PRODUCT INFORMATION
INDEX
DATE
Dep.2
IO-C-M-00-006e
A
February 2012
KOHLER ENGINE
CYLINDER COMPRESSION TEST
1/3
1. AIM
For a correct measurement, you will need both the special tool that fits into the injector or spark plug hole and a
pressure gauge, which is a commercial product (Moto Meter, Facom, etc.), adapting to the said tool.
Whenever you measure the compression pressure of one cylinder, always check all the remaining cylinders as
well. If the fault diagnostic indicates that only one cylinder should be compression-tested, then you can perform
the test, by removing the spark plug from the cylinder and operating the starter motor without turning on ignition.
2. TEST PROCEDURE
Before starting the test, make sure the engine is warm and
-
Diesel and Dual Fuel Engines: all the injection pipes are loose and all the rocker covers removed, thus
preventing the engine from starting while measuring the pressure. Moreover, cut off the fuel supply.
-
Gas and Ethanol Engines: disconnect all of spark plug wires, so that the engine will not start while checking
the compression pressure. For safety’s sake, close the gas supply valve and disable the ignition system. Also,
remove all the spark plugs, so the engine can rotate easily.
Next, do the following:
-
Diesel and Dual Fuel Engines: Insert the tool (
Kohler
ref.: 19.75.065) with a
copper washer in the place of the jet, to ensure adequate cylinder sealing.
Special tool -
Ref.: 16.75.065
Compression pressure gauge
Compression pressure recording card
5.2.19
O&M_2.002211.810_A_10_2016
