Tracing Powder or Chalk Test

Clean the weatherstrips and the contact surfaces with cleaning solvent.

1. 1
   Apply powder or chalk in an unbroken line to the contact surface of the weatherstrip surrounding the perimeter of the suspected areas.
2. 2
   Close the panel completely without slamming the panel. Closing the panel completely presses the weatherstrip firmly against the mating surface.
3. 3
   Inspect the applied line on the weatherstrip. The applied line is marred where contact is good. A corresponding imprint is on the mating surfaces.
4. 4
   Gaps or irregularities in the powder or the chalk line on the mating surfaces indicate the areas with a poor seal.

Air Pressure Test

1. 1
   Mask off both the pressure relief valves.
2. 2
   Close all the windows.
3. 3
   Turn the vehicles ventilation fan to the on position, with the selector on high speed and in the defrost mode.
4. 4
   Unlock and close the doors.
5. 5
   Listen for escaping air along the door and the window seals with a stethoscope or a length of heater hose.

Soap Suds or Bubble Test

1. 1
   Mask off the pressure relief valves.
2. 2
   Close all the windows and the doors.
3. 3
   Turn the vehicles ventilation fan to the on position, with the selector on high speed and in the defrost mode.
4. 4
   Unlock and close the doors
5. 5
   Apply the soap solution to the potential leak areas.
6. 6
   Look for bubbles revealing escaping air.