Compression Check; Compression; Compression Test Procedure - Suzuki GS1100G 1982 Service Manual

3-9 SERVICING
ENGINE
COMPRESSlON CHECK
The compressian of a cylinder is a good indicator
of its internal condition. The decision t o overhaul
the cylinders
is
often based on the results of a
compression test. Periodic maintenance records
kept at your dealership should include compression
readings for each maintenance service.
COMPRESSION
Standard Limii Difference
800
-
T 200 kPa
200
kPa
100 psi 28 psi
Low compression pressure can indicate
any
of the
following conditions:
*
Excessively worn cylinder wall
*
Worn-down piston or piston rings
Piston rings stuck in the grooves
* Poor
sealing of valves
* Leaking or otherwise
defective cylinder head
gasket
Overhaul the engine in the following cases:
*
Compression pressure
in one of the cylinders is
less than
700 kPa (7 kglcm2, 100
psi).
Difference in compression pressure between the
COMPRESSION TEST PROCEDURE
NOTE:
*
&tore testing
the compression of the
engine, make sure that the cylinder head
nuts and bolts are torqued:
to
specification.
*
Warm up the engine before
testing.
-
-
a Remove all spark plugs.
*
Fit the compression gauge
@
in one of the plug
holes, while taking care that the connection is
tight.
Twist the throttle grip full open.
rn Crank the engine
a
few seconds with the starter,
and record the maximum gauge reading as the
compression of that cylinder.
*
Repeat this procedure with the other cylinder.
two is more than 200 kPa (2
kg/cm2,
28
psi).
*
All compression pressure are below 800 kPa
(8 kg/crn2, 1 14 psi
J
(standard) even when
they
measure more than
700 kPa (7
kg/cm2, 100 psi).
0991 5 - 6451
0 Compression gauge