Jaguar XJ (X350). Service manual — part 307

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Restricted exhaust system.

Action(s) to take:

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INSPECT the exhaust system. <<309-00>>

Excessive or insufficient compression.

Possible Source(s):

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Valve(s) burnt or sticking.

Action(s) to take:

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INSPECT the valve(s).

Possible Source(s):

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Valve spring(s) weak or broken.

Action(s) to take:

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INSPECT the valve spring(s).

Possible Source(s):

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Piston ring(s) worn, damaged, sticking or worn piston/cylinder.

Action(s) to take:

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INSTALL a new engine.

Possible Source(s):

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Head gasket damaged.

Action(s) to take:

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INSPECT the head gasket.

Possible Source(s):

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Carbon accumulation in combustion chamber.

Action(s) to take:

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ELIMINATE carbon build up.

Possible Source(s):

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Fuel system damaged or inoperative.

Action(s) to take:

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<<303-04A>> Or <<303-04B>>

Excessive oil consumption

Possible Source(s):

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Piston ring(s) worn, damaged, sticking or worn piston/cylinder.

Action(s) to take:

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INSTALL a new engine.

Possible Source(s):

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Valve stem seal worn or missing.

Action(s) to take:

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INSPECT the valve or valve stem seal.

Possible Source(s):

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Oil leakage.

Action(s) to take:

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REPAIR oil leakage.

Possible Source(s):

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Valve stem or valve guide worn.

Action(s) to take:

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INSPECT the valve stem or valve guide.

Possible Source(s):

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Incorrect oil viscosity.

Action(s) to take:

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DRAIN and FILL with new oil.

Possible Source(s):

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Diluted oil.

Action(s) to take:

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CHECK oil dilution. DRAIN and FILL as necessary.

Possible Source(s):

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Crankcase overfilled.

Action(s) to take:

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CHECK and adjust the oil level.

Possible Source(s):

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Incorrect oil pressure.

Action(s) to take:

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CHECK the oil pressure. REPAIR as necessary.

Engine noise

Possible Source(s):

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Excessive crankshaft main bearing clearance.

Action(s) to take:

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INSTALL a new engine.

Possible Source(s):

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Excessive crankshaft end play.

Action(s) to take:

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INSTALL a new engine.

Possible Source(s):

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Excessive connecting rod bearing oil clearance.

Action(s) to take:

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INSTALL a new engine.

Possible Source(s):

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Piston/cylinder worn.

Action(s) to take:

•

INSTALL a new engine.

Possible Source(s):

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Piston ring damaged.

Action(s) to take:

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INSTALL a new engine.

Possible Source(s):

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Connecting rod bent.

Action(s) to take:

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INSTALL a new engine.

Possible Source(s):

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Valve spring(s) broken.

Action(s) to take:

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INSPECT the valve spring(s).

Possible Source(s):

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Excessive valve guide clearance.

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