The sheet metal Crosley engine was named the COBRA engine, and it stood for
COpper BRAzed. The sheetmetal was formed around the liners and head in a
jig, and copper brazing was run into the jig, brazing the block together. It
was very light and worked well but internal corrosion was the big problem,
and antifreeze tchnology was not far enough along. They then went to a cast
engine block.
Crosley also had the same problem with their disc brakes, they were
considered the first production car to have discs, and they worked well until
(into about the second year of production) major cities started using salt on
their roads. The caliper bores and pistons were not effectively sealed and
corroded quickly. They then went to drums.
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