2004 DAEWOO LACETTI Section 6

4–2 FRONTNUBIRA/LACETTI
1. FRONT PANEL
1–1. GENERAL DESCRIPTION
.
The front panel is joined to the front wheelhouse and
front longitudinal. It forms the base for the headlampsand other parts and maintains the rigidity of the front
section of the body. Pay particular attention to twists
and parallelism and check mounting of related parts
when welding.
.
Fig. 1 Front Welding Assembly

NUBIRA/LACETTIFRONT 4–3
1–2. REPAIR PROCEDURE
1. Remove the related parts.
S Hood, radiator grill and front bumper.
S Head lamps and fender.
S Engine, radiator and related parts.
S Aircon condenser and related parts.
S Others.
Fig. 2
2. Roughly pull out and straighten the damaged area.
S Check the damage to the front wheelhouse and front
longitudinal before removing the front panel. Use the
frame straightener to roughly pull out and repair the
damaged front panel before removing the front panel.
Note : Check the fit of the door, taking care not to pull
the damaged area out more than necessary.
S Use the horizontal pinch weld clamps and attach the car
to the frame straightener at the clamping points secure-
ly.
3. Keep the body, level.
S Jack up the body, and place safety stands at the four
designated places of the frame door opening.
4. Cut and pry off the front panel.
S Center punch around the spot weld imprints.
S Use the special spot cutter to drill holes at the spot weld
nuggets on the front wheel house and longitudinal.
Note : When drilling holes be careful not to drill down to
the front wheelhouse and longitudinal themselves.
S Cut off the front panel with an air chisel, leaving the weld-
ing flanges intact.
S Level and finish the burrs from the pried off spot welds
with disc sander.
CAUTION : To prevent eye injury, wear goggles or
safety glasses whenever sanding, cutting, or grind-
ing.
Fig. 3
5. Mold damaged related parts.
S Use a hammer and dolly to mold damaged areas of the
front wheelhouse and longitudinal.
S Even out the welding flanges with a hammer and dolly.
S Fill any holes drilled by welding.
Fig. 4
6. Set the front panel.
S Grind both sides of the welding section of the front panel
with a 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 Clamp both the right and left sides with the vise grips as
shown.
S Weld the clamped sections for temporary installation.
CAUTION : To prevent eye injury and burns when
welding, wear an approved welding helmet, gloves
and safety shoes.

NUBIRA/LACETTIFRONT 4–7
2–2. REPAIR PROCEDURE
1. Remove the related parts.
S Parts on passenger side of dash panel lower which are
especially flammable.
S Instrument panel, wiring harness, related parts and oth-
ers.
2. Roughly pull out and straighten the damaged area to
approximately the original shape.
S Attach the car to the frame straightener by tightening the
underbody clamps at the horizontal pinch weld points.
S Before cutting off the damaged sections, pull them out
so that they are restored to the original shape.
S Do not pull out more than necessary.
S Pull out and straighten the damaged areas of the rear
wheelhouse and dash panel lower, front filar and other
parts.
Note : Check the condition of the door and hinges.
Fig. 10
3. Remove the brace wheelhouse.
S Center punch around the spot weld imprints.
S Use the special spot cutter to drill holes at the spot weld
nuggets on the brace wheelhouse.
S Remove the MIG weld areas with a disc sander.
CAUTION : To prevent eye injury, wear goggles or
safety glasses whenever sanding, cutting, or grind-
ing.
Fig. 11
S Using a chisel, pry off the welded flange from the front
body puller and wheelhouse.
4. Peel off the undercoat and sealer.
S Heat the undercoat and sealer at the welding areas of
the wheelhouse and longitudinal with a gas torch and
peel off the undercoat and sealer with a steel spatula.
5. Cut and pry off the front wheelhouse.
S Center punch around the spot weld imprints on the longi-
tudinal and rear wheelhouse.
S Use the special spot cutter to drill holes at the spot weld
nuggets on the center punched areas.
S Cut off the front wheelhouse with an air chisel, leaving
the welding flanges intact.
S Level and finish the burrs from the pried off spot welds
with disc sander.
CAUTION : To prevent eye injury, wear goggles or
safety glasses whenever sanding, cutting, or
grindng.

4–8 FRONTNUBIRA/LACETTI
Fig. 12
NOTE :
S If damage has occurred only front side, cut the damaged
section of the front wheelhouse, trim the new panel to fit
the remaining section, then butt weld both parts at the
inner ends.
6. Mold damaged related parts.
S Fill any holes drilled by welding.
S Use a hammer and dolly to mold damaged areas of the
front longitudinal, rear wheelhouse and other panels.
S Even out the welding flanges with a hammer and dolly.
7. Set the new front wheelhouse panel.
S Grind both sides of the welding section of the front, rear
wheelhouse and front longitudinal with a disc 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 Clamp to the front longitudinal with vise grips and squill
vises.
S Clamp the front panel with vise grips.
Note : Use of jigs is recommended.
S Weld the clamped sections for temporary installation.
CAUTION : To prevent eye injury and burns when
welding, wear an approved welding helmet, glovesand safety shoes.
8. Measure the front compartment diagonally.
S Measure the front compartment diagonally with a track-
ing gauge or convex rule to check it for twisting or bend-
ing.
S Temporarily assemble the fender and hood, then check
the clearances and level differences.
9. Perform the main welding.
S Weld as much as possible with the jig still mounted.
S Perform a trial welding first, and check the welding con-
dition.
S Perform the welding.
Fig. 13
CAUTION : To prevent eye injury and burns when
welding, wear an approved welding helmet, gloves
and safety shoes.
S Increase the number of spot by 20% for areas to be spot
welded.
10. Apply the sealer tape.
S Apply the sealer tape to the hinge and brace wheelhouse
matching area as shown.

4–10 FRONTNUBIRA/LACETTI
3. FRONT LONGITUDINAL
3–1. GENERAL DESCRIPTION
The front longitudinal is joined to the wheelhouse and
front panel, it forms the base for the front suspension,
engine, transmission and others. Therefore, replace-ment of the component affects the front wheel align-
ment and maintains the rigidity of the front section.
When assembling it, either use a jig or follow dimen-
sions on the body repair chart for positioning. It must be
welded carefully.
Fig. 16 Front Longitudinal Welding Assembly

NUBIRA/LACETTIFRONT 4–11
3–2. REPAIR PROCEDURE
1. Remove the related parts.
S Parts to be removed when removing the front panel and
front wheelhouse.
S Parts on passenger side of dash panel lower which are
especially flammable.
S Instrument panel, wiring harness, related parts and oth-
ers.
Note : Remove according to part damaged.
2. Roughly pull out and straighten the damaged area to
approximately the original shape.
S Attach the car to the frame straightener by tightening the
underbody clamps at the horizontal pinch weld points.
S Before cutting off the damaged sections, pull them out
so that they are restored to the original shape.
S Roughly cut off the front longitudinal according to the ex-
tent of damage before roughly pulling out the damage
makes repair of the related parts difficult.
S Do not pull out more than necessary.
Note : Check the condition of the door and hinges.
3. Peel off the undercoat and sealer.
S Heat the undercoat and sealer at the welding areas of
the damaged parts with a gas torch and peel off the un-
dercoat and sealer with a steel spatula.
CAUTION : Be careful not to burn the fittings inside
the passenger compartment when heating.
4. Cut and pry off the front longitudinal.
Note : It’s not necessary to separate the wheelhouse
from the front longitudinal if the wheelhouse is to be re-
placed also.
S Center punch around the spot weld imprints on the
wheelhouse and other related parts.
S Use the special spot cutter to drill holes at the spot weld
nuggets on the center punched areas.
S Cut off the front longitudinal with an air chisel, leaving the
welding flanges intact.
S Level and finish the burrs from the pried off spot welds
with a disc sander.
CAUTION : To prevent eye injury, wear goggles or
safety glasses whenever sanding, cutting, or grind-
ing.
Fig. 17
5. 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 Reshape the wheelhouse and other damaged parts and
even out the welding flanges with a hammer and dolly.
Fig. 18
6. Cut the new front longitudinal to align it with body, then
set the wheelhouse and front panel.
S Cut the new front longitudinal with a hand saw and it will
be butt welded.
S Grind both sides of the welding section of the front longi-
tudinal and wheelhouse with a disc 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 Tighten the new front longitudinal against remaining
parts with the vise grips and pliers.
S Place a jack under the front longitudinal end and support
it, and measure the positions for correct setting.
S Set and clamp the front panel in place with the vise grips.

4–12 FRONTNUBIRA/LACETTI
Note : Use of jigs is recommended for correct positions
and check that the both front longitudinal and wheel-
house are parallel.
S Tack weld the clamped section for temporary installa-
tion.
7. Perform the main welding.
S Weld as much as possible with the jig still mounted.
S Make MIG or gas welds at the butt joints at the front lon-
gitudinal, carefully.
Fig. 19
S Spot weld the wheelhouse with the front longitudinal
flange areas and front panel.
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. 20
S Level the weld beads at the longitudinal butt joints area
with disc sander.
S Make the stiffener(Thickness: 2.8 mm Min., Width: 80
mm) according to the form of longitudinal butt joint areasand weld the stiffener at the longitudinal butt joint areas
with MIG welder.
Fig. 21
8. Finish the welding areas.
S Level the gas or MIG welded areas with disc sander.
S Use a hammer and dolly to even out the wheelhouse and
longitudinal flanges for a close fit.
9. Apply the sealer.
S Apply the sealer to the joint areas of the dash panel lower
and floor panel areas.
10. Apply the undercoat.
S Undercoat to the joint and overlapped areas of the front
floor, longitudinal under side and the inside of front, rear
wheelhouse.
11. 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 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.
12. Coating the anti–rust agents.
S Coating the anti–rust agents to the end of front panel
side and the front door hinge areas.
13. Install the related parts.
S Clean the passenger compartment.
S Wiring harness, instrument panel and related parts.
S Parts of the passenger compartment.
S Chassis components.
S Engine, radiator and related parts.
S Aircon condenser and related parts.
S Head lamps and fenders.
S Heed, radiator grill, and bumper.
S Others.
S Install in the reverse order in which they were removed.

NUBIRA/LACETTIFRONT 4–15
4–2. REPAIR PROCEDURE
1. Remove the related parts.
S Hood, radiator grill and front bumper.
S Door and fender.
S Wiper, cowl and windshield.
S Weatherstrip and pillar trims.
S Instrument panel and wiring harness.
S Carpet and others.
2. Roughly pull out and straighten the damaged area.
S Check the damage to the wheelhouse and roof before
removing the brace wheelhouse and front pillar and de-
termine the extent of the damage.
S Use the frame straightener to roughly pull out and repair
the damaged front pillar before removing the brace
wheelhouse and front panel.
Note : Pull out until the pillar is lined up with the surface
of the windshield and do not pull out more than neces-
sary.
Fig. 23
3. Remove the brace wheelhouse.
S Center punch around the spot weld imprints.
S Use the special spot cutter to drill holes at the spot weld
nuggets on the brace wheelhouse.
S Remove the MIG weld areas with a disc sander.
CAUTION : To prevent eye injury, wear goggles or
safety glasses whenever sanding, cutting, or grind–
ing.
S Using a chisel, pry off the welded flange from the front
body pillar and wheelhouse.
Fig. 24
4. Peel off the undercoat and sealer.
S Heat the undercoat and sealer at the welding areas of
the wheelhouse and longitudinal with a gas torch and
peel off the undercoat and sealer with a steel spatula.
5. Cut and pry off the front pillar.
S Cut off the front pillar along the bold lines as shown in the
figure below with a handsaw and snips carefully.
Note : Be careful not to cut the inner section.
Fig. 25
S Center punch around the spot weld imprints with the rear
wheelhouse, front body pillar inner, rein– forcement front
body pillar inner and floor panel side.
S Use the special spot cutter to drill holes at the spot weld
nuggets on the front pillar.
Note : When drilling holes be careful not to drill down to
the front body pillar inner, reinforcement front body pillar
inner and floor panel side themselves.
S Pry off the remaining flanges from the body with an air
chisel and leaving the welding flanges.
S Level and finish the burrs from the pried off spot welds
with a hammer, dolly and disc sander.