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Help identifying a coolant part


Corrin Brannon

New Member
Joined
Jul 5, 2025
Messages
3
City
Georgia
Vehicle Year
2000
Transmission
Automatic
IMG_2942.jpeg

this small thing is leaking coolant, it’s on the back left side of the engine, I have a 4.L engine although a similar thing exists on my 3.L please let me know if you have any clue on what it is or what it does. Thank yall
 
Yup, heater control valve. It shuts off coolant flow to the heater core when you’re running the AC so the AC gets colder
 
I am glad yall knew that. If it leaked on my truck i would have had to take a pic and ask, too
 
I am glad yall knew that. If it leaked on my truck i would have had to take a pic and ask, too
I know it because I’ve been considering adding that to my older trucks although I’d have to rig up a vacuum connection and control, but it would help the AC
 
I know it because I’ve been considering adding that to my older trucks although I’d have to rig up a vacuum connection and control, but it would help the AC
You could always get an electric one, same wire that activates A/C clutch can activate the valve.
 

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