Emilie Meyer
The Chevrolet Corvair, produced in the 1960s, is a compact contemporary crossover between a Corvette and the Chevy Bel Air. The floor pan of the Corvair is essential to the integrity and strength of the vehicle. If your floor pan has suffered from rust, corrosion, or accident damage, it is best to replace it with a new one. This can be done by purchasing a new Chevrolet Corvair floor pan from retailers such as Andy's Auto Sport or Classic 2 Current Fabrication. Alternatively, you can use flat sheet steel to produce your own floor pans, replicating the factory floor pans. If you are a first-time Corvair owner, it is important to note that you may need to source a complete rust-free center body section of the car, including both rocker panels, and cut above the flat sheet metal floor to ensure a clean dissection.
| Characteristics | Values |
|---|---|
| Car model | Chevrolet Corvair |
| Car type | Two-door coupe or convertible model, four-door Corvair sedan or station wagon, or the powerful Monza coupe |
| Year | 1960s |
| Floor pan material | Steel |
| Floor pan type | Replacement floor pans, reproduction floor panel sections |
| Floor pan function | Structural member used to connect the different areas of the chassis to prevent flex and distortion |
| Floor pan issues | Rust, corrosion, accident damage, holes |
| Repair considerations | Use heavier gauge metal than factory for added strength, use bead roller to create ridges for strength |
| Repair steps | Source rust-free center body section, cut above flat sheet metal floor, carefully weld and drill apart, use Clark's Corvair Parts for reproduction floor panel sections |
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What You'll Learn
Sourcing a complete rust-free centre body section
When it comes to sourcing a complete rust-free centre body section for a 62 Corvair, there are a few key considerations and steps to keep in mind. Firstly, it is important to assess the condition of the subframe and determine if it is worth repairing. If the subframe is in good condition, the next step is to source a rust-free centre body section, including both rocker panels. It is recommended to cut at least 6" above the flat sheet metal floor in the front and rear to ensure you have enough material to work with. This will provide all the necessary components, such as seat risers, tunnel pieces, and subframe sections, which can be carefully welded, drilled, and reused.
One option for sourcing the centre body section is to find a donor car with a solid body but issues in other areas, such as the floors or undercover. By carefully dismantling and transporting key sections, like the front seat riser and rear seat riser, you can obtain the needed parts without having to transport an entire floor and rocker. This approach may be more feasible than trying to source an entire rust-free floor, which can be challenging to find.
Another option is to use reproduction parts and panels designed for Corvairs. Companies like Classic 2 Current Fabrication offer an extensive inventory of Corvair floor pans and rocker panels, catering to both first and second-generation models. These reproduction parts can be a reliable solution for restoring your 62 Corvair.
Additionally, if you have access to a bead roller, you can even create your own floor pans using regular flat sheet steel. This do-it-yourself approach can replicate the factory floor pans' strength by adding ridges, and it may be a cost-effective solution if you plan to do multiple restorations.
When working on the centre body section, it is crucial to be mindful of the many supports and wires under the floor panels, including fuel lines. Always exercise caution when cutting or drilling to avoid accidental damage. It is also important to note that factory spot welds can sometimes leave large holes in the metal, so care is needed when removing and reusing sections.
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Using a sedan floor pan
When it comes to replacing the floor pans of your 1962 Corvair, one recommended approach is to use a sedan floor pan. This is generally considered a better option than using a convertible pan in a coupe. While there may be slight differences in the seat risers, sedan floor pans can provide a more suitable solution.
To begin the replacement process, it is important to assess the condition of your Corvair's subframe. If the subframe is in good condition, you can focus on sourcing a complete rust-free center body section, including both rocker panels. Cut at least 6 inches above the flat sheet metal floor in both the front and rear sections. This will allow you to precisely dissect and obtain the necessary parts, such as seat risers, tunnel pieces, and subframe sections. Careful welding and drilling will be required to separate and reuse these components.
When choosing a sedan floor pan, consider opting for a higher gauge metal than the factory standard. For example, using 14-gauge metal instead of 18-gauge can enhance the strength and ride quality of your Corvair, as mentioned by a user who restored their 1963 convertible. This approach can also help reduce rattles and provide a smoother driving experience.
Additionally, you may want to explore both new and used options for sedan floor pans. While purchasing a new floor pan from a reputable supplier like Clarks can ensure quality and a perfect fit, it may be more expensive. Alternatively, you can search for used floor pans from other cars or connect with fellow Corvair enthusiasts through forums and online communities. Some members may have solid floors available at a more affordable price or be willing to part with their old car parts for restoration projects.
Remember, floor pans are crucial to the integrity and strength of your Corvair. They serve as structural members that connect different areas of the chassis, preventing flex and distortion. By following these steps and choosing the right sedan floor pan, you can effectively restore your 1962 Corvair's floor and improve its overall performance.
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Using sheet metal
When it comes to replacing the floor pans of your 1962 Corvair, using sheet metal is a viable option. This method can be cost-effective, especially if you are on a budget, and can result in a stronger floor than the original. Here is a step-by-step guide on how to approach this project using sheet metal:
Materials and Tools:
First, gather the necessary materials and tools. You will need sheet metal, preferably 14-gauge or 16-gauge steel, which can be sourced from a local supplier or a store like Clark's Corvair Parts. Additionally, you will require a range of tools, including a welder, a body hammer, cutting wheel, wide sheet metal pliers, drill and bits, chisels, a die grinder with sanding discs, a straight edge, measuring tape, poster board, scissors, and a pencil or marker.
Planning and Measurement:
Before cutting the sheet metal, it is crucial to plan and measure accurately. Start by assessing the extent of the damage and determining which sections of the floor pan need to be replaced. Create a template or pattern using cardboard or poster board, ensuring it fits the floor pan area that needs replacement. This template will serve as your guide for cutting the sheet metal.
Cutting and Fabrication:
Using the template, carefully cut the sheet metal to match the required shape and size. It is advisable to cut slightly smaller than needed, as you can always cut more if adjustments are required. If you need to recreate ribs or ridges in the sheet metal for added strength, use a wood mallet and shaping dollies. These features contribute to the structural integrity of the floor pans.
Welding and Installation:
Before welding, ensure that the metal surfaces are clean and free from rust, as this will make the process easier. Practice your welding skills on scrap metal if needed. Fit the fabricated sheet metal into the Corvair, ensuring a precise match with the existing structure. Weld the new sheet metal floor pans into place, being mindful of the factory spot welds to avoid large holes in the metal.
Post-Installation:
Once the new sheet metal floor pans are installed, you can further reinforce them by coating the floors and using fibreglass reinforcement. Additionally, you may need to fabricate other sections, such as the rear seat riser, and make adjustments to components like the seat risers and tunnel pieces. Always prioritize safety and structural integrity in your installations.
Remember, this is a simplified guide, and each Corvair may have unique considerations. Taking your time, practicing your skills, and seeking additional resources and advice from Corvair enthusiasts and professionals can help ensure a successful floor pan replacement project.
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Using flat sheet steel
If you are restoring a Corvair, it is likely that you will need to deal with rusty floor pans. While it is possible to get away with minimal patchwork, it is often the case that the pans are completely wasted and need to be replaced.
One option is to buy sheet metal and cut it out, welding it into place. However, this can be difficult as you need to cut the sheet metal to the exact size and shape, and you will not have the same seams and creases as the original floor pans, which help to counteract vibrations and improve strength.
If you opt for this method, you will need to decide on the gauge of the sheet metal. The originals were 18-gauge, but you can opt for a heavier gauge for more strength. For example, 14-gauge or 16-gauge steel will result in a stronger floor pan than the original. Thicker steel will be more difficult to form, but it will be sturdier and easier to weld.
To begin the process, you will need to cut away the offending sheet metal using a plasma torch. You will then need to create a pattern for the new floor pans and transfer this pattern to the flat sheet metal, adding an inch to a couple of sides for a flange to mate up to the remaining floor. You can then cut out the shape and begin the process of fitting it into place, trimming as needed.
When trimming, always cut on the small side so that you can easily cut more without ruining the panel. You can use a small flat-tip screwdriver or putty knife to move the metal edges into better alignment before welding. A second person can help hold things in place with a pry bar. You can also use a hammer and dolly to flatten or align areas as you go.
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Welding techniques
Welding is an essential part of replacing the floor pans of a 1962 Corvair. While it may be a time-consuming and tedious process, it is not beyond the abilities of even a beginner welder.
One welding technique that can be used is butt-welding, which involves welding the replacement panels directly to the Corvair's floor. This method can be challenging and may ruin the panels if not done correctly. It is important to control heat warpage when butt-welding, as this can affect the weld negatively. To avoid this, use a fresh grinding disc, as it cuts faster and doesn't build up as much heat as a dull disc. Additionally, standard MIG welding wire is rock hard and difficult to grind, so consider using Easy-Grind MIG wire if your budget allows.
Another technique is to use a weld-through primer, which can help with rust issues between the panels. This method involves overlapping the panels and welding them together. It is important to seal and paint both sides of the panels to prevent rust.
A combination of structural adhesive and plug welds can also be used to put the floors in. This method does not require heat and can help avoid heat distortion and corrosion. However, it may not be as strong as solid welding, especially if the panels do not have a tight, flat overlap seam.
When welding, it is important to trim the replacement steel down, leaving it slightly larger than needed. This ensures a precise fit, and any excess can be trimmed later. Tack weld a few spots, and then cut along the edge of the patch, trimming the floor until the patch fits flush. Finally, complete the welds using stitch welds, allowing the metal to cool between welds to avoid warpage.
Additionally, when working with a unibody construction, it is important to carefully remove and reuse parts, as there may be large factory spot welds that can leave holes in the metal.
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Frequently asked questions
Floor pans are the stamped metal pieces that make up the floor area and underside of your vehicle.
You can buy floor pans for your 62 Corvair from retailers such as Andy's Auto Sport, Classic 2 Current Fabrication, and Clark's Corvair Parts.
You should opt for a steel floor pan, as this will be stronger than a fiberglass floor pan. You may also want to buy a floor pan that is thicker than the original, such as 14-gauge sheet metal, for added strength.
To install a floor pan in your 62 Corvair, you will need to first cut out the weak area of the original floor pan. Then, lay the new floor pan in place, trace the holes and braces, and trim the replacement steel, leaving it larger than needed by around 3/4" on all edges. Next, lay the new piece back in place and carefully trim it down until it fits. Finally, tack weld a few spots, cut along the edge of the patch, and trim the floor until the patch fits flush all the way around.
