Engine Compression Inspection - Honda Civic 2002-2003 Service Manual

Cylinder Head
Engine Compression Inspection
1. Warm up the engine to normal operating
temperature (cooling fan comes on).
2. Turn the ignition switch OFF.
3. Remove the intake manifold cover (see step 1 on
page 6-22).
4. Disconnect all four injector connectors.
5. Start the engine, and let it run until it stalls.
6. Remove the four ignition coils (see page 4-18).
7. Remove the four spark plugs.
8. Attach the compression gauge to the spark plug
hole.
6-6
9. Open the throttle fully, then crank the engine with
the starter motor and measure the compression.
Compression Pressure
Above 930 kpa (9.5 kgf/cm', 135 psi)
10. Measure the compression on the remaining
cylinders.
Maximum variation
Within 200 kPa (2.0 kgf/cm', 28 psi)
11. If the compression is not within specifications,
check these 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