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SKU 94190

For technical questions, please call 1-800-444-3353.

Unpacking

When unpacking, check to make sure the following parts are included.

Cylinder Leakage Tester with Quick Release Chuck

14mm and 18mm Adapters

Adapter Hose

Molded Plastic Case

If any parts are missing or broken, please call Harbor Freight Tools at the number
on the cover of this manual.

About Cylinder Leakage Testing

A Cylinder Leakage Tester can give you valuable information about the engine’s
compression. Pressurized air is supplied to each cylinder, and the rate of leakage
is measured in percent loss from 0% to 100%.

The operator may also locate the source of the compression loss by listening at
these places:

a) Oil dipstick tube for leaking cylinder rings.
b) Radiator fill cap for cylinder wall cracks.
c) Adjacent port for head gasket leaking.
d) Tailpipe for exhaust valve leaks.
e) Carburetor air horn for intake valve leakage.
 f) Fuel injector body for intake valve leakage.

If you are not experienced in doing this type of diagnostic test, the work
should be done by a qualified technician.

Cylinder
Leakage
Tester with
Quick Release
Chuck

14mm and 18mm
Adapters

Adapter Hose

REV 03/07

Summary of Contents for 94190

Page 1: ...y Harbor Freight Tools All rights reserved No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools...

Page 2: ...dren must never be allowed in the work area Do not let them handle machines tools or extension cords 4 Store idle equipment When not in use tools must be stored in a dry location to inhibit rust Alway...

Page 3: ...amaged should be carefully checked to determine that it will operate properly and perform its intended function Any part that is damaged should be properly repaired or replaced by a qualified technici...

Page 4: ...ion Pressurized air is supplied to each cylinder and the rate of leakage is measured in percent loss from 0 to 100 The operator may also locate the source of the compression loss by listening at these...

Page 5: ...eadings Take several readings and average the results for a recorded reading for each cylinder 5 Diagnosing an engine problem with this tool involves using a listening device not included A length of...

Page 6: ...V 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 t...

Page 7: ...adjacent cylinders will show the same problem 3 Adjacent cylinder indicates a damaged head gasket 4 Tail pipe indicates burned stuck or worn exhaust valve 5 Carburetor or fuel injector intake indicate...

Page 8: ...liable for death injuries to persons or property or for incidental contingent special or consequential damages arising from the use of our product Some states do not allow the exclusion or limitation...

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