Compression Check: Testing and Inspection

INSPECT COMPRESSION
a. Warm up and stop the engine.
b. Remove the engine cover No. 1.
c. Remove the 4 ignition coils.
d. Remove the 4 spark plugs.
e. Disconnect the 4 fuel injector connectors.





f. Inspect cylinder compression pressure.
1. Insert a compression gauge into the spark plug hole.
SST 09992-00500
2. Fully open the throttle.
3. While cranking the engine, measure the compression pressure.
Compression pressure 1,300 kPa (13.3 kgf/cm2, 189 psi)
Minimum pressure: 1,000 kPa (10.2 kgf/cm2, 145 psi)
Difference between each cylinder: 100 kPa (1.0 kgf/cm2, 14 psi)

NOTICE:
- Use a fully charged battery so the engine speed can be increased to 250 rpm or more.
- Inspect the other cylinders in the same way.
- Measure the compression in as short a time possible.

4. If the cylinder compression is low, pour a light coat of engine oil into the cylinder through the spark plug hole, then inspect it again.

HINT:
- If adding oil increases the compression, the piston rings and/or cylinder bore may be worn or damaged.
- If the pressure stays low, the valve may be stuck or seated improperly, or there may be leakage from the gasket.

g. Connect the 4 fuel injector connectors.
h. Install the 4 spark plugs.
Torque: 19 Nm (194 kgf-cm, 14 ft. lbs.)
i. Install the 4 ignition coils.
j. Install the engine cover No. 1.