Cylinder Head

Engine Compression Inspection

 6-6  

  1. Warm up the engine to normal operating temperature (cooling fan comes on).
  1. Turn the ignition switch OFF.
  1. Remove the intake manifold cover (see step 1 on page 6-24).
  1. Disconnect all four injector connectors.
  1. Start the engine and let it run until it stalls.
  1. Remove the four ignition coils (see page 4-17).
  1. Remove the four spark plugs.
  1. Attach the compression gauge to the spark plug hole.

  1. Connect a tachometer.
  1. Open the throttle fully, then crank the engine with the starter motor and measure the compression.

    Compression Pressure:

Above 930 kPa (9.5 kgf/cm2, 135 psi)-250 rpm

  1. Measure the compression on the remaining cylinders.

    Maximum variation:

Within 200 kPa (2.0 kgf/cm2, 28 psi)

  1. If the compression is not within specifications, check the following items, then re measure the compression.
  • Damaged or worn valves and seats
  • Damaged cylinder head gasket
  • Damaged or worn piston rings
  • Damaged or worn piston and cylinder bore