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Exterior, Sedan
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Precaution in Repairing High Strength SteelINFOID:0000000001704125
High strength steel is used for body panels in order to reduce vehicle weight.
Accordingly, precautions in repairing automotive bodies made of high strength steel are described below:
HIGH STRENGTH STEEL (HSS) USED IN NISSAN VEHICLES
SP130 is the most commonly used HSS.
SP150 HSS is used only on parts that require much more strength.
Read the Following Precautions When Repairing HSS:
1. Additional points to consider
LIIA2588E
Tensile strength Nissan/Infiniti designation Major applicable parts
373 N/mm
2
(38kg/mm2 ,54klb/sq in)SP130• Front & rear side member assembly
• Front side member closing plate assembly
• Front strut housing
• Lower dash
• Rear seat crossmember
• Other reinforcements
785-1350 N/mm
2
(80-138kg/mm2 , 114-196klb/sq in)SP150• Center pillar reinforcement
(Component part)
• Outer roof side rail reinforcement
(Component part)
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• The repair of reinforcements (such as side members) by heat-
ing is not recommended since it may weaken the component.
When heating is unavoidable, do not heat HSS parts above
550°C (1,022°F).
Verify heating temperature with a thermometer.
(Crayon-type and other similar type thermometer are appropri-
ate.)
• When straightening body panels, use caution in pulling any
HSS panel. Because HSS is very strong, pulling may cause
deformation in adjacent portions of the body. In this case,
increase the number of measuring points, and carefully pull
the HSS panel.
• When cutting HSS panels, avoid gas (torch) cutting if possible.
Instead, use a saw to avoid weakening surrounding areas due
to heat. If gas (torch) cutting is unavoidable, allow a minimum
margin of 50 mm (1.97in).
• When welding HSS panels, use spot welding whenever possi-
ble in order to minimize weakening surrounding areas due to
heat.
If spot welding is impossible, use M.I.G. welding. Do not use
gas (torch) welding because it is inferior in welding strength.
PIIA0115E
PIIA0116E
PIIA0117E
PIIA0144E
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• The spot weld on HSS panels is harder than that of an ordi-
nary steel panel.
Therefore, when cutting spot welds on a HSS panel, use a low
speed high torque drill (1,000 to 1,200 rpm) to increase drill bit
durability and facilitate the operation.
2. Precautions in spot welding HSS
This work should be performed under standard working condi-
tions. Always note the following when spot welding HSS:
• The electrode tip diameter must be sized properly according to
the metal thickness.
• The panel surfaces must fit flush to each other, leaving no
gaps.
• Follow the specifications for the proper welding pitch.
Unit: mm
Rear fender hemming process
1. A wheel arch is to be installed and hemmed over left and right outer wheel house.
2. In order to hem the wheel arch, it is necessary to repair any damaged or defaced parts around outer
wheel house.
CAUTION:
Ensure that the area that is to be glued around outer wheelhouse is undamaged or defaced.
Procedure of the hemming process
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Thickness (t)
Minimum pitch ( )
0.6 (0.024)
0.8 (0.031)
1.0 (0.039)
1.2 (0.047)
1.6 (0.063)
1.8 (0.071)10 (0.39) or over
12 (0.47) or over
18 (0.71) or over
20 (0.79) or over
27 (1.06) or over
31 (1.22) or over
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• Peel off old bonding material on the surface of outer wheelhouse
and clean thoroughly.
• Peel off a primer coat in the specified area where new adhesive is
to be applied on rear fender (the replacing part).
• Apply new adhesive to both specified areas of outer wheelhouse
and rear fender.
• Attach rear fender to the body of the car, and weld the required
part except the hemming part.
• Bend the welded part starting from the center of the wheel arch
gradually with a hammer and a dolly. (Also hem the end of the
flange.)
• Hemming with a hammer is conducted to an approximate angle of
80 degrees.
• Starting from the center, hem the wheel arch gradually, using slight
back and forth motion with a hemming tool.
• Seal up the area around the hemmed end of the flange.
Foam RepairINFOID:0000000001704126
During factory body assembly, foam insulators are installed in certain body panels and locations around the
vehicle. Use the following procedure(s) to replace any factory-installed foam insulators.
URETHANE FOAM APPLICATIONS
Use commercially available spray foam for sealant (foam material) repair of material used on vehicle. Read
instructions on product for fill procedures.
FILL PROCEDURES
1. Fill procedures after installation of service part. 3M automix panel bond 8115,
or any equivalents
SIIA2244E
SIIA2245E
SIIA2246E
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- Remove foam material remaining on vehicle side.
- Clean area in which foam was removed.
- Install service part.
- Insert nozzle into hole near fill area and fill foam material or fill in enough to close gap with the service
part.
2. Fill procedures before installation of service part.
- Remove foam material remaining on vehicle side.
- Clean area in which foam was removed.
- Fill foam material on wheelhouse outer side.
NOTE:
Fill in enough to close gap with service part while avoiding flange
area.
- Install service part.
NOTE:
Refer to label for information on working times.
Hatchback
LIIA1081E
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Sedan
1. Body side outer 2. Front pillar lower reinforcement 3. Body side insulation (foam) front pil-
lar
4. Roof panel assembly 5. Body side insulation (Foam) rear
roof rail6. Rear roof rail assembly
7. Body side insulation strip, center pil-
lar8. Body side insulation strip, rear pillar
lower9. Body side insulation strip, rear pillar
upper
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