Suzuki Wagon R Manual page 1198

COMPRESSION CHECK
Check compression pressure on all three cylinders as follows:
1) Warm up engine.
2) Stop engine after warming up.
NOTE:
After warming up engine, place transmission gear shift le-
ver in "Neutral" and set parking brake and block drive
wheels.
3) Remove all spark plugs and disconnect fuel injector wire har-
ness at coupler.
4) Disconnect ignition coil (1) wire harness at coupler (2).
WARNING:
Failure in disconnecting ignition coil coupler can cause
spark to occur in engine room possibly resulting in a
dangerous explosion.
5) Install special tool (Compression gauge) into spark plug hole.
Special Tool
(A): 09915-64510
6) Disengage clutch (to lighten starting load on engine) and de-
press accelerator pedal all the way to make throttle valve full-
open.
7) Crank engine with fully charged battery, and read the highest
pressure on compression gauge.
NOTE:
For measuring compression pressure, crank engine at
least 250 r/min. by using fully charged battery.
Standard
Limit
Max. difference
between any two
cylinders
8) Carry out steps 5) through 7) on each cylinder to obtain four
readings.
9) After checking, connect coupler of distributor, fuel injector and
install spark plugs.
ENGINE MECHANICAL 6A-7
Compression pressure
2
1400 kPa (14.0 kg/cm
2
1100 kPa (11.0 kg/cm , 156.4 psi)
2
100 kPa (1.0 kg/cm , 14.2 psi)
, 199.0 psi)