Engine Compression Inspection: Inspection

NOTE: After this inspection, you must reset PGM-FI ECU in the PGM-FI INSPECTION menu with the HDS to cancel ALL INJECTORS STOP and STARTER TEST functions.

Engine Compression - Inspection

Courtesy of HONDA, U.S.A., INC.

1. Attach the compression gauge to a spark plug hole.

NOTE: Use a compression gauge with a connecting length (between the edge and the flange) of less than 23 mm (0.9 in).

2. Step on the accelerator pedal to open the throttle fully, crank the engine with the starter motor, and measure the compression.

Compression Pressure:

Above 980 kPa (10.0 kgf/cm² , 142 psi)

3. Measure the compression on the remaining cylinders.

Maximum Variation:

Within 200 kPa (2.0 kgf/cm² , 28 psi)

4. If the compression is not within specifications, perform a cylinder leak down test to determine the problem area. Then check the following items, and remeasure the compression:

Incorrect valve clearance.
Confirmation of cam timing.
Damaged or worn cam lobes.
Looseness of exhaust side spark plug.
Damaged or worn valves and seats.
Damaged cylinder head gasket.
Damaged or worn piston rings.
Damaged or worn piston and cylinder bore.

5. Remove the compression gauge from the spark plug hole.