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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Runs hot + temp varies

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Old Mar 11, 2008 | 09:45 AM
  #1  
86stepsideF150's Avatar
86stepsideF150
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Runs hot + temp varies

I had a leaking waterpump on my '86 F150/301 EFI. I installed a new waterpump, and went ahead and installed a new thermostat as well. It doesn't leak now, but the temp. varies when it's driven. When it first heats up, sometimes the temp. will reach the "L" in "NORMAL" on the water temp. gauge, and it will like a few minutes of driving for the temp. to settle back to exactly halfway on the gauge. It doesn't ever "overheat", and the gauge never bottoms out, but sometimes it gets a little hot. Is this something to be concerned about? I'm pretty sure I didn't put the thermostat in backwords, so what else could cause this, if it is a problem?
 
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Old Mar 11, 2008 | 11:36 AM
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you could have air pockets in the cooling system. recheck the coolant level after it's completly cooled down.
 
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Old Mar 11, 2008 | 12:34 PM
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sounds like air trapped in your cooling system
 
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Old Mar 11, 2008 | 01:36 PM
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Just throwing this out there, but it could be your gauge or temp sender. Just a thought.
 
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Old Mar 11, 2008 | 08:31 PM
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go with after market gauge, so you know true temps, right now your guessing..
 
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