Still battleing this coolant temp issue. Please help!!!

[06kngrnch84]

I've started another thread about this but its kinda went cold and I done some more research today. 06 F-350 King Ranch FX4. Temps have been all over the place and heat doesn't work unless I'm actually cruising at at least 55 mph. Someone said to check coolant level, well according to my Degas bottle the level is good, about halfway below the mark. I noticed one time before that when my truck was at operating temp I could loosen the cap on the Degas bottle and coolant would rush in and fill the bottle up, it doesn't do that now. Also not getting any flow of coolant from the hose that connects from the top of the intake to the Degas bottle. Took my coolant filter off to check it, very little coolant was in it. Also turned my valve on while the truck was running, once again no flow of coolant going to my filter. Decided to see how much coolant was actually in my radiator, drained it to see. Got about 1.5 gallons of coolant out of the radiator, not sure how much the radiator itself holds?? Anybody else experienced this? Any ideas? Any help is appreciated.

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[tatertot]

did you check to see if your hoses or heater core is blocked up

[06kngrnch84]

I Checked the hose from the intake to the Degas bottle but that's all I checked. Not sure how to check the heater core

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[southend]

You should have gotten about 3 gal. Sounds like air in the system, run your truck with the heater on. After it's up to temp, loosen the cap, add if needed, repeat. Do you have a monitor?

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[06kngrnch84]

Originally Posted by southend

You should have gotten about 3 gal. Sounds like air in the system, run your truck with the heater on. After it's up to temp, loosen the cap, add if needed, repeat. Do you have a monitor?

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Yes. Scan gauge II

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[southend]

What are your ect and eot?

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[tatertot]

pull your hoses on the heater core and get the garden hose out see if anything comes out the other side to me it seems like your heater core is plugged up

[tatertot]

just drained my raditor last weekend and got about 3 gallons out of it also

[06kngrnch84]

Originally Posted by southend

What are your ect and eot?

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When I first start up in the morning temps are fine. I warm it to at least 150*f before I drive. When I first start driving ect climb, quickly, up to 200* within a couple minutes, even up as high as 205*. Eot rises normally. Ect drops back to normal when I start cruising at about 60 mph, this is also when my heat starts to work. While I'm cruising at highway speeds ect and Eot are normal 192* with no more than usually a 4-5* delta. When I start slowing down or stop the ect rises and heat stops working.

Ect as high as 215* at one time but didn't stay there for long.


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[southend]

Originally Posted by 06kngrnch84

When I first start up in the morning temps are fine. I warm it to at least 150*f before I drive. When I first start driving ect climb, quickly, up to 200* within a couple minutes, even up as high as 205*. Eot rises normally. Ect drops back to normal when I start cruising at about 60 mph, this is also when my heat starts to work. While I'm cruising at highway speeds ect and Eot are normal 192* with no more than usually a 4-5* delta. When I start slowing down or stop the ect rises and heat stops working.

Ect as high as 215* at one time but didn't stay there for long.


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I'm still sticking with air in the system, everything you've said leads to that. Dunno?

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