Mitsubishi MOTORS Lancer Evolution 2008, Body Repair Manual, Page: 161 / 186

ALUMINUM PANEL
TSB Revision
WELDED PANEL REPLACEMENT
3-53
3. Straightening: Remove distortion by the draw correction
procedure with a flattening hammer and a burner.
CAUTION
•
The heating temperature should be approximately
250
°
C (482
°
F).
•
Pay particular attention to heating, because it is melted
without discolouration by heat.
•
Cover the vicinity of the area to be heated with a wet
rag or the like to prevent temperature rise and influence
of heat (distortion).
•
Do not use a draw hammer for steel sheets because it
may cause the panel crack.
4. Sanding: Grind the surface with a disk sander or a
double-action sander.
•
Disk sander: #100 to #120
•
Double-action sander: #150 to #180
CAUTION
Aluminum plates are softer than steel sheets, therefore
select an appropriate abrasive to prevent the surface from
deeply scratched. The heating temperature should be
approximately 250
°
C (482
°
F).
.
Correction of cuts and cracks
If cuts, cracks, or holes occur in a steel sheet panel, MIG weld-
ing with CO
2
is used for repair. However, for an aluminum
panel, use MIG or TIG welding with argon gas (inert gas) as
shielding gas for repair.
.
DEGREE OF DISTORTION CAUSED BY WELDING
Gas welding (a large amount of distortion) TIG welding MIG
welding (a small amount of welding). This manual explains the
operation procedure of MIG welding which causes a small
amount of distortion by welding heat.
Operation procedure of MIG welding
.
CAUTION
•
Be careful to avoid excessive stretch of or damage to
the panel.
•
Minimize the gap of the butt joint.
1. Correct the damaged area by hammering lightly while
heating it. If any area is stretched by hammering, grind it off
with a pneumatic saw.
AB202116AB
AB202109 AC
AB302173 AB
AB202121AB