Jaguar XJ (X350). Manual — part 418

Installation

All vehicles

1 . Check cylinder head face for distortion, across the center and from corner to corner.

2 . For cylinder head face distortion data, refer to specifications.

For additional information, refer to Specifications

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NOTE:

For cylinder head with distortion above the maximum allowance, the cylinder head

material must be measured.

Measure the cylinder head material.

Check measurement from the centre of the exhaust dowel to the cylinder

head face as shown.

If the measurement is less than 51.88 mm the cylinder head requires

replacement.

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CAUTION: 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.

CAUTION: 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.

Identify the VCT oil supply gallery and the 8 mm (0.31 inch) blind rivet.

Using a suitable 3 mm (0.12 inch) punch release the centre of the blind rivet

until it is released from the outer part of the blind rivet.

Using a suitable extraction tool, remove the remaining part of the blind

rivet.

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5 .

CAUTION: The head gasket must be installed over the cylinder block dowels.

Install a new cylinder head gasket

6 . NOTE:

Tighten the bolts 1 to 10 in the sequence shown.

Install the left-hand cylinder head.

1) Tighten bolts 1 to 10 to 20 Nm.

2) Tighten bolts 1 to 10 to 35 Nm.

3) Tighten bolts 1 to 10 to 90°.

4) Tighten bolts 1 to 10 to 90°.

5) Tighten bolts 11 to 12 to 25 Nm.

7 . NOTE:

Make sure all components are clean.

Apply oil (EP-90) to the camshaft and bearing surfaces, as follows:

To the upper face of each bearing surface in the cylinder head.

To the upper face of each bearing surface in each bearing cap.

On the cam lobes ONLY, not on the base circle area.

8 . Install the left-hand inlet camshaft.

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