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Old 01-23-2006, 11:25 AM
dogguira dogguira is offline
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Question thermostat direction

I am driving a 74 F100 with a 390. I pulled the old thermostat last night. It didn't have the round copper do hickey on it. The replacement does. Which direction does the copper piece go?
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Old 01-23-2006, 11:45 AM
EricJ EricJ is offline
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the copper piece is the temp sensor it goes in the engine, the point goes towards the radiator.
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Old 01-23-2006, 12:02 PM
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You might want to find out where the rest of your old stat went b4 it jams up somewhere.
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Old 01-23-2006, 03:01 PM
dogguira dogguira is offline
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Thank you.Any suggestions?
The radiator lines were clear so is the water pump opening.
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Old 01-23-2006, 03:24 PM
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I've seen a few come apart over the years and I've pulled a couple out of blocks I had apart, but I've never seen one get stuck in the pump or cause any problems, so I wouldn't lose any sleep over it. the only moving part in there is the WP and the inlets are so thin I don't think a very large piece could get to it.
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Old 01-24-2006, 10:03 AM
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Another good tip is to drill a 1/8 inch hole in the flat area of the stat before installing. It will help eliminate any air in the system, and allows a small amount of flow during the cold starts.
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Old 01-24-2006, 10:03 AM
 
 
 
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