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SKU 94190
For technical questions, please call 1-800-444-3353.
WARNING: Wear protective gloves and ANSI-approved eye protection when
working on a hot engine. Keep hands away from the fan and other moving parts,
and protect yourself from electrical shock or burns. Be aware that working on a
gasoline engine is inherently dangerous, and suitable precautions must be taken.
1.
Before removing the spark plugs, clean the area around the spark plugs using
compressed air. It is important to prevent foreign materials from falling into the
cylinders once the spark plugs are removed.
2.
Disconnect the coil wire from the coil, and remove all spark plugs. Note the
position of the wires so that the correct wire may be replaced on each plug at
the end of the job. On engines with two spark plugs per cylinder, remove only
one plug per cylinder.
3.
Remove the oil dipstick, radiator cap, and disconnect one end of the PCV
hose. If the engine has a carburetor, remove the air cleaner and open the
throttle all the way. If the engine is fuel injected, remove the air cleaner or open
the throttle body.
4.
Position the cylinder to be tested at TDC on the compression stroke so all
valves are closed.
5.
Turn the Regulator Knob fully counterclockwise. Connect the Cylinder Leakage
Tester to a compressed air source (not included). NOTE: Be sure the air
compressor’s regulator is set from 7 to 100 PSI. Never operate this tester
with air pressure set higher than 100 PSI, which can damage this tool.
6.
Hand screw the Adapter Hose (10) into the spark plug hole of the cylinder to
be tested. Connect the male end of the adapter Hose to the female coupler of
the extension hose.
7.
Turn the Regulator Knob (9) clockwise until the Leakage Gauge (6) reads “0”
(zero) at the end of the yellow band.
8.
You can now read the amount of leakage on the Leakage Gauge (6) as a
percentage loss.
9.
Test the remaining cylinders to determine which if any cylinders are bad.
10. Use the diagnostic techniques in the next section to determine the cause of
the problem.
REV 09/06
