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1 Insert set of spacer blocks on undamaged side of roof duct between center roof paneling (1) and side roof paneling and adjust dimension.
So that the center roof paneling (1) can be adapted with the adjusted set of spacer blocks when installing.
2 Mark position on vehicle and dimensions for set of spacer blocks.
3 Expose spot welds on center roof paneling (1) and cut out (areas A and B).
4 Expose spot welds on center roof paneling (1) and drill with Ø 4.8 mm BTR-drill bit (areas B1 and B2).
4.8 x 70 BTR drill bit
gotis://K_58.3_13.0
Drill 4 holes on each side of vehicle.
5 Cut out spot welds on center roof paneling (1) (areas B1 and B2)
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6 Heat center roof paneling (1) in crosshatched areas.
Cross-hatched areas are bonded.
7 Remove damaged center roof paneling (1)
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8 Sand connection surfaces down to bare metal in the cross-hatched areas.
Grind spot weld flanges down to bare metal on both sides.
9 Remove shavings and drill chips.
10 Coat insides of spot weld flanges with zinc dust paint.
Do not coat bonding surfaces with zinc dust paint to prevent adhesion problems (areas C3 and C4).
Observe pretreatment of bonding surfaces.