Nissan Armada 2025-2026 Service and Repair Manual: How to Heat Sheet Metal

• Use a carburizing flame when shrinking sheet metal with a gas welding torch.

  

• Hold the torch at a right angle to the center of the sheet metal.

• Maintain a distance of 3 mm - 5 mm (0.12 in - 0.20 in) between the inner core and sheet metal.

• Heat the sheet metal to approximately 800°C (1,472°F) (until the heated portion turns red). Increase the temperature if sheet metal stretching is insufficient.

• Locate the stretched portion of the panel.

  

  Press the surface being repaired in several places.

  The point where the largest elastic dent is formed is the center, where the stretch is the maximum. The highest portion of the panel being repaired can also be considered the most stretched portion.

• The area heated with a welding torch must be approximately 3 mm - 5 mm (0.12 in - 0.20 in) in diameter if the panel shape is complex, and approximately 6 mm - 15 mm (0.24 in - 0.59 in) in diameter if it is flat.

  

• Small stretch

• Apply a dolly to the back of the heated panel. Tap the panel with a wooden hammer using the hammer-ondolly method in the sequence shown in the figure.

  (A) and (B) → 1 - 8

  (C) → 9

• Excessive stretch

  

  Shrink the panel, starting with the most stretched portion, and proceed toward the edge of the dent so that the dent surface is lower than the original surface.

  Using a gas welding torch makes the panel concave.

  To correct this, strike the concave portion using the hammer-on-dolly method to stretch the panel bit by bit until the original surface is restored.

• Apply wet cloths to the shrunken portion of the panel to cool it quickly.

© 2014-2026 Copyright www.niarmada.com

 
0.0052