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

Overheating

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Old Dec 10, 2018 | 06:37 PM
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Overheating

1985 f150 6 cylinder 300 overheating after installing overflow reservoir
 
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Old Dec 11, 2018 | 05:07 AM
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How do you know it's over heating?
Dave - - - -
 
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Old Dec 11, 2018 | 07:04 AM
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Originally Posted by FuzzFace2
How do you know it's over heating?
Dave - - - -
temp gauge all the way to right pushes fluid into resevoir. If resevoir filled to cold level before it over flows
 
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Old Dec 11, 2018 | 08:12 AM
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Have just done any work to the engine and have drained the coolant and refilled it?
 
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Old Dec 11, 2018 | 08:56 AM
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Originally Posted by Franklin2
Have just done any work to the engine and have drained the coolant and refilled it?
yes drained and flushed coolant only work replaced thermostat
 
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Old Dec 11, 2018 | 09:06 AM
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I would run it with the cap off the radiator. It may overflow on you a couple of times till finally the thermostat is fully open. Once it is fully open and you see water flowing through the radiator, top it off and you should be good. Sounds like you have air in the engine.

If you want to try to prevent this or minimize this in the future, when filling the radiator take one of the heater hoses off the engine, preferably the higher one. Don't take them off the heater core, too easy to crack that. Then fill it till coolant comes out of the place you disconnected, and then quickly reconnect and keep filling. It will still have some air in it but not as much as it does now.
 
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