Nissan Armada 2025-2026 Service and Repair Manual: Condition of the Panel
Before beginning, thoroughly check the panel and make any necessary corrections.
(1) CLEARANCE BETWEEN WELDING SURFACES
Gaps between the surfaces to be welded cause poor current flow. Even if welding could be done without removing such gaps, the welded area would be smaller, resulting in poor strength.
Flatten the two surfaces to remove the gaps, and clamp them tightly before welding.
Assessment of spot-weld areas
Before body components are actually joined, it must be ensured that every welding surface to be joined meets the strength requirements and is adequate for the accident safety resulting from these. To this end, test welds can be made on offcuts of the replacement part that are not required. The results of the welding can also be used for fine adjustment of the spot-welding apparatus, if necessary.
| Weld | Feature | Explanation |
| Welding spot OK | |
| Weld penetration too deep, heat affected zone too great | Excessive build-up of heat due to raised welding current or excessive welding time. |
| Misshapen contact point | Contaminated electrode tip. The distorted resistance measurement caused by this leads to incorrect welding parameters and, as a result, to reduced connection strength. |
| Surface damage | Excessive contact resistance due to insufficient contact pressure electrodes. |
In addition to the visual assessment of the welding spots, a peel test must also be performed. To do this, the metal sheets that were previously joined with a welding spot are separated by peeling. During this test the welding spot must be pulled out of one of the two metal sheets completely. The size of the welding spot must have a certain minimum diameter.
Ø nugget > 4 x √ sheet thickness (thinnest sheet of connection). An approximate value for the diameter of the peel test can be found in the following table.
| Sheet thickness in mm | 0.8 | 1.0 | 1.2 | 1.6 |
| Diameter of weld nugget in mm | 3.6 | 4.0 | 4.4 | 5.0 |
(2) PANEL SURFACES TO BE WELDED
Paint, rust, dust, or any other contamination on the panel surfaces to be welded cause insufficient current flow and poor results.
Remove such foreign matter from the surfaces to be welded by sanding or wiping clean.
(3) CORROSION PREVENTS PROPER WELDING OF PANEL SURFACES.
Coat the surfaces to be welded with an anticorrosion agent that has high conductivity.
It is important to evenly apply the agent to the panel including the end face.
Perform the spot welding before the anticorrosion agent gets dry, as the agent has generally low conductivity.
Because the wet agent can move from the welding portion due to the welding pressure, that leads to the good quality of spot welding by high conductivity.
Process of Spot Welding
It takes 3 processes, “pressurization”, “energization”, and “retention”, to complete the spot welding.
(1) PRESSURIZATION
The welding points of overlapped panels are pressurized with the t ...
Precautions when Performing Spot Welding
(1) SELECTION OF SPOT WELDING MACHINE
Use the direct welding method whenever possible.
(When direct welding cannot be applied, use MAG plug welding.)
(2) APPLICATION OF ELECTRODE TIPS
Apply electrode ...
Other materials:
Adjustment
WIPER BLADE POSITION ADJUSTMENT
Set rear wiper blade as set position mark.
Rear wiper blade Back door window glass Set position mark ...
Exploded View
WITHOUT ELECTRIC MOTOR
Steering column assembly Upper joint : N·m (kg-m, ft-lb)
WITH ELECTRIC MOTOR
Steering column assembly Upper joint : N·m (kg-m, ft-lb) ...
Exploded View
Front output shaft Front oil seal Front case Snap ring Sprockets with chain Snap ring Rear case : Always replace after every disassembly. : N·m (kg-m, ft-lb) : Apply transfer fluid. : Apply Genuine Liquid Gasket, Loctite 598 or equivalent. ...
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