Volkswagen Touran Service Manual: Fold Corrosion Servicing Notes

Corrosion on the Fold Edges, for Instance on the Hood, Door or also the Rear Lid

Remove the corroded areas with → Chapter "Pneumatic Brush Grinder Set -VAS6446-" or → Chapter "Brush Grinder Set -VAS6776-".

Sand the overlapping areas with P360 - P400 sandpaper.

Clean the base surface with Silicone Remover.

After a corrosion repair and before sealing, insulate the base surface with Two-Part Wash Primer -LHV 043 000 A2- and then fill with Two-Part HS Performance Filler.

After the filler has dried, the filled area must be dry sanded with P400- P500. While doing so, make sure to avoid "sanding through". Then clean the sanded areas with Silicone Remover.

After the filler has dried and has been sanded, the metal edges in the fold area must be thinly sealed with a fine seam sealant. Refer to → Chapter "Sealing Materials". The fine seam sealant must match the original state. Refer to → Paint; Rep. Gr.00.

Note When repairing, the seam sealant is to be returned to replicate stock visual appearance and layer thickness. Sealing seams near attachments to be installed must be applied smoothly In order to avoid damage and malfunctions.

Water drain holes must remain free.

All threaded pins and weld nuts with M-threads, as well as all other pins and contact surfaces for the assembly must be functional after the sealant application. The sealing material cannot be applied on blank sheet metal, but rather on filled surfaces.

Recreate the subsequent paint system according to the manufacturer's specifications.

Seal the cavities around the fold area with → Chapter "Suction Feed Spray Gun -VAG1538-". Refer to → Chapter "Preservation".

Note Service work is effective only when the fold area can be sealed airtight from the inside (so that no moisture can get in).