cabin heat

[Cwcb08]

after replacing the heater core i still only get cold air in the car no mater what setting its on

so i did some looking under the hood. i found the coolant hoses are hot up to the Y and then cold between there and the core, and when it exits the core its cold up to the heat valve then cool from the valve back to the intake. so i put my brake bleeder vacuume pump on the vale and tried to draw a vacuum but no luck so i put the hoses back on and tried to trace them with no luck, can anyone point me in the right direction?

this is what im looking at under the hood



what is this small broken line? i dont see anywhere it should connect. there are 2 large lines that pass thru the firewall in the same location as the small line, 1 from the vacuum can, and the other steps down in size then connects to the heater valve

[simplyconnected]

The valve is a simple vacuum-operated two way valve. It isn't fancy like a servo that opens partially. This one is either all the way on or all the way off.

So, applying vacuum opens the valve, then you should feel heat flowing through the hoses. It's like an electrical switch; if you block flow in any portion of the circuit, the whole thing (both hoses) stops flowing.

It wouldn't hurt to take the valve out and replace it with a short nipple, for testing purposes. BTW, many millions of cars and trucks over many brands used a valve just like yours. Other options include a mechanical arm that operates with a cable or a solenoid valve operated by 12 volts. - Dave

[Cwcb08]

would you happen to have the pages from the shop manual on the vacuum lines to help me trace them?

[jopizz]

You can download a digital copy of the shop manual for less than $20 here. It's cheap considering how much you will use it.
http://www.campbellenterprises.com/f...l-download.php

John

[Cwcb08]

Originally Posted by jopizz

You can download a digital copy of the shop manual for less than $20 here. It's cheap considering how much you will use it.
http://www.campbellenterprises.com/f...l-download.php

John

Well I got permission from the boss to pull the trigger, 24$ Canadian thanks to it being on sale for 16 (y)

- that section of the manual leaves some to be desired and shows a 3 port manifold with two hoses, but still doesn't answer where the thin hose in my photo goes?

[stubbie]

I think that tube is the main supply for the ac/heater vacuum. Should be 7/64ths in size and goes to the cannister on the front fender. I had a problem with my heater and found that that valve was clogged with dirt and rust. Try cleaning it out.
Send me a pm with your email address and I can send you a Vacuum Diagram for 64-65's

[Cwcb08]

Originally Posted by stubbie

I think that tube is the main supply for the ac/heater vacuum. Should be 7/64ths in size and goes to the cannister on the front fender. I had a problem with my heater and found that that valve was clogged with dirt and rust. Try cleaning it out.
Send me a pm with your email address and I can send you a Vacuum Diagram for 64-65's

Pm'd ya ( .... to reach 10characters )

[stubbie]

Diagram sent. That canister is normally for door lock vacuum. AC and heater vacuum for a 66 usually comes from a canister on the front fender just behind the battery or from behind the light.
See link
http://www.vintagethunderbirdclub.ne...=vacuum#p85727

[Cwcb08]

i have found the other vacuum can and replaced the line to it, added a T back in where it was missing and ran a new line into the cab ( i might have been able to skip that step but i got a little rammy and foolishly pulled the main line out yesterday )



then i removed the blower motor and the thermostatic control valve and replaced the broken thin line, 2moro i need to get another 5/32" T and hopefully finish messing with vacuum lines

stubbie do you mind if i post up the diagrams you shared with me?

[stubbie]

I can't remember were I got it. It may have been here on the tech pages.