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