Practical Execution Of Tests And Checks

Water test 

• Carry out the water test with a second person present (passenger compartment).
• Use variable washer nozzles (concentrated water jet to fine spray mist).
• Start in the lower section and spray the whole area, working upwards in stages.

Washer test 

• Further tests can be carried out in the washer system.
• Some leaks originate here, or only occur here.
• The relevant passenger compartment should be checked using a torch during the wash procedure.

Road test 

• If no leaks are located during the tests above, road tests should be carried out on wet roads.
• Road tests under various conditions:
• At various speeds.
• On various road surfaces (asphalt to cobbles).
• With loaded or unloaded vehicle.
• Driving through puddles (splash water).

Chalk test (powder test) 

• In this test, the clamping load and the bearing surface of the seal are checked.
• Performing the test:
• Dust the door seal with powder or coat with chalk.
• Coat the bearing surface of the seal with a thin film of grease.
• Slowly close the door and open it again.
• Check the width and continuity of the imprint on the door seal.

Other test equipment 

• Other equipment such as stethoscopes, UV lamps, special mirrors or ultrasound measuring instruments can be used to locate leaks.