## Cylinder Head

#### Engine Compression Inspection

6-8

1. Warm up the engine to normal operating temperature (cooling fan comes on).

2. Turn the ignition switch OFF.
3. Remove the air cleaner housing (see step 6 on page 6-29).
4. Disconnect all four injector connectors.
5. Start the engine and let it run until it stalls.
6. Remove the all four ignition coils (see page 4-24).
7. Remove the all four spark plugs.
8. Attach the compression gauge to the spark plug hole.

9. Connect a tachometer.
10. 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 (min-1)

11. Measure the compression on the remaining cylinders.

    Maximum variation:

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

12. If the compression is not within specifications, check the following items, then remeasure the compression.

- Damaged or worn valves and seats
- Damaged cylinder head gasket
- Damaged or worn piston rings
- Damaged or worn piston and cylinder bore