Compression Check

WARNING: This page is about a different car, the 2008 Suzuki Grand Vitara, 2007 Suzuki Grand Vitara, and 2006 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.

Check compression pressure on all 6 cylinders as follows:

Warm up engine.
Stop engine after warming up.
Remove surge tank cover and disconnect ignition coil harness couplers.
Remove all ignition coils (1) and spark plugs (2) referring to SPARK PLUG REMOVAL AND INSTALLATION .

Fig 1: Identifying Ignition Coils & Spark Plugs
Courtesy of SUZUKI OF AMERICA CORP.
Disconnect fuel injector wire harness at connector
Install special tool (Compression gauge) into spark plug hole.
Special Tool
1. 09915-64512
2. 09915-64530
3. 09915-67010
  
  Fig 2: Installing Special Tool (Compression Gauge) Into Spark Plug Hole
  Courtesy of SUZUKI OF AMERICA CORP.
Disengage clutch (to lighten starting load on engine) for M/T vehicle, and depress accelerator pedal all the way to make throttle fully open.

Fig 3: Locating Clutch & Accelerator Pedals
Courtesy of SUZUKI OF AMERICA CORP.
Crank engine with fully charged battery, and read the highest pressure on compression gauge.
NOTE: For measuring compression pressure, crank engine at least 250 RPM by using fully charged battery.

Compression pressure

Standard: 1400 - 1600 kPa (14.0 - 16.0 kg/cm ² , 199.0 - 227.5 psi)

Limit: 1100 kPa (11.0 kg/cm ² , 156.0 psi)

Max. difference between any two cylinders: 100 kPa (1.0 kg/cm ² , 14.2 psi)
Carry out steps 6, 7 and 8 on each cylinder to obtain 6 readings.