Water Leaks (page 2 of 7)

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.  

Rectifying the leak using recommended tools, auxiliary equipment and materials 

Tools and auxiliary equipment: Dry, absorbent cloths Variable washer nozzle Torch, fluorescent tube Mirror 
Compressed air Seal lip installer Wet/dry vacuum cleaner Sealing compound compressor Remover for interior trim 
Cutter blade or pocket knife Wedge (wood or plastic) Hot air blower Special mirror for concealed leaks Air flow 
checker 

Dry, absorbent cloths  
Variable washer nozzle  
Torch, fluorescent tube  
Mirror  
Compressed air  
Seal lip installer  
Wet/dry vacuum cleaner  
Sealing compound compressor  
Remover for interior trim  
Cutter blade or pocket knife  
Wedge (wood or plastic)  
Hot air blower  
Special mirror for concealed leaks  
Air flow checker  
Sealing compound (tape and plastic compound)  
Multi-purpose sticker  
Clinched flange sealer  
Window sealing compound  
Water shield (PVC)  
Double-sided adhesive tape for water shield  
Methylated spirit (available from trade outlets)  
PU adhesive  
Silicone remover  
Tar remover  

Water leaks according to mileage or running time 

Increasing mileage has an effect on the problem of leaks in a vehicle. Possible influencing factors are: 
 

Servicing and maintenance of seals: No maintenance, lack of maintenance or incorrect maintenance Using an 
incorrect agent 

No maintenance, lack of maintenance or incorrect maintenance  
Using an incorrect agent  

Damaged seals: As a result of aging, wear or incorrect handling/assembly. 

As a result of aging, wear or incorrect handling/assembly.  

Heavy soiling of the vehicle: Heavy soiling of a vehicle can seriously impair the function of water drainage 
channels in particular, and also of rubber seals. 

Heavy soiling of a vehicle can seriously impair the function of water drainage channels in particular, and 
also of rubber seals.  

Age-related factors: Environmental factors UV radiation Extreme climatic conditions 

Environmental factors  
UV radiation  
Extreme climatic conditions  

Corrosion can have a serious impact on bodywork, in particular as a result of: Lightly or heavily rusted seal 
carriers Rusted body seal welds Perforation corrosion 

Lightly or heavily rusted seal carriers  
Rusted body seal welds  
Perforation corrosion