Buick Straight-6 engine

The Buick Straight 6 was an engine manufactured by Buick from 1914-1930. They were OHV, like their previous engines, as Buick had been almost exclusively using overhead valve engines since the Model B in 1904. The engine also had the starter and generator in a single unit. The engine did not have a removable cylinder head, meaning the cylinders and valves came off as a unit, (although with the valves in cages, the cages were removable individually), and pistons had to come out of the bottom of the unit as it was removed. They had a displacement ranging from 191 to 331 cubic inches depending on year and model. In 1922 the series was divided into the lower priced Standard Six and the high-end Buick Master Six series. The Buick Straight-8 engine replaced the straight 6 across the board in all models, in 1931.

References

• Slauson, H. W.; Howard Greene (1926). "Leading American Motor Cars”. Everyman’s Guide to Motor Efficiency. New York: Leslie-Judge Company.
• Kimes Beverly, Henry Clark, Standard Catalog of American Cars 1805-1942, Iola, Krause Publications Inc, 1996, ISBN 978-08-73414-28-9