DAEWOO LACETTI 2004 Service Repair Manual

NUBIRA/LACETTI ROOF, BACK PANEL AND REAR FLOOR PANEL 5–9
3. REAR FLOOR PANEL
3–1. GENERAL DESCRIPTION
The rear floor panel is the base of the rear body and it is
critical for the rigidity of the rear body. During replace-
ment, refer to the body dimension chart or body repair
chart and determine the position to set the rear floor
properly.Be sure that the rear floor is not bent or deformed. Weld
securely to maintain the rigidity of the rear body.
2
Fig. 15 Rear Floor Welding Assembly (NOTCHBACK)

5–10 ROOF, BACK PANEL AND REAR FLOOR PANEL NUBIRA/LACETTI
4
13
1
97 7 911 3 314
Fig. 16 Rear Floor Welding Assembly (HATCHBACK)

NUBIRA/LACETTI ROOF, BACK PANEL AND REAR FLOOR PANEL 5–11
3–2. REPAIR PROCEDURE
1. Remove the related parts.
S Parts to be removed when removing the back panel.
S Rear seat belt and rear seat.
S Muffler, fuel tank and related parts.
S Chassis parts.
S Other related parts.
CAUTION : Do not smoke while working near the
fuel system. Keep open flame away from the fuel
system. If necessary, remove the fuel tank and off
lines.
2. Roughly pull out and straighten the damaged area.
S Check the damage and roughly pull out and re pair the
related back panel, side panel, wheel house inner, rear
longitudinal and other damaged parts with the frame
straightener before remov ing the extension rear floor
panel, rear floor pane and back panel.
S Attach the car to the frame straightener by tightening the
underbody clamps located at the jack up designated
points on the bottom of the frame door opening.
Note : Measure in reference to the dimensions on the
body repair chart.
3. Cut and pry off the back panel.
S The back panel to be cut and pried off when removing
the back panel.
4. Cut and pry off the rear floor and extension rear floor
panel.
S Cut off the rear floor and extension rear floor with a gas
torch or air chisel leaving the spot welded flanges of the
rear longitudinal along the bold line in the figure below.
Note : Cut the rear floor 15mm(0.59in.) from welded
flange of the cross member rear seat.
S Center punch around the spot weld imprints with the rear
longitudinal, extension rear longitudinal and web plate.
S Use the special spot cutter to drill holes at the spot weld
nuggets on the center punched areas.
Fig. 17
Fig. 18
Note : When drilling holes be careful not to drill down to
the rear longitudinal, extension rear longitudinal and
web plate themselves.
S Cut and pry off the remaining rear floor and extension
rear floor panel with an air chisel, leaving the welding
flanges intact.
S Level and finish the burrs from the pried off spot welds
with disc sander and repair all cracks, holes or other de-
fects by welding also repair the rear longitudinal and ex-
tension rear longitudinal if necessary.
CAUTION : To prevent eye injury, wear goggles or
safety glasses whenever sanding, cutting, or grind-
ing.
Fig. 19
5. Peel off the undercoat and sealer.
S Heat the undercoat and sealer at the welding areas with
a gas torch and peel off the undercoat and sealer with
a steel spatula.
6. Mold damaged related parts.
S Use a hammer and dolly to mold damaged areas of the
rear longitudinal and extension rear longitudinal.
S Even out the welding flanges with a hammer and dolly.
S Fill any holes drilled by welding.

5–12 ROOF, BACK PANEL AND REAR FLOOR PANEL NUBIRA/LACETTI
CAUTION : To prevent eye injury and burns when
welding, wear an approved welding helmet, gloves
and safety shoes.
S Level and finish the burrs from the pried off spot welds
with disc sander.
S Sand off the paint and undercoat from both sides of the
flange to be welded.
7. Cut the new rear floor to align it with the body, then set
the new rear floor and extension rear floor.
S Cut the new part so it overlaps the cross member rear
seat by approximately 40mm(1.57in.).
Fig. 20
S Grind both sides of the welding section of the rear floor
and extension rear floor with a disk sander to remove the
paint and expose the steel plate.
CAUTION : To prevent eye injury, wear goggles or
safety glasses whenever sanding, cutting, or grind-
ing.
S Set and clamp the new panel in place with the vise grips.
Note : Use of jigs is recommended for correct positions
and check that the both rear logitudinal is parallel.
S Tack weld the clamped section for temporary installa-
tion.
CAUTION : To prevent eye injury and burns when
welding, wear an approved welding helmet, gloves
and safety shoes.S Remove the vise grips and temporarily install the rear
panel, then check the alignment, level differences and
outer appearance.
8. Remove the main welding.
S Weld the rear floor and cross member rear seat with a
MIG welder fillet weldings as shown.Fig. 21
S Spot weld the rear floor and extension rear floor with rear
longitudinal flange areas and web plate flanges as
shown.
CAUTION : To prevent eye injury and burns when
welding, wear an approved welding helmet, gloves
and safety shoes.
S Perform a trial welding first, and check the weld ing con-
dition.
S Increase the number of spot by 20% for areas to be spot
welded.
9. Weld the back panel
S The back panel to be welded when replacement the
back panel.
10. Finish the welding area.
S Level the MIG welded areas with a disc sander, then
even out high areas with a hammer being careful not to
deform them.

NUBIRA/LACETTI ROOF, BACK PANEL AND REAR FLOOR PANEL 5–13
CAUTION : To prevent eye injury, wear goggles or
safety glasses whenever standing, cutting, or
grinding.
Fig. 22
S Use a hammer and dolly to even out the spot welded
areas for a close fill the flange surface together.
11. Apply the sealer.
S Apply the sealer at the overlapped areas of the rear floor
and extension rear floor, and welded surfaces of the
matching panel and all sealing gaps completely.
12. Apply the undercoat.
S Undercoat to the rear wheelhouse and designated rear
floor.
13. Apply the paintCAUTION
S Ventilate when spraying paint. Most paint contains sub-
stances that are harmful if inhaled or swallowed. Read
the paint label before opening paint container.
S Avoid contact with skin. Wear an approved respirator,
gloves, eye protection and appropriate clothing when
painting.
S Paint is flammable. Store in a safe place, and keep it
away from sparks, flames or cigarettes.
14. Apply the deadner.
S Clean the passenger and trunk compartment.
S Apply the deadner to the surface of rear floor and exten-
sion rear floor.
Fig. 23
15. Install the related parts.
S Install in the reverse order in which they were removed.
16. Check and adjust
S Check clearances and level differences.
S Check the trunk locking and unlocking condition.
S Check all operation.
S Check for water leaks in the trunk compartment.
Note : Use specified check sheet for operation check
properly.

NUBIRA/LACETTI FRAME DOOR OPENING, DOOR AND SIDE PANEL OUTER 6–1
SECTION 6
FRAME DOOR OPENING, DOOR AND SIDE
PANEL OUTER
CONTENTS
1. FRAME DOOR OPENING 6 – 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1.GENERAL DESCRIPTION6–2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.REPAIR PROCEDURE6–3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. DOOR 6 – 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.REPAIR PROCEDURE6–6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. SIDE PANEL OUTER 6 – 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.GENERAL DESCRIPTION6–8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.REPAIR PROCEDURE6–10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6–2 FRAME DOOR OPENING, DOOR AND SIDE PANEL OUTER NUBIRA/LACETTI
1. FRAME DOOR OPENING
1–1. GENERAL DESCRIPTION
The frame door opening consist of frame door area and
side outer area. It forms the base for the front, rear
doors and other parts and maintains the rigidity of thedoors and roof. The frame door opening area should,
depending on the degree of damage, be repaired as
much as possible rather than repalced.(Repair by pull-
ing out)
Fig. 1 Frame Door Opening Welding Assembly

NUBIRA/LACETTI FRAME DOOR OPENING, DOOR AND SIDE PANEL OUTER 6–3
1–2. REPAIR PROCEDURE
1. Remove the related parts.
S Doors.
S Weather strips, pillar trims and related parts.
S Carpet.
S Seat belt assembly
S Door switch and wiring harness.
S Fuel pipe and brake oil pipe.
S Other related parts.
Note : Pull out and straighten the damaged area to
approximately the original shape.
2. Remove the related parts.
S Damage may extend to the inner roof frame, the inner
frame door opening and the floor. Determine the extent
of the damage first, so the frame can be pulled out prop-
erly.
Note : Use heat–resistant protective cover for protect
painting areas, seats, carpets and other parts.
S Pull out and straighten the damaged areas.
S Do not pull out more than necessary.
3. Cut and pry off the frame door opening.
S Check the damage on the frame door opening, then cut
the new frame door opening so it will overlap by
30mm(1.18in.) in the pillar, front and rear.
S Cut the damaged area with a hand saw along the bold
line as shown.
Note : Be careful not to cut the inner panel. This could
result in extensive repair.
Fig. 2
S If the damage involves part of the center pillar, cut them
as shown.
Fig. 3
S Center punch around the spot weld imprints on the
welded flange.
S Use the special spot cutter to drill holes at the spot weld
nuggets.
Note : When drilling holes be careful not to drill down to
the inner panel..
S Pry off the frame door opening panel with an air chisel,
leaving the welding flanges intact.
CAUTION : To prevent eye injury, wear goggles or
safety glasses whenever sanding, cutting, or grind-
ing.
4. Mold damaged related parts.
S Fill any holes drilled by welding.
CAUTION : To prevent eye injury and burns when
welding, wear an approved welding helmet, gloves
and safety shoes.
S Use a hammer and dolly to mold damaged areas of the
remaining inner panel and even out the welding flanges.
S Level and finish the burrs from the pried off spot welds
with disc sander.
S Sand off the paint and undercoat from both sides of the
flange to be welded.
5. Set the new frame door opening.
S Grind both sides of the welding section of the prepared
frame door opening part with a disk sander to remove
the paint and expose the steel plate.
S Clamp the new panel in place with the vise grips.
S Tack weld the clamped section for temporary installa-
tion.
CAUTION : To prevent eye injury and burns when
welding, wear an approved welding helmet, gloves
and safety shoes.

6–4 FRAME DOOR OPENING, DOOR AND SIDE PANEL OUTER NUBIRA/LACETTI
Fig. 4
S Remove the vise grips and temporarily install the fender
and doors, then check the clearances, level differences
and outer appearance.
6. Perform the main welding.
S Weld the front, rear frame door opening and center pillar
at the butt joints with a gas or MIG welder.
S Spot weld the frame door opening and center pillar as
shown.
CAUTION : To prevent eye injury and burns when
welding, wear an approved welding helmet, gloves
and safety shoes.
S Perform a trial welding first, and check the welding con-
dition.
S Increase the number of spot by 20% for areas to be spot
welded.Fig. 5
7. Finish the welding areas.
S Level the gas or MIG welded areas with a disc sander,
then even out high areas with a hammer being careful
not to deform them.
CAUTION : To prevent eye injury, wear goggles or
safety glasses whenever sanding, cutting, or grind-
ing.
S Use a hammer and dolly to even out the spot welded
flanges for a close fit with the surface of the frame door
opening panel.
S Fill in deformations and level differences of the welded
areas with solder or putty, then finish.
8. Apply the sealer.
S Apply the sealer to the matching surfaces of the floor
and frame door opening.
9. Apply the undercoat.
S Undercoat to the front floor.
10. Apply the paint.
CAUTION
S Ventilate when spraying paint. Most paint contains sub-
stances that are harmful if inhaled or swallowed. Read
the paint label before opening paint con tainer.
S Avoid contact with skin. Wear an approved respirator,
gloves, eye protection and appropriate clothing when

NUBIRA/LACETTI FRAME DOOR OPENING, DOOR AND SIDE PANEL OUTER 6–5
painting.
S Paint is flammable. Store in a safe place, and keep it
away from sparks, flames or cigarettes.
11. Coating the anti–rust agents.
S Coating the anti–rust agents to the inside of frame door
opening areas sufficiently.
Fig. 6
12. Install the related parts.
S Clean the passenger compartment.
S Wiring harness and related parts.
S Seat belt assembly and carpet.
S Trims and weather strips.
S Door and others.
S Install in the reverse order in which they were removed.
13. Check and adjust.
S Check clearances and level differences.
S Check the door locking and unlocking condition.
S Check for water leaks in the passenger compartment.