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Home >> Jaguar >> 2020 >> XF Checkered Flag >> Repair and Diagnosis >> External Pages >> Different car >> Section 109 (Engine System - General Information -- XE (X760)) >> Engine System - General Information >> Cylinder Compression Test - INGENIUM I4 2.0L Petrol >> General Procedures >> Check

General Procedures: Check

WARNING: This page is about a different car, the 2018 Jaguar XE and 2017 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • This procedure contains some variation in the illustration depending on the vehicle specification, but essential information is always correct.
  • This procedure contains illustrations showing certain components removed to provide extra clarity.
  1. Remove the spark plugs.
  2. Disconnect the electrical connector for the fuel injector wiring harness.
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  3. Crank the engine for approximately five seconds to remove any remaining fuel in the cylinders.
  4. Install the compression test gauge.
    NOTE: Dry cylinder compression test.
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    General Equipment:  Compression tester and adapters

  5. 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 the cylinders.
    NOTE:
    • This step requires the aid of another technician.
    • Print graphic number E199482 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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  6. Remove the compression test gauge.
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  7. Using a suitable syringe add 10 ml of clean engine oil into the cylinder.
    NOTE: Wet cylinder compression test.
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  8. Install the compression test gauge.
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  9. 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 the cylinders.
    NOTE:
    • This step requires the aid of another technician.
    • Print graphic number E199482 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.
    G11308896
  10. After each wet cylinder compression test remove the compression test gauge and crank engine for approximately 10 seconds to remove any engine oil from the cylinder.
  11. 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.
  12. Use this illustration to record each cylinder compression figure.
    NOTE:
    • A = dry cylinder compression test.
    • B = wet cylinder compression test.
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  13. Connect the electrical connector for the fuel injector wiring harness.
  14. Install the spark plugs.
  15. Using Jaguar approved diagnostic equipment, read and clear any diagnostic trouble codes (DTCs).

    General Equipment:  Jaguar approved diagnostic tool

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