COMPRESSION INSPECTION [F2]

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Warning

• When the engine and the oil are hot, they can badly burn. Be careful not to burn yourself during removal/installation of each component.

1. Verify that the battery is furry chargetd.Reacharge it if necessary. (See BATTERY RECHARGING [F2].)

2. Warm up the engine to the normal operating temperature.

3. Perform "Fuel Line Safety Procedure." Leave the fuel pump relay removed. (See BEFORE SERVICE PRECAUTION [F2].)

4. Disconnect the igniter connector.

5. Remove the spark plugs.

6. Connect a compression gauge into the No.1 spark plug hole.

7. Fully depress the accelerator pedal and crank the engine.

8. Note the maximum gauge reading.

9. Inspect compression of each cylinder.

• If the compression in one or more cylinders is low or the compression difference between cylinders exceeds the maximum, pour a small amount of clean engine oil into the cylinder and verify the compression.

― If the compression increases, the piston, the piston rings, or cylinder wall may be worn and overhaul is required.

― If the compression stays low, a valve may be stuck or improperly seated and overhaul is required.

― If the compression in adjacent cylinders stays low, the cylinder head gasket may be damaged or the cylinder head distorted and overhaul is required.

Compression

Standard: 1,226 kPa {12.5 kgf/cm², 178 psi} [300 rpm]

Minimum: 858 kPa {8.75 kgf/cm², 124 psi} [300 rpm]

Maximum difference between cylinder: 196 kPa {2.0 kgf/cm², 28 psi}

10. Disconnect the compression gauge.

11. Install the spark plugs.

Tightening torque

16—20 N·m {1.7—2.0 kgf·m, 12—14 ft·lbf}

12. Connect the igniter connector.

13. Install the fuel pump relay.