That sort of louvers were pretty common, almost standard on heavy trucks
until not too long ago--which likely accounts for the size of the
factory. The development of 'wier' style thermostats for the bigger
diesels, which give much more progressive control of coolant flow, has
rendered them less common over the past 20 years or so.
Greg
[email protected] wrote:
I recently made an interesting find in my barn. It is a "Winterfront" made
by Pine Manufacturing Co. This mounted over the front of a flat front
radiator typical in the early 1930's. I don't know if it is model specific. In
any case, it has a row of louvers which are thermostatically opened by a
thermostat as the engine warms up. It must have been a popular item, I Googled
it and came up with a picture of a rather large factory. The text notes
that they lost popularity after alcohol was replaced by "permanent
antifreeze".
Tom Faust
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