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Item 64917
Operating Instructions
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the
beginning of this document before set up or use of this produ
ct.
NOTE:
Performing a compression test requires the work of
two
individuals;
one person to operate the vehicle’s ignition switch while the
other person operates the Compression Tester.
1.
WARNING! Avoid carbon
monoxide poisoning! Never run
a gasoline engine in an enclosed
garage or other contained area.
Prepare the engine for compression
testing by starting the engine
and allowing it to warm up to its
normal operating temperature.
Then, switch off the ignition.
2. Once the engine has been turned
off, disconnect ground (negative)
battery cable before testing to prevent
accidental starting. Disconnect both
coil wires from the coil of the engine.
Insulate coil wires or route them away
from each other and all metal surfaces.
3. 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.
4. Remove all of the 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.
5. Determine the correct size Spark Plug
Adapter and/or Hose Assembly for
the vehicle. Thread Adapter and/or
Hose into spark plug hole of cylinder
to be tested and hand tighten only.
6. Connect the male fitting on the
Hose Assembly to the female
coupler on the Gauge Hose.
7. To use the Triton Connector, thread
it onto the end of one of the Hose
Assemblies or the Deep Well Connector.
8. With the gas pedal pressed all
the way down, crank the engine
for at least eight revolutions.
9. While cranking the engine, observe the
Gauge. Record the maximum reading.
10. After recording the maximum reading,
stop cranking the engine. Release
the air pressure in the Gauge by
pressing the Air Release Button.
11. Remove the Compression Tester
from the first engine cylinder.
Then repeat Steps 6, 7, 8 and 9 for
the remaining engine cylinders.
NOTE:
Good engine cylinder compression
will be indicated with a high initial reading,
and a progressive build-up to the final
maximum reading. Poor engine cylinder
compression will be indicated with a
low initial reading, and a much slower
build-up to the final maximum reading.
The compression readings for all of
the engine cylinders should not vary
by more than 10%. Check vehicle service
manual for manufacturer’s specifications
and acceptable pressure ranges.
12. When testing is complete, reinstall
spark plugs and spark plug wires
in proper order. Reconnect ground
(negative) battery cable and coil wires.
13. Store the Kit in its case in a clean, dry,
safe location out of reach of children.