2010 JAGUAR XFR Engine

Engine System - General Information - Piston Inspection
General Procedures Published: 11-May-2011


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.

Engine System - General Information - Piston Pin Diameter
General Procedures Published: 11-May-2011


1. NOTE: The piston and piston pin are a matched pair. Do not
mix up the components.
Measure the piston pin diameter.
Measure the diameter in two directions.
If the values are not to specification, install a new
piston and a new piston pin.

Published: 11-May-2011
Engine System - General Information - Piston Pin to Bore Diameter
General Procedures


1. NOTE: The piston and piston pin form a matched pair. Do not mix up
the components.

Measure the diameter of the piston pin bore.
Measure the diameter in two directions.
If the values are not to specification, install both a new piston
and a new piston pin.

Engine System - General Information - Piston Ring End Gap
General Procedures Published: 11-May-2011


1. CAUTION: Do not mix up the piston rings. Install the
piston rings in the same position and location.
Using the Feeler Gauge, measure the piston ring gap.
The values given in the specification refer to a gauge
ring used during production.

Published: 11-May-2011
Engine System - General Information - Piston Ring-to-Groove Clearance
General Procedures


1. NOTE: The piston ring must protrude from the piston groove.
To determine the piston ring clearance, insert the Feeler
Gauge right to the back of the groove, behind the wear ridge.
Using the Feeler Gauge, measure the piston ring clearance. www.JagDocs.com

Engine System - General Information - Valve Stem Diameter
General Procedures Published: 11-May-2011

1. Using a micrometer measure the diameter of the valve stems.
If the measurements are not to specification, install a
new valve.

Engine System - General Information - Cylinder Head Distortion
General Procedures

Check Published: 17-Jun-2014

1. Using a suitable metallic straight edge and feeler gauge, measure the
cylinder head face in the areas illustrated. Note the maximum value.





2. CAUTION: Machine the minimum thickness of material from the cylinder
head to meet specification. If a selection of cylinder head gaskets are
available, increase the thickness of the cylinder head gasket by one
size.
NOTES: www.JagDocs.com

Prior to having the cylinder head machined, prior approval is
required by Jaguar or Land Rover engineering.


If the cylinder head requires machining, this must be carried out by
a local engineering company.

If the cylinder head exceeds the maximum value (0.2mm), the cylinder
head must be machined.