Lost all my coolant through this device. What is it?

[hekg]

Hi all, my truck dumped all it's coolant yesterday and the engine started making a loud metalic noise when I finally realized it. I added coolant and saw that it was all coming out through a broken hose connection on this little device that lives under the air filter box. What is it called so that I can find one and replace it?

Also, what in the world was that metallic noise coming from the engine after it ran dry for just a few minutes?? Should I be freaking out now? Lol
Thanks!

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[hekg]

BTW here's the noise. Sounds almost like steam coming from the broken hose I hope!

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[HotWheelsBurban]

That's the heater control valve. They're made of plastic and after 20+ years they wear out and crack. Also if you have rear heat, there is a plastic Y that also breaks and leaks. I've had this happen on both my 99 Burbs.
You need to look at your oil. If it's milky looking, coolant is mixing with the oil( most likely from intake manifold gaskets or head gaskets). This is a common issue on vortecs (96_2000). These parts are available at your local parts stores, and not too expensive.

 

[hekg]

That's the heater control valve. They're made of plastic and after 20+ years they wear out and crack. Also if you have rear heat, there is a plastic Y that also breaks and leaks. I've had this happen on both my 99 Burbs.
You need to look at your oil. If it's milky looking, coolant is mixing with the oil( most likely from intake manifold gaskets or head gaskets). This is a common issue on vortecs (96_2000). These parts are available at your local parts stores, and not too expensive.

Ahhh! Excellent, thanks alot bud.

 

[SUBURBAN5]

Yeah if I was you I replace all the plastic fittings and hoses

 

[hekg]

Hi all. I installed a new AC Delco heater control valve and now when I put the car in drive and go, I hear water running or flowing loudly under the right side of my dashboard.

There are no leaks but just the sound of running water when I drive from a dead stop.

Does this mean that I could've put the valve on wrong/backwards? Does anyone know or have a diagram that shows exactly which hose goes to which port on this valve?
Thanks!

 

[hekg]

Wow I just found this diagram on another post here and it shows a thin vacuum hose going to the solenoid or valve there and I did not know about that one

My old valve did not have it connected so I guess I have to go looking for that one and connecting it to see if that's my issue.

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[hekg]

If found this diagram which shows exactly which hose goes to which port on the valve in case anyone else needs it.

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[Erik the Awful]

If you can hear the coolant flowing, you have air in the system. When your engine's cool, check your coolant level in the radiator.

 

[sewlow]

If you can hear the coolant flowing, you have air in the system. When your engine's cool, check your coolant level in the radiator.

Yup! Parking the truck overnight with the front end on some ramps or pointing up a hill helps to burp it. Loosen the cap.
These trucks have a rep for retaining air in the cooling system after it's drained or gets down below a certain level.
Sometimes it takes more than one burp session to get all the air out. 3X the last time I did the intake manifold gaskets.