MotorVac Cool Smoke EVAP Leak Detection System - Manual (Page 11)

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Other Leak Detection Applications
• Vacuum and induction leaks
• Exhaust leaks
• EGR valve leaks
• Oil seals and gasket leaks
• Idle motors and solenoid leaks
• Brake booster leaks
• Component testing (radiators, water pumps and valves)
• Under dash leaks
• Intercooler and turbo charger leaks
• Wind and water leaks (windows & sunroofs)
Vacuum and Induction Leaks
1. Select the correct size cap plug (supplied) to seal the system, but do not seal the system yet.
(You should first fill the system with smoke before you seal the system with the cap plug).
2. It is best to seal the engine’s intake as close to the air inlet 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. For example; wrap the vehicle’s
air filter with plastic wrap and reinstall into the air filter housing and secure. The plastic wrap will prevent
most of the smoke from exiting the intake system, allowing you to create a satisfactory seal in the system
you are testing for leaks. Or you may choose to use a latex rubber glove and a strong rubber band 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.
Ensure that 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 valves are open in the same cylinder at the same time).
3. Select a vacuum line on the engine that is easily accessible and insert the tapered brass nozzle
into this line.
4. 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 with
the smoke flow.
5. Press the SMOKE button on the unit. Allow the system to fully fill with smoke. (30 seconds to 1 minute
is usually sufficient time to fill the induction system).
6. Seal the system with the cap plug once smoke is observed exiting a leak.
7. Use the halogen light supplied to identify the origin of the smoke or use the optional UV Phazer NEO ™
light to look for residual traces of the fluorescent dye that was left behind by the smoke. (PN: 413025)
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