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Coolant system

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Old Jul 26, 2007 | 09:47 AM
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Coolant system
Can anyone tell me if the 49' trucks with flathead V-8's had coolant thermostats and did they have a pressurized system, ie pressure radiator cap.
 
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Old Jul 26, 2007 | 10:52 AM
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The thermostats are in the heads, inside the water necks.

I pretty sure they have a pressurized system.
 
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Old Jul 26, 2007 | 11:55 AM
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Yes they did.
 
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Old Jul 26, 2007 | 02:15 PM
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They had very low pressure caps 4-7 pounds as I remember...
 
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Old Jul 26, 2007 | 04:14 PM
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The guys have it for you John. Correct on all points. You have to go all the way back to the Model T's and A's to find open systems w/o thermostats. Maybe a few of the earliest flathead V8s ran without .....
 
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