Heater Valve on?
Thread Starter
Instructor
Joined: Oct 2021
Posts: 157
Likes: 29
From: Montezuma Ga
Heater Valve on?
Greetings, My heater valve has the hard vacuum line disconnected and melted/sealed off. Is the valve normally open and vacuum activated closed? Meaning heat until vacuum applied?
TIA
TIA
Thread Starter
Instructor
Joined: Oct 2021
Posts: 157
Likes: 29
From: Montezuma Ga
I found a thread that states its always on and vacuum operated off. Next question is what to do about the thin hard vacuum lines? Are they available? How about the end fittings for them? I see corvette central sells a kit but its only rubber hose. Do I just replace all the hard lines with rubber hoses?
Thanks
Thanks
Race Director
Joined: Mar 2017
Posts: 11,978
Likes: 4,528
From: Virginia
If you have a Mityvac, or even an extra piece of hose, test that the valve actually works before bothering with it.
Lots of folks on this Forum install a bypass in the summer, or block the flow to the heater core entirely, with valves or plugs.
Lots of folks on this Forum install a bypass in the summer, or block the flow to the heater core entirely, with valves or plugs.
Safety Car
Joined: Oct 2007
Posts: 4,394
Likes: 1,775
From: Seattle Area Washington
Snip off the damaged section.
Get a length of 1/8" ID rubber VACUUM line and it will fit secure around the hard poly line.
And yes, the original hot water shutoff valve is normally open.
Vacuum signal to close.
Get a length of 1/8" ID rubber VACUUM line and it will fit secure around the hard poly line.
And yes, the original hot water shutoff valve is normally open.
Vacuum signal to close.
