Compression Check

1)Warm up engine to normal operating temperature.

2)Stop engine after warming up.

3)For M/T model, place gear shift lever in “Neutral” and apply parking brake.
For A/T model, place select lever in P range and apply parking brake.

4)Remove air cleaner assembly.

5)Remove all ignition coil assemblies and all spark plugs.

6)Disconnect all fuel injector connectors.

7)Install special tools into spark plug hole.

Special Tool

(A): 09915–64512
(B): 09915–64530
(C): 09915–67010

8)Disengage clutch (1) (to lighten starting load on engine) for M/T model, and depress accelerator pedal (2) all the way to make throttle fully open.

9)Crank engine with fully charged battery, and read the highest pressure on special tool.

NOTE:

•For measuring compression pressure, crank engine at least 200 rpm with fully charged battery.
•Check installation condition of special tool if measured compression pressure is lower than the limit.
•If the measured compression pressure of particular cylinder is lower than the limit, add a bit of engine oil into the cylinder through the spark plug hole, and then repeat the compression check.

—If the compression pressure increases after adding engine oil, the following may be the cause:

—Pressure leakage due to worn piston rings or worn cylinder

—If the compression pressure does not increase, one of the following may be the cause:

—Incorrect valve timing
—Pressure leakage from the valve or valve seats
—Pressure leakage from the cylinder head gasket

Compression pressure

Standard: 1,600 kPa (16.3 kgf/cm², 232 psi)

Limit: 1,300 kPa (13.3 kgf/cm², 189 psi)

Max. difference between any two cylinders: 100 kPa (1.0 kgf/cm², 14.5 psi)

10)Carry out Step 7) – 9) on each cylinder to obtain 4 readings.

11)Install spark plugs and ignition coil assemblies.

12)Connect fuel injector connectors.

13)Install air cleaner assembly.