Re: 1934 eight cooling system

Posted by Owen_Dyneto On 2022/10/1 17:47:52
Humanpotatohybrid, 1934 Packards do not have a conventional thermostat within the coolant flow. Instead they use a Fulton Sylphon style thermostat in the upper radiator tank to control air flow thru the radiator via shutter vanes. Only a single temperature rating was available, 160 deg. F. which was necessary to keep the coolant below the boiling point of the prevalent antifreeze of the day, methanol.

Bill, normal coolant temperature should be about 160 deg. F., a bit higher under stress like high speeds, mountain driving, etc. I think I've suggested this before, have you had the radiator checked for flow rate? This is the classic standard test. Not necessary to remove the radiator to perform this test. Some test details in the Service Letters, if I've already scanned and can find it, I'll add it here.

EDIT: Using the data for the 901-902 should be satisfactory for your 1100, essentially the same configuration. Also, check that you have the stiffener in your lower hose, or at least that the hose is not collapsed.

Also attaching some info on making a radiator flow rate tester, but your local radiator show should be able to rig something far less elegant and still provide useful info on whether or not the radiator is capable of sufficient flow.

PS - remind us, have you checked for a blown headgasket or cracked cylinder head or block? Checked the ignition timing?

Attach file:



jpg  Radiator flow rates.jpg (179.78 KB)
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jpg  Radiator flow rate.jpg (230.30 KB)
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