2006 INFINITI M35 Body

BODY REPAIR
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LOCATION OF PLASTIC PARTS
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Revision: 2006 January2006 M35/M45
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BODY REPAIR
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Revision: 2006 January2006 M35/M45
Precautions in Repairing High Strength SteelNIS00214
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. 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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Revision: 2006 January2006 M35/M45
Read the Following Precautions When Repairing HSS:
1. Additional points to consider
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 (1,022F).
Verify heating temperature with a thermometer.
(Crayon-type and other similar type thermometer are appro-
priate.)
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 possi-
ble. Instead, use a saw to avoid weakening surrounding areas
due to heat. If gas (torch) cutting is unavoidable, allow a mini-
mum 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.
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BODY REPAIR
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Revision: 2006 January2006 M35/M45
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
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Thickness (t) Minimum pitch (l)
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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Revision: 2006 January2006 M35/M45
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
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. 3M automix panel bond 8115,
or any equivalents
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Replacement OperationsNIS00215
DESCRIPTION
This section is prepared for technicians who have attained a high level of skill and experience in repairing col-
lision-damaged vehicles and also use modern service tools and equipment. Persons unfamiliar with body
repair techniques should not attempt to repair collision-damaged vehicles by using this section.
Technicians are also encouraged to read Body Repair Manual (Fundamentals) in order to ensure that the orig-
inal functions and quality of the vehicle can be maintained. The Body Repair Manual (Fundamentals) contains
additional information, including cautions and warning, that are not including in this manual. Technicians
should refer to both manuals to ensure proper repairs.
Please note that these information are prepared for worldwide usage, and as such, certain procedures might
not apply in some regions or countries.

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The symbols used in this section for cutting and welding / brazing operations are shown below.
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