1939 LaSalle Production - GM Heritage Center

Forward mounts are now further inward and the
mounting beneath the transmission extension is entirely
new, though its novel construction principle is retained.
It consists of two rubber parts: a compression cushion
and a rebound cushion. The compression cushion counteracts
downward thrusts of the engine caused by power
forces. The rebound cushion absorbs the reactionary
upward movement of the engine's weight and completely
insulates engine tremors from the frame bracket.
The effect of the redesigned supports is to give
smoother performance throughout the entire speed range.
Enbloc Cylinder and Crankcase
Crankcase and block are cast in one mold from very
hard, specially prepared alloy of steel and iron. The
enbloc casting is then placed in an "equalizing" oven
to season the metal by slow cooling to normal tem-
V-8 Enbloc Cylinder and Crankcase
perature. An extremely rigid, durable engine foundation
is thus secured. Other manufacturers use such
soft, inexpensive cylinder block iron that the material
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