bleeding cooling system
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
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.
Senior User
Joined: Oct 2002
Posts: 260
Likes: 0
From: IOWA
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?
>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?
Senior User
Joined: Jan 2002
Posts: 185
Likes: 0
From: Central Florida, USA
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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