Chevrolet 1997 Corvette, Полное руководство, Страница: 35 / 41

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1997/98 Chevrolet Corvette Collision Repair
Rear Bumper Impact Bar
Fig.␣ 3.71 — Cut and Remove
Left and Right Corners (Right Corner Shown)
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Fig.␣ 3.72 — Create Windows to Access Welds
FRT
Fig.␣ 3.73 — Bond Between Beam and Tub
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4 Using a die grinder or equivalent, cut the
MIG welds attaching the rear impact bar to
the frame rails. Cut the welds around the
perimeter of the frame rail (fishmouth) ends.
Cut the welds favoring the impact bar side of
the joint. DO NOT cut into the frame rails.
Notice: The top and bottom welded
edges, as well as the outer rail welds are
accessible from outside the vehicle
(Fig.␣ 3.70).
Caution: DO NOT cut the rails when
cutting ‘windows’ in the rear compartment
panel.
5 Access to the inner rail welds require
modification to the rear wall of the SMC rear
compartment panel. From inside the vehicle
locate, mark, and cut out ‘windows’ in the
rear compartment panel as in Fig.␣ 3.71. The
‘windows’ provide access to inner MIG welds
attaching the impact bar to the rails
(Fig.␣ 3.72).
Important: Save the cutouts for
re-installation.
6 Cut the remaining welds around the
perimeter of the impact bar, favoring the
impact bar side of the joint.
Notice: Be sure to protect the interior of
the vehicle before cutting or grinding the
SMC body, or the bumper impact bar.
7 The rear impact bar is also bonded to the
rear compartment panel, see Fig.␣ 3.73. If
necessary, apply heat, then pry apart to
separate impact bar from rear panel.
(Refer
to Rear Compartment Panel Service
Procedures.)
With the rear bumper impact bar removed, repair
any cracks in the SMC from outside the vehicle.
(Refer to SMC Repair Procedures.)
Important: Do not install the ‘windows’ in rear
compartment yet; welding access is necessary
for installing the replacement impact bar.
— INSTALL OR CONNECT —
1 Straighten and deburr the rail ends as
necessary to allow the service bumper impact
bar to fit the rail ends properly. Remove any
adhesive which is cracked or broken loose
from the rails or the rear compartment panel.