensioner and tighten to 12 Nm.
22. Install the VVT unit to the engine.
A
ssemble the VVT unit, the exhaust camshaft sprocket and the

2. In
stall the access grommet to the housing.
36. Lower the ramp.

37. Ins
tall and tighten the nuts which secure the exhaust manifold to the
downpipe catalyst.

38 . In
stall new seals to the A-Bank VVT bush carrier.
1. Install the new sealing ring (scarf jointed) to the carrier bush groove.
2. Install a new O-ring to the carrier oil-way.

39 . Install the bush c
arrier to the cylinder block.
Lu
br
icate the seal (scarf
jointed) and the bush.
1. Install the bush carrier assembly.
Chec k that
the seals are
in place and that the ri ng dowels are engaged
squarely. Fully locate the assembly as much as possible by hand
pressure.
2. Install the three securing bolts. Tighten to 21 Nm.
40. Install new sealing rings to the coolant outlet pipe grooves.

41. Install the coolant
outlet pipe.
1. Install the outlet pipe to the bypass hose and to the cylinder heads.
2. Install the four bolts which secure the outlet pipe.
42. Connect the hoses and multi-plug to the coolant outlet pipe.
1. Connect the heater hose and reposition the hose clip.

Engine - Exhaust Camshaft 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 Exhaust Camshaft Sp rocket. Refer to Operation
12.65.74.
5. Remove the camshaft locking tool 303 - 530 (fitted for
previous operation).

6. Remove the camshaft.
1. Remove the bolts which secure the camshaft caps; loosen them evenly, in stages.
2. Remove the camshaft caps. Note their orientation and
markings - each is marked with its position (a
number) and orientation (an arrow).
3. Remove the camshaft from the engine.
7. Clean and inspect all relevant components.

1. Apply oil (EP - 90) to the cams haft and bearing surfaces, as
follows:
To the upper face of each be aring surface (two places) in
the cylinder head.
To the upper face of each be aring surface (two places) in
each bearing cap.
On the cam lobes ONLY, not on the base circle area.
2. Refit the camshaft.
1. Fit the camshaft to position in the cylinder head, with the timing flats uppermost.