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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old 01-11-2003, 12:10 PM
lawless lawless is offline
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bleeding cooling system

I just put a heater core in a 1989 E150 5.0l. I need to know how to bleed the cooling system. Thanks in advance.
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Old 01-11-2003, 12:27 PM
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EPNCSU2006 EPNCSU2006 is offline
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bleeding cooling system

Fill up the radiator, and then with the cap off, start the truck and turn the heater on. Let it warm up so that the thermostat opens up. Then add additional water/coolant as necessary to bring the level in the radiator back up to the filler neck.
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Old 01-13-2003, 07:37 AM
billman billman is offline
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bleeding cooling system

>Fill up the radiator, and then with the cap off, start the
>truck and turn the heater on. Let it warm up so that the
>thermostat opens up. Then add additional water/coolant as
>necessary to bring the level in the radiator back up to the
>filler neck.

When I try to do that with my 5.8, as it warms up, the coolant starts to come back out the rad cap. Is that a problem?
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Old 01-13-2003, 08:43 AM
michaelskerrett michaelskerrett is offline
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Post bleeding cooling system

No, its not a problem, but there is no sense in letting good coolent flow on the ground. I usually leave the cap on and wait until a few minutes after I feel the top hose get hot. This means that the coolent is flowing back to the engine due to the thermostat opening. Carefully opening the radiator cap then will allow the reservoir to be topped off with your water/coolent mix.
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Old 01-13-2003, 10:06 AM
dbrown13 dbrown13 is offline
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bleeding cooling system

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Old 01-13-2003, 10:06 AM
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