Coolant hose swap out and now no circulation

ChevroletTough · February 25, 2020

Hey guys,

I just swapped out the upper and lower rad hoses, and the coolant sensor. I did not do the T stat as I just did that not too long ago. This is on my 2000 7.4 l

I filled the radiator. Burped it. Upper hose isn’t getting warm, engine is getting too warm (not dangerously high.)

Also did the bypass hose as it was leaking just a tiny bit at times.

Is there a bleeder valve that I’m unaware of?

Maybe I have air in the system as I didn’t remove the t stat???

There was sediment in the coolant drained that is not a good sign)

Heat was working great before I did this. Coolant was gross.

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Gmman · February 25, 2020

Sounds like you still have air in the system.

ChevroletTough · February 25, 2020

Yup, not even close to enough coolant in. My bad. Gotta get more, it won’t circulate without coolant! Lol.

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ChevroletTough · February 25, 2020

I’ll end up flushing the system this summer.

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CamGTP · February 25, 2020

Fill the engine through the top radiator hose, then hook it back up and top off the radiator.

Though I guess on a 5.7 that would mean taking the thermostat out first to fill the engine to the top of that.

LS engines are a tad different.

m&jtrans · February 25, 2020

Is the hose kinked somewhere?

Blue Mule

ChevroletTough · February 25, 2020

Fill the engine through the top radiator hose, then hook it back up and top off the radiator.

Though I guess on a 5.7 that would mean taking the thermostat out first to fill the engine to the top of that.

LS engines are a tad different.

I considered doing this too, but may try just getting the rad full and see where it goes. If it won’t go I’ll pull the top rad hose and fill from there.

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ChevroletTough · February 25, 2020

Is the hose kinked somewhere?

Blue Mule

Nah, not even possible to kink it, they are pre curved.

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ChevroletTough · February 25, 2020

Getting more coolant today. Going to take the thermostat off and fill the block up. Not sure why I opted to not do that.

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ChevroletTough · February 25, 2020

Get 'er all topped off. Heat is better than before I did any work. I will probably end up checking the rad a few times after it cools.

Will flush the block and radiator this summer. Too cold to use the outdoor hose.

Brian Lindsey · February 27, 2020

they have coolant fill systems that suck the air out as you fill, a mech told me once to loosen top hose and burp it thru it, never tried it but he says it works