Other Leak Detection Applications - Champion LeakMaster NE240 Operation Manual

Other Leak Detection Applications:

NOTE: While the LeakMaster NE240 is primarily a vehicle fuel evaporative system tester, all
of the following tests can also be performed with the LeakMaster NE240, when Selector
Valve set to 'SMOKE'.
1. Vacuum and induction leaks.
2. Exhaust leaks.
3. EGR valve leaks.
4. Oil seals and gasket leaks.
5. Idle motors and solenoid leaks.
1. Vacuum and Induction Leaks: Select a vacuum line on the engine that is easily accessible and insert
the tapered brass nozzle from the black smoke supply hose into this line. (The supply line to the brake
booster is a good choice when introducing smoke into the intake manifold. It is important to make sure
that you enter this line at a point where the check valve will not interfere). It's a good idea to purge the
intake system by first filling it with smoke before completely sealing it in order to look for the
leak(s). With the engine off, depress the remote push button switch until the system is filled (30
seconds to 1 minute is usually sufficient time for most systems to fill). Once smoke is observed exiting
the intake system, you are ready to completely seal off the intake system.
Seal the system to be tested by selecting the appropriate provided cap-plug that will seal the engine's
air intake. Note: It is best to seal the engine's intake as close to the air inlet origin as possible to inspect
the entire system. This is especially important on engines equipped with mass airflow sensors and
related ducting connecting it to the intake system. If the system you are testing cannot be sealed with
the kit we have provided, it will become necessary to seal the intake by other means. A latex rubber
glove and a strong rubber band are an excellent combination to accomplish this task. Simply stretch the
wrist of the glove around the air passage and secure with the rubber band. You may choose to plug the
tail pipe of the vehicle with the exhaust cone that is provided -- be sure the exhaust cone's hose is also
plugged. (It is possible that smoke pressure can be lost out the exhaust if both an intake and exhaust
valve are open in the same cylinder at the same time). Continue to introduce smoke into the system for
approximately one additional minute or until smoke is seen exiting a leak. Use the halogen light to
highlight and identify the origin of the smoke. Release the push button and begin short pulses to
pinpoint the source of the leak. With the LeakMaster NE240 you will find leaks in places you would
never have thought to look before. So take a good look in and around the engine compartment where
smoke might be escaping.
Carbureted Engines and Typical Leak Sources
6. Brake booster leaks.
7. Component testing (radiators, water pumps and
valves).
8. Under dash leaks.
9. Intercooler and turbo charger leaks.
10. Wind and water leaks (sunroofs and windows).
12