Compression Check

WARNING: This page is about a different variant/trim than selected.

Warm up engine to normal operating temperature.
Stop engine after warming up.
After warming up, place shift select lever to "P" range, and set parking brake and block drive wheels.
Remove engine cover and air cleaner outlet hose.
CAUTION: When removing engine cover, be sure to lift up its front side to prevent breakage of engine cover claws.
Remove spark plug. See SPARK PLUG REMOVAL AND INSTALLATION .
Disconnect fuel injector connectors.
Install special tools (Compression gauge) into spark plug hole.
Special Tool

(A): 09915-64512

(B): 09915-64530

(C): 09915-67010

Fig 1: Identifying Special Tools (Compression Gauge) Into Spark Plug Hole
Courtesy of SUZUKI OF AMERICA CORP.
Depress accelerator pedal all the way to make throttle fully open.
Crank engine with fully charged battery, and read the highest pressure on compression gauge.
NOTE:
- For measuring compression pressure, crank engine at least 200 RPM using fully charged battery.
- If measured compression pressure is lower than limit value, check installation condition of special tool. If it is properly installed, it way be leakage from piston ring and valve seat.
Compression pressure

Standard: 1200 kPa (12.2 kgf/cm ² , 174 psi)

Limit: 1000 kPa (10.2 kgf/cm ² , 145 psi)

Max. difference between any two cylinders: 150 kPa (1.5 kgf/cm ² , 21.8 psi)
Carry out Steps 6) through 8) on all cylinders to obtain 6 readings.
Install spark plugs and ignition coil assemblies. See SPARK PLUG REMOVAL AND INSTALLATION .
Connect ignition coil connectors.
Connect fuel injector wires to their connectors.
Install engine cover and air cleaner outlet hose.