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Engine Compression Inspection

  1. Warm up the engine to normal operating temperature (cooling fan comes on).
  2. Turn the ignition switch OFF.
  3. Turn the battery module switch OFF.
  4. Remove the engine cover.
  5. Disconnect the three injector connector.
  6. Remove the three ignition coils (see IGNITION COIL REMOVAL/INSTALLATION ).
  7. Remove the three spark plugs.
  8. Attach the compression gauge to a spark plug hole.
    Fig 1: Attaching Compression Gauge To Spark Plug Hole
    G03680377Courtesy of AMERICAN HONDA MOTOR CO., INC.
  9. Open the throttle fully, crank the engine with the starter motor and measure the compression.

    Compression Pressure: 

    Above 880 kPa (9.0kgf/cm 2  ,128 psi) 

  10. Measure the compression on the remaining cylinders.

    Maximum Variation: 

    Within 200 kPa (2.0kgf/cm 2  ,28 psi) 

  11. If the compression is not within specifications, check the following items, then remeasure the compression.
    • Damaged or worn valves and seals
    • Damaged cylinder head gasket
    • Damaged or worn piston rings
    • Damaged or worn piston and cylinder bore
  12. Remove the compression gauge from the spark plug hole.
  13. Install the three spark plugs.
  14. Install the three ignition coils (see IGNITION COIL REMOVAL/INSTALLATION ).
  15. Connect the three injector connectors.
  16. Turn the battery module switch ON.
  17. Reset the ECM using the HDS (see HDS CLEAR COMMAND ).
  18. Do the ECM idle learn procedure (see ECM IDLE LEARN PROCEDURE ).
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