1997/98 Chevrolet Corvette
Collision Repair
3-3
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Fig.␣ 3.5 — Weld Perimeter of Joint, as Indicated
Fig.␣ 3.4 — Remove Remaining Portion
of Impact Bar in Frame Rail
Front Bumper Impact Bar
— INSTALL OR CONNECT —
1
Straighten and deburr the rail ends as
necessary to allow the service impact bar to
fit properly.
2
Temporarily position the impact bar and
scribe lines into the primer indicating where
the welds will be made. Remove the primer
from the areas to be MIG welded by sanding
with 80-grit paper on a ‘Dual-Action’ sander
(DA). Do Not use a grinder to remove the
primer.
3
Prepare all bare metal surfaces and apply
weld-through primer as necessary. Be sure to
apply primer to the inside of the ‘fishmouth’
area also.
Notice: When installing the replacement
bumper bar, weld the sides first in order
to ensure uniform contact with the frame
rails.
4
Position the bumper impact bar using
three-dimensional measuring equipment and
install per the original weld locations. Stitch
weld around the ‘fishmouth’ joint. If no trace
of the original welds are present, use Fig.␣ 3.5
as a guide for welding the side rails to the
impact bar. This weld pattern will create a
solid weld joint with minimal heat distortion.
5
Clean and prepare all welded surfaces, use
3M’s Scotch-Brite Clean-N-Strip Discs (disc
PN 07460, mandrel P/N 07491) or equivalent.
IMPORTANT: Prior to refinishing, refer to
GM P/N 4901 M-D Refinish Manual for
recommended products.
6
Apply approved anti-corrosion primer. Do
not combine paint systems. Refer to paint
manufacturer’s recommendations.
7
Install all related panels and components.