Mustang Cowl Panel Assembly (1969-1970) Installation Instructions
This Cowl Panel Assembly will fit 1969-1970 Mustangs.
If your 1969-1970 Mustang is in poor shape and your existing cowl panel assembly is rusted and dented, it might be a perfect time to install a new Cowl Panel Assembly from CJ Pony Parts. Order this part today and get the cowl area on your Mustang looking great in no time at all.
Tools Required:
- Drill
- Angle Grinder
- Spot Weld Cutter
- Mig or Spot Welder
Install Difficulty:
- Difficult Project
1. To start installing your new Mustang Cowl Assembly, remove the inner fender extensions. To do this, use an angle grinder with a wire brush attachment to remove the paint from the area where the extension is attached to the cowl and inner fender. This will make it easier to see where the factory spot welds are located. Once the spot welds are exposed, center punch the center of the spot weld. Then, using a spot weld cutter, remove the spot welds. Be careful not to cut the entire way through the inner fender.
2. Once the Mustang fender extension is removed, the spot welds that secure the cowl can be drilled out. Go around the perimeter of the cowl with a wire brush. This will expose the spot welds. Then, using the same technique used to remove the spot welds from the inner fender extensions, drill out all of the spot welds that secure the cowl assembly to the vehicle. Be careful not to drill the entire way through the firewall and cowl side panel.
3. There are also several spot welds underneath the Mustang cowl that secure it to the inner side cowl structure. To drill out these spot welds it is easiest to cut a hole in the top of the cowl to gain access from the top. The arrow in the picture below shows where the welds are located.
4. Now that all of the spot welds have been drilled out the cowl assembly can be removed. It may be necessary to use a hammer and chisel to separate the panels. Be careful not to damage the Mustang firewall area and cowl side panels with the chisel. The picture below shows the cowl assembly removed from the car.
5. With the old cowl assembly removed from the car, clean the cowl area. On surfaces that will be welded, apply a coat of Mustang weld thru primer.
6. Once the surfaces have been prepped, set in the new cowl assembly. Line up the export brace mounting holes in the cowl assembly with the export brace mounting holes in the firewall. Insert the Mustang export brace mounting hardware into their respective holes and tighten them. This will ensure that your new cowl is aligned correctly.
7. With the new cowl assembly aligned, it is time to weld it in. Follow along the perimeter of the cowl assembly with a spot welder, keeping your welds about one inch apart. In areas that you cannot gain access to with a spot welder, drill 1/4 inch holes and plug weld them with a MiG welder, then grind the welds flush. If you do not have access to a spot welder, the drilling and plug welding method can be used for the entire panel.
8. Weld the inner cowl side panel to the cowl assembly. To do this correctly, the Mustang outer side cowl panel must be removed. To remove that panel, locate and drill all of the spot welds that are securing it to the car. With the panel removed, you can now access the flange that gets welded to the complete cowl assembly. Surface rust should be removed and weld through primer applied anywhere that two surfaces will be welded together. The outer cowl side panel can be reattached by putting it back in place and plug welding through the holes that were left by the Mustang spot weld cutter. The same procedure is used for both sides.
9. Finally, apply a brush on seam sealer along the edge of the new cowl assembly, and the installation of your new Mustang Cowl Assembly is complete.
