## 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

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