Always wonder why with everything they can repop in plastic why not do our fuel tanks?
These tanks are made using the "Roto-Cast" method of producing large plastic items that can not be economically produced by other means. A mold is built with the correct outside profile and any exterior detail needed. The mold is mounted on the arm of a Roto-Mold machine. The mold is heated to a temp to melt plastic beads poured into the mold. The mold is rotated in a specific pattern and speed to all of the plastic beads to coat the interior of the mold to a specific desired wall thickness. This produces a perfect replica of the mold with predictible wall thickness. Inspection is done using ultra sound, non-destructive measurement. If the item meets spec, it is passed to final clean up and packaging, If not, the detective part is ground into plastic beads and use to make the next item. There is almost no waste with this process. Unfortunately, the machine and molds are very expensive and low volume production is not economically feasible. El Camino owners should buy up all of the
Roadmaster/Caprise SW tanks they can find. They are not available new.