> In my 1977 Midget there seem to be TWO recovery bottles. One is apparently
> used to fill the radiator, because there is no pressure cap on the radiator
> itself. If the first bottle overflows it goes into the second bottle.
>
> Allen Hefner
This is the difference between a catch tank and a recovery tank (expansion
tank).
A catch tank, or bottle, is just that, it catches the overflow of expanding
coolant. This coolant
is not returned to the radiator. This type tank generally doesn't have a
radiator cap and is not
pressurized.
A recovery tank, or expansion tank, catches expanding coolant and returns it to
the radiator as
the coolant cools. This type of tank generally has a radiator cap and is
pressurized.
You may have either type or both.
In Allen's case the first tank is a recovery tank, the second tank is a catch
tank.
Larry Hoy
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