Nissan Altima L32. Manual - part 173

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PRECAUTIONS IN REPAIRING HIGH STRENGTH STEEL

• 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.

• 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.

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PRECAUTIONS IN REPAIRING HIGH STRENGTH STEEL

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• Follow the specifications for the proper welding pitch.

Unit:mm

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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BRM-84

< ON-VEHICLE REPAIR >

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REPLACEMENT OPERATIONS

REPLACEMENT OPERATIONS

Description

INFOID:0000000004205896

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.

REPLACEMENT OPERATIONS

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

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