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Erosions on Terrano's roof

I have a 1997 Nissan Terrano. Recently there were erosions on the rooftop at regular distance from each other. Both my mechanic and a car body repair specialist said the erosions were due to a certain type of gum used to attach the interior roof material to the metallic roof. They said this is a very difficult problem to solve.

Without looking at the car itself, I can only suspect that what your mechanic said was correct. There was a time when the sound deadener that was injected between the roof and the cross braces, and also the bonnet and rear boot lid and their internal skins had this problem due to chemical reaction between the deadener and the bare metal.

Usually when you start to see the bubbling in the paintwork, it is too late as the corrosion has gone right through the metal and you need to replace the whole component. You actually cannot solve the problem because you would need to rip out the internal skin or braces and all traces of the deadener. In the end it is easier to replace the whole unit.

 
   
 

Erosions on Terrano's roof

 

 

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