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Home >> Jaguar >> 2011 >> XK 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 47 (Engine System - General Information -- XK/X150) >> Engine System - General Information >> Cylinder Compression Test - V8 S/C 5.0L Petrol >> General Procedures >> Check

General Procedures: Check

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CAUTION: Before disconnecting or removing components, make sure the area around the joint faces and connections are clean. Plug open connections to prevent contamination.
NOTE:
  • Removal steps in this procedure may contain installation details.
  • Some variation in the illustrations may occur, but the essential information is always correct.
  • The vehicle battery must be in good condition and fully charged before carrying out this procedure.
  1. Remove the ignition coil-on-plugs.

    Refer to: Spark Plugs - V8 S/C 5.0L Petrol

    2. CAUTION: Make sure the fuel injection system is disabled before carrying out a cylinder compression test. Failure to follow this step may result in damage to the vehicle.
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    Repeat procedure for the other side.

  3. Crank engine for approximately five seconds to remove any remaining fuel in the cylinders.
    4. NOTE: Dry cylinder compression test.
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    Install the compression test gauge.

    5. NOTE:
    • This step requires the aid of another technician.
    • Print graphic number E164747 in step  11. Use this graphic to record each cylinder compression figure.
    • The vehicle battery must be in good condition and fully charged before carrying out this procedure.
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    Crank the engine for 10 seconds and record the figure displayed on the compression test gauge. Make sure the pressure is released from the compression test gauge after each cylinder recording. Repeat the process for all cylinders.

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    Remove the compression test gauge.

    7. NOTE: Wet cylinder compression test.
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    Using a suitable syringe add 10 ml of clean engine oil into the cylinder.

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    Install the compression test gauge.

    9. NOTE:
    • This step requires the aid of another technician.
    • Print graphic number E164747 in Step  11. Use this graphic to record each cylinder compression figure.
    • The vehicle battery must be in good condition and fully charged before carrying out this procedure.
  9. G11284751

    Crank the engine for 10 seconds and record the figure displayed on the compression test gauge. Make sure the pressure is released from the compression test gauge after each cylinder recording. Repeat the process for all cylinders.

  10. After each wet cylinder compression test remove the compression test gauge and crank engine for approximately 10 seconds to remove engine oil from the cylinder.
    11. NOTE:
    • A= dry cylinder compression test.
    • B= wet cylinder compression test.
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    12. NOTE: Remove and discard all blanking caps.

  12. To install, reverse the removal procedure.

  13. The minimum cylinder compression reading recorded must be within 10% of the maximum cylinder compression reading recorded. If the difference across the cylinders is higher than 10% please contact dealer technical support (DTS) for further assistance.
  14. Using Jaguar approved diagnostic equipment, read and clear any diagnostic trouble codes (DTCs).
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