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Check the Compression Pressure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 Jaguar XKR, 2009 Jaguar XK8, 2008 Jaguar XKR, 2008 Jaguar XK8, and 2007 Jaguar XKR. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Move gear selector lever to 'P' position. Failure to follow this instruction may result in personal injury.
  1. Remove the fuel pump relay.
  2. Start the engine - the engine will start, run for a few seconds then stall.
  3. Remove the spark plugs.
  4. Install the compression tester.
  5. Install an auxiliary starter switch in the starting circuit. With the ignition switch OFF, using the auxiliary starter switch, crank the engine a minimum of five compression strokes and record the highest reading. Note the approximate number of compression strokes required to obtain the highest reading.
  6. Repeat the test on each cylinder, cranking the engine approximately the same number of compression strokes.
  7. Install the removed components in reverse order, observing the specified tightening torques.
  8. Clear all DTCs from the ECM.
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