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 Post subject: bleeding a cooling system
PostPosted: Mon Sep 06, 2010 10:28 am 
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My stiffness is only an illusion
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The wife's 06 escape has about 75k on it so I decided it was time for a thorough go over from a maintenance standpoint. I replaced the belts, hoses, brake fluid, power steering and tranny fluid. Everything is fine except I can't get it to take enough antifreeze. I have at lease 1.5 gallons sitting in the bucket and only about 3/4 back in the escape. There is no bleeder screw that I can find I'm not comfortable letting her drive it yet.

Any ideas on what I need to do? How do you bleed off a system like this w/ no obvious way to bleed it? BTW, this is running the 3.0 V6 from Mazda, not the Ford 3.0.

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 Post subject:
PostPosted: Mon Sep 06, 2010 10:58 am 
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I'd run it for a while with the pressure cap off, then just keep refilling it until you got close to the right amount back in there.

You could even put the cap on and drive it around for a while to get it warm- then stop and let if cool off enough to remove the cap and top it off. Might have to do that a couple of times, but it should work just fine.


Other than that, I'm not much help....


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 Post subject:
PostPosted: Mon Sep 06, 2010 11:09 am 
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BretLuter wrote:
I'd run it for a while with the pressure cap off, then just keep refilling it until you got close to the right amount back in there.

You could even put the cap on and drive it around for a while to get it warm- then stop and let if cool off enough to remove the cap and top it off. Might have to do that a couple of times, but it should work just fine.


Other than that, I'm not much help....


I've actually driven it around the neighborhood a while and it doesn't seem to want to take any more. I've also let it run w/ the cap off. That worked to a point, but it's now static and not taking any more antifreeze.

I've looked everywhere and can't find a bleeder screw. Frustrating to say the least.

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 Post subject:
PostPosted: Mon Sep 06, 2010 12:02 pm 
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So I decided to pull a Whitney and actually measure the antifreeze I caught and it's right at 3/4 of a gallon. I guess looks are deceiving, I could have sworn it was more. So mix that with what hit the floor and I guess I only dumped a gallon to start with. I'm only missing about 1/4 of gallon from having the escape full. I assume this beast is self correcting over time.

Man, sure looked like more in the bucket....

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 Post subject:
PostPosted: Mon Sep 06, 2010 12:51 pm 
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maybe it's just me but doesn't sound like much. i'm thinking you didn't get it all drained. my 6cyl e30 took nearly two gallons when i flushed it this spring.


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 Post subject: Colling system bleeding
PostPosted: Mon Sep 06, 2010 3:31 pm 
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Rodney, you might want to consult the internet or factory manuals for your specific vehicle. Some vehicles have peculiar bleeding requirements that involve extra hoses and directing coolant from the heater connection into the coolant reservoir. We discovered this at Rockingham Speedway with Pete's Nissan SE-R. Not only did the car have to be facing up-hill, but it required routing the highest coolant line down into the coolant tank for a few minutes to get all the trapped air out of the system.
The factory instructions were necessary to purging all of the air.
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 Post subject:
PostPosted: Mon Sep 06, 2010 6:57 pm 
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did you try turning the hvac heater on full blast? its a common area for air pockets to settle. i dont know the car in question very well but i would guess there is no need for a bleeder screw because the coolant tank is higher than any other part of the cooling system thus being "self bleeding"

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 Post subject:
PostPosted: Tue Sep 07, 2010 10:25 am 
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Sean O'Connell wrote:
did you try turning the hvac heater on full blast? its a common area for air pockets to settle. i dont know the car in question very well but i would guess there is no need for a bleeder screw because the coolant tank is higher than any other part of the cooling system thus being "self bleeding"


Bingo.... That's is the setup exactly where the tank is the highest point. I tried your trick of opening up the heater, but it didn't take anymore from the tank. I'll just continue to watch for a few days.

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Rodney

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