Re: 1948 Coolant Overflow Tank

Posted by Owen_Dyneto On 2014/12/9 14:41:12

Some may find the reason interesting (though obvious when you give it some thought) that the Twelves 32-39 had a coolant reserve tank, yet the Eights and Super Eights did not. The coolant expands in volume as the engine reaches operating temperature - with the Eights and Super Eights with a 5-gallon cooling system this expansion is easily accommodated in the headspace of the upper radiator tank, provided it is not overfilled when cold. But the Twelves had a 10-gallon cooling system capacity and the new volume resulting from the expansion exceeded the available headspace in the upper radiator tank and was thus routed to an expansion tank.