Coolant Temp Sensor - Ford Powerstroke Diesel Forum
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Old 07-08-2010, 06:26 AM
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Coolant Temp Sensor

I just finished replacing my water pump after the bearings on it blew up on Tues morning on the way to work. I replaced the water pump, thermostat, thermostat housing, upper and lower hoses, radiator, the plastic fan blade, and while I was already in there, I decided to install a new coolant temp sensor. The sensor I used is a NAPA TS4047. Is this correct? I have not been able to get it to move off of the cold position. Also, this truck doesn't seem to get air bubbles when filling the coolant like other rigs I've had. I filled it to the max mark on the reservoir, and it hasn't moved. I even dumped in the SCA last night, and after driving 30 miles to work this morning, the coolant in the reservoir is still purple - it doesn't appear to be mixing? Does this just take a long time to circulate?
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Old 07-08-2010, 08:14 AM
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sounds like you have a massive air bubble..really weird cuz you think they'd start coming out.
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Old 07-08-2010, 08:24 AM
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How much coolant should it take if everything except the block and the heater were drained? I was only able to get 5 gallons back in it. The heater seems to work just fine, but I'm not getting any circulation through the overflow tank. Any way to "force" an air bubble out?
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Old 07-09-2010, 10:39 AM
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It turns out that the napa sending unit as bad. Put the stock one back and all is well. So far the coolant is holding it's level, but does not appear to be mixing much in the degassing bottle. It's still purple from the additive. I'll just keep checking it daily.
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