Infiniti QX56 (Z62). Manual - part 169

BODY EXTERIOR PAINT COLOR

BRM-3

< VEHICLE INFORMATION >

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• RM, RPM: Multi flex color

• TPM: Titanium pearl metallic

• TM: Micro titanium metallic

• PM: Pearl metallic

BRM-4

< PRECAUTION >

REPAIRING HIGH STRENGTH STEEL

PRECAUTION

REPAIRING HIGH STRENGTH STEEL

High Strength Steel (HSS)

INFOID:0000000006248484

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:

Read the following precautions when repairing HSS:

1.

Additional points to consider

Tensile strength

Major applicable parts

440 - 780 MPa

• Rear floor reinforcement
• 2nd seat mounting member assembly
• Front seat mounting rear crossmember assembly
• Front floor reinforcement
• 2nd crossmember (Lower)
• Side radiator core support
• Radiator core support main assembly
• Front side member assembly
• 4th crossmember
• 2nd seat mounting crossmember
• Rear side member
• Rear crossmember
• Inner side roof rail
• Upper inner front pillar
• Inner center pillar
• Upper front pillar reinforcement
• Lower center pillar brace
• Front pillar brace
• Outer sill reinforcement
• Front roof rail
• Rear roof rail
• Radiator guard crossmember assembly
• 2nd crossmember assembly
• 2nd crossmember reinforcement
• Front side member assembly
• Front bound bumper bracket assembly
• Lower front link mounting bracket assembly
• Center side member assembly
• Fuel tank protector assembly
• Rear suspension mounting bracket assembly
• Rear shock absorber bracket assembly
• Rear side member assembly
• Rear end gusset
• Rear end crossmember assembly

980 - 1350 MPa

• Lower dash center reinforcement

(Lower dash Component part)

• Inner sill
• Rear seat crossmember

(2nd seat mounting crossmember component part) 

• Inner center pillar (Upper)
• Upper outer center pillar reinforcement

(Lower center pillar brace component part) 

• Front bumper crossmember assembly

REPAIRING HIGH STRENGTH STEEL

BRM-5

< PRECAUTION >

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• The repair of reinforcements (such as side members) by heat-

ing is not recommended, because it may weaken the compo-
nent. When heating is unavoidable, never 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 sections 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 (1.97 in).

• 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 MIG. welding. Do not use
gas (torch) for welding because it is inferior in welding
strength.

• Spot welding on HSS panels is harder than that of an ordinary

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.

PIIA0115E

PIIA0117E

PIIA0144E

PIIA0145E

BRM-6

< PRECAUTION >

REPAIRING HIGH STRENGTH STEEL

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 (in)

Handling of Ultra High Strength Steel Plate Parts

INFOID:0000000006248485

PROHIBITION OF CUT AND CONNECTION

Never cut and joint the lower lock pillar reinforcement (center pillar reinforcement inside frame parts) because
its material is high strength steel plate (ultra high strength steel plate). 
The center pillar reinforcement must be replaced if this part is damaged. 

PIIA0146E

PIIA0147E

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 more
12 (0.47) or more
18 (0.71) or more
20 (0.79) or more
27 (1.06) or more
31 (1.22) or more

JSKIA0781ZZ