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  #11  
Old 06-07-2013, 06:29 PM
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Err... Air in the system? Random thought.
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  #12  
Old 06-07-2013, 06:43 PM
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If the lower hose is bad and collapsing it could draw air into the system through the overflow tube, especially if the cap is bad or has the wrong amount of pressure release.

The cap is designed to open at a certain pressure to release it. It doesn't go against reason that the same rules apply with it sucking air in if the hose is collapsed. Therefore introducing air into the system.

Kind of like pinching a straw. You have an easier time blowing air out of it as opposed to sucking air in.
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Old 06-07-2013, 07:31 PM
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Default So Happy

I would be so happy if it were just a hose!

though ive spent over 3K on it now with the new engine and all.... at least i would be able to drive without the heater on in 90 degree weather


I don't think there's air in the system. just yesterday i burped it.

while burping it (i had the radiator cap off) after it was at temp when i revved the motor - then let off - water would gush out of the radiator.

is that evidence for or against a collapsed hose? or what is that a sign of?
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Old 06-07-2013, 07:34 PM
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Did you try bypassing the heater core?
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Old 06-07-2013, 09:42 PM
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If you have a set of ramps, put thye truck front up on them and then fill your system and overflow and run it up to normal temp or higher and then shut it down and let it cool down again for a couple hours. Recheck your coolant levels. Run it back up one more time and let it cool. This should totally burp your sytem as the air will head uphill. Then try again.

I also agree that you may have a bad water pump. A partsman I know on another board suggested to some of the board members to get an American rebuilt pump rather than a new offshore pump because of the failure rate he was seeing.
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Old 06-07-2013, 10:29 PM
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Default of course

Thanks - that is exactly how i burped it - except on a hill instead of ramps. the radiator cap was higher than the engine.

bypassing the heater core is a great idea. at least eliminate that. will do that tomorrow.
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Old 06-08-2013, 12:11 AM
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Could the tranmission cause this>? I have had that before but on a Chev, Transmission cause heat as well
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Old 06-09-2013, 09:46 PM
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Default Maybe

I have thought about that - and maybe the catalytic converter

but there's no real evidence of a problem with either
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Old 06-10-2013, 08:51 PM
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Default Fan Clutch?

Is there a way to make the fan clutch engaged all the time? Preferably something reversible. maybe a strategically placed hose clamp or something?
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  #20  
Old 06-10-2013, 09:36 PM
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I took my wife's hair dryer out there and blew it on the fan clutch for about 10 minutes. Right on the spring. It was really hot. there was no difference in resistance when i spun the fan blade.
Could it be that I have a bad fan clutch (it is about 6 months old)
Is a hair dryer a good enough test?
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