Jaguar XJ (X350). Service manual — part 303

Cylinder Bore Out-of-Round

1. NOTE:

The main bearing caps or lower crankcase must be in place and tightened to the specified
torque; however, the bearing shells should not be installed.

Measure the cylinder bore with an internal micrometer.

•

Carry out the measurements in different directions and at different heights to determine

if there is any out-of-roundness or tapering.

•

If the measurement is out of the specified range, hone out the cylinder block or install a

new block.

Cylinder Head Distortion

1. Measure the cylinder block/cylinder head distortion.

•

Using the special tool, measure the mating face distortion.

•

If the value is not to specification rework the mating face.

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Exhaust Manifold Cleaning and Inspection

1. Inspect the cylinder head joining flanges of the exhaust manifold for evidence of exhaust
gas leaks.


2. Inspect the exhaust manifold for cracks, damaged gasket surfaces, or other damage that
would make it unfit for further use.

Piston Inspection

1.

CAUTION: Do not use any aggressive cleaning fluid or a wire brush to clean the

piston.

Carry out a visual inspection.

•

Clean the piston skirt, pin bush, ring grooves and crown and check for wear or cracks.

•

If there are signs of wear on the piston skirt, check whether the connecting rod is twisted

or bent.

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