There has been much discussion in the past few weeks about the bellow type thermostat that Packard used from 1935-54. Much of it has been on whether it is suitable for pressurized systems or not. The bellows type thermostat was used in many different makes and models of vehicles besides Packard. I have attached two examples of thermostats that we have in stock. One is a NOS Packard and the other is a NORS "Tru Temp" the tru temp has the applications on the side with vehicles up into the 1960's that did run pressurized systems.
The reason for my post is not to state right or wrong when it comes to bellows vs pellet type but to merely point out that a bellow type can be used and will function properly in a Packard's cooling system using a 7 or 13lb cap. I found in one of our aftermarket manufacturers books (Bridgeport thermostats) from 1964 still recommending the bellows type even though the pellet type was already in use.
My point is that if your Packard has a bellows type thermostat currently you should not be alarmed as it will function correctly.
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