Rocker Panel

Complete removal and replacement of the rocker panel on a 2005 Dodge Viper, including door, sill trim, and outer body panel work.

Warnings

Tools required

Parts

• Rocker panel outer skin (left or right side as needed) × 1 — Use OEM specification or certified aftermarket body panel
• Door sill trim plate × 1 — Reuse if undamaged, OEM replacement if needed
• Body seam sealer × 1 — Mopar body seam sealer or equivalent
• Weld-through primer × 1 — Zinc-rich weld-through coating
• Paint and primer matched to vehicle color × 1 — Use OEM paint code

Preparation

1. Park vehicle on level surface and set parking brake
2. Disconnect negative battery cable and wait 2 minutes for airbag system to discharge
3. Raise and support vehicle securely on jack stands at appropriate lift points, ensuring side being repaired is accessible
4. Remove wheel on the side being repaired to access rocker panel fully
5. Photograph panel alignment and gaps at door, quarter panel, and front fender for reference during reassembly
6. Protect adjacent panels (door, fender, quarter panel) with masking or welding blankets to prevent heat damage

Procedure

1. 1

   Remove Door Sill Trim and Interior Access
   Open the door on the side being repaired. Locate and remove the door sill trim plate by carefully prying up from the front edge using a trim removal tool. The trim is typically retained by 3-4 clips along its length. Once loosened, slide forward and lift out. Pull back the edge of the carpeting to expose the inner rocker panel flange and any visible spot welds or fasteners from the interior side.
2. 2

   Mark Panel Locations and Alignment Points
   Using a scribe or body marking pen, mark the exact position where the rocker panel meets the front fender, door opening, and rear quarter panel. Mark alignment reference points on the door jamb and rocker panel that can be used to ensure proper positioning of the replacement panel. These marks are critical for maintaining door fit and body line continuity.
3. 3

   Remove Door for Access
   Support the door with a floor jack or assistant. Remove the door hinge bolts securing the door to the space-frame hinge points. Verify exact hinge locations and bolt count against Mopar service documentation for the 2005 Viper before removal. Carefully lift the door away from the vehicle and store safely. This provides full access to the rocker panel and prevents door damage during cutting and welding operations.
4. 4

   Locate and Document Spot Welds
   Inspect the rocker panel from both exterior and interior (through door opening). The outer rocker panel skin is typically spot-welded to the inner rocker structure along the top flange (below door opening) and bottom flange (under vehicle). Count and mark all visible spot welds with a paint marker. The Viper composite rocker/sill has no spot welds; document actual fastener and bond locations per Mopar service documentation before removal. Also check for spot welds at the front and rear ends where the panel overlaps the fender and quarter panel structures.
5. 5

   Drill Out Top Flange Spot Welds
   NOTE: The 2005 Viper rocker/sill is a composite panel bonded and mechanically fastened to the steel space frame — there are no spot welds. Do not drill for spot welds. Instead, remove mechanical fasteners and release adhesive bonds per Mopar composite body repair procedure.
6. 6

   Drill Out Bottom Flange Spot Welds
   NOTE: The Viper does not have a conventional stamped-steel floor pan with spot-welded rocker flanges. The lower rocker/sill attaches to the tubular space frame via fasteners and adhesive; there are no spot welds to drill. Follow Mopar body repair procedure for the composite sill.
7. 7

   Separate Panel at Front and Rear Terminations
   At the front end where the rocker panel meets the front fender/cowl area, use the spot weld cutter to separate any spot welds or seam welds. At the rear where the panel meets the quarter panel, carefully cut or drill out the joining welds. If the panel is continuous with either component, use an air cut-off tool to make a clean vertical cut at the factory seam location, following your alignment marks.
8. 8

   Remove Damaged Rocker Panel
   With all spot welds drilled and end connections separated, carefully pry the outer rocker panel skin away from the inner structure using a flat pry bar. Work gradually along the length to avoid bending the inner structure. Remove the damaged panel completely and set aside. Inspect the inner rocker structure for any damage, rust, or deformation that would require additional repair before installing the replacement panel.
9. 9

   Prepare Mating Surfaces
   Using a wire brush, grinder, or sandpaper, clean all remaining spot weld material from the inner rocker flanges until surfaces are flat and smooth. Remove all rust, old sealer, and paint from areas that will be welded. Treat any surface rust with rust converter or treatment as needed. The mating surfaces must be bare metal for proper welding. Apply weld-through primer to all bare metal surfaces that will be welded to prevent future corrosion.
10. 10

    Test Fit Replacement Panel
    Position the new rocker panel in place and clamp at multiple points along its length using panel clamps or welding magnets. Check alignment with your scribed reference marks at the door opening, fender, and quarter panel. Verify that the panel sits flush with adjacent body lines and that door gaps will be correct. Use panel alignment pins or drift punches through existing holes to ensure proper positioning. Make any necessary adjustments before welding.
11. 11

    Weld Replacement Panel - Top Flange
    With the panel properly aligned and clamped, begin plug welding the top flange to the inner rocker structure. Starting at the center and working toward the ends, create plug welds at the same locations as the original spot welds (approximately every 2-3 inches). After every 2-3 welds, allow the panel to cool and recheck alignment to prevent warping from heat. NOTE: The Viper rocker/sill is composite, not steel — MIG welding does not apply. Use the appropriate structural adhesive/bonding and mechanical fastening method per Mopar composite body repair specification.
12. 12

    Weld Replacement Panel - Bottom Flange
    Working from underneath the vehicle, plug weld the bottom flange to the floor pan structure at the original spot weld locations. Maintain consistent weld spacing and allow cooling time between welds to prevent panel distortion. Verify panel alignment periodically during welding process.
13. 13

    Weld Front and Rear Terminations
    At the front connection to the fender/cowl area, create a seam weld or series of plug welds matching the original factory joint method. At the rear connection to the quarter panel, weld the joint using the same technique. If a butt joint was cut at either location, create a continuous seam weld with appropriate penetration, then grind smooth to match surrounding contour.
14. 14

    Finish Welded Surfaces
    Allow all welds to cool completely. Grind all exposed plug welds and seam welds flush with the surrounding panel surface using a grinder or sanding disc. Smooth all welded areas to match the original panel contour. Apply body filler sparingly if needed to achieve final surface smoothness. Clean all welding debris and grinding dust from the area.
15. 15

    Apply Seam Sealer and Corrosion Protection
    Apply body seam sealer to all welded joints and panel edges, matching the location and appearance of original factory sealer. From underneath, spray rust preventative coating inside the rocker cavity through any access holes. Apply additional rust protection to any exposed bare metal areas that will not be visible after painting. Allow sealer to cure per manufacturer specifications.
16. 16

    Prime and Paint Repaired Area
    Apply automotive primer to all bare metal areas of the new rocker panel and any adjacent areas where paint was damaged during repair. Allow primer to dry completely, then sand smooth with 320-400 grit sandpaper. Apply paint matched to vehicle color code in multiple light coats, feathering edges into surrounding original paint. Apply clear coat if required by paint system. Allow paint to cure per manufacturer specifications.
17. 17

    Reinstall Door
    Position door back onto hinges with assistance or using floor jack for support. Thread in door hinge bolts and tighten initially to finger tight. Adjust door position to achieve proper alignment with body lines and even gaps all around. Check door operation and alignment with striker. Once properly aligned, torque door hinge bolts to the manufacturer-specified value (verify exact torque in Mopar 2005 Viper service documentation).
18. 18

    Reinstall Door Sill Trim and Interior Components
    Reposition carpet edge against inner rocker panel. Align door sill trim plate with mounting clips and press firmly into place starting at the rear and working forward until all clips engage. Verify trim is fully seated and flush with floor surface.

Reassembly

1. Reinstall wheel on the side that was repaired and torque lug nuts to specification
2. Reconnect negative battery cable
3. Inspect all paint edges and apply touch-up paint if needed after final cure
4. Remove protective coverings from adjacent panels

Verification

• Open and close door multiple times to verify proper fit, alignment, and operation without binding or interference
• Check all door gaps for uniformity (typically 4-6mm all around) and compare to opposite side
• Inspect body lines across rocker panel, door, fender, and quarter panel for smooth continuous lines with no steps or misalignment
• Verify no visible spot welds or welding imperfections on exterior painted surface
• Inspect underneath vehicle for complete seam sealer coverage and no exposed bare metal
• Check door sill trim for secure attachment and proper seating
• Verify paint finish matches surrounding panels in color and texture

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