Checking for leaks in the evaporative emission system - B204L
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Checking for leaks in the evaporative emission system - B204L
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1.
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The shut-off valve must still be activated.
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2.
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Detach the line from the EVAP canister purge valve on the intake manifold.
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3.
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Pressurize the system further as described in the Kent-Moore instruction manual.
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4.
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Detect the leak with the Ultrasonic Leak Detector J41416. Start from the line detached from the intake manifold and work through the system's lines and components. Perform a visual inspection at the same time.
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Note
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It may be necessary to lower the tank slightly to be able to check for possible leaks in components on top of the tank.
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Note
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The ultrasonic leak detector is sensitive for ambient noise such as exhaust extractors, pneumatic machines, air nozzles, leaking pneumatic connections, etc.
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The workshop ventilation system can create currents of air that can also affect the equipment.
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Everything mentioned above can cause a similar, but incorrect, result/detection as a leaking EVAP system.
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5.
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Adjust the sensitivity of the detector to filter out interference from the ambient noise.
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Note
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Major leaks such as a defective shut-off valve or loose hose are difficult to detect as they do not have the ”right sound” to be detected by the ultrasonic leak detector.
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Therefore, it is important to perform a visual inspection and component check of the system if there is a quiet leak.
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6.
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When the leak has been detected and rectified, check the integrity of the system again.
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7.
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Restore the car to its original state.
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