I always thought the A/C evap core was on the front of the truck. it would make more sense since the wind blows through there.

I am not really into cutting hoses and re routing anything while my truck is still under warranty. It woudl eb nice to have some cooler A/C though. It was 100 degrees here at 5pm yesterday!

 

If I remember correctly you could find a similar setup on a older GM vehicle, it was called the heater control valve if i am not mistaken. Seems like it would work the same but if my memory serves me correct it ran off vacuum... But still a mod worth looking in too since my AC has never blown cold in my opinion.

 

I just googled it and apparently alot of automakers use this setup, looks like you can find one at the local auto parts instead of making one...

I am going to do this mod to see what happens...

 

Blocking off flow to the heater core doesn't change the fact that the A/C is still displacing a tremendous amount of heat from the interior of the truck as it sits outside. From the dash, carpets, seats, exterior body panels.

My A/C works just fine without any hokey cut off valves or hacked up hoses.

 

I would be concerned about this as well, afterall, coolant does also act as a lubricant.

That being said, I'm happy with my AC performance as well. It does take a while to cool off when the truck; a black truck at that; has been sitting for hours in the sun on a hot humid day. It's also a lot of interior space to cool off, especially in a supercrew.

 

That hose is coming off the top side of the thermostat, and flows into the heater core. There isn't a bypass there, though I'm sure one could be fashioned using a tee. The way his is hooked, he is stopping his coolant flow, and will blow some hoses soon if it stays closed.

 

That hose is coming off the top side of the thermostat, and flows into the heater core. There isn't a bypass there, though I'm sure one could be fashioned using a tee. The way his is hooked, he is stopping his coolant flow, and will blow some hoses soon if it stays closed.

 

I agree I have a supercrew And it cools the cab My vents are blowing 49 degrees of cold air and its a 2004

 

[QUOTE=Quintin;3254451]Blocking off flow to the heater core doesn't change the fact that the A/C is still displacing a tremendous amount of heat from the interior of the truck as it sits outside. From the dash, carpets, seats, exterior body panels.

 

Last week we had several hot days, reached 100 degrees! My AC worked very well for the interior volume of a SCREW!.........I'm satisfied with it's performance!........

 

Wouldn't it be better to just bypass the heater core by taking both heater hoses and connecting them together. With this approach there wouldn't be any blocked hose to build up pressure.

 

Like some mentioned above, other brands have this set up. My old VW rabbits and jettas had a valve in a similar location. A cable went from the heat control ***** in the car to the valve to control the amount of hot coolant coming into the heater core. My Jetta had 230k miles on it with the original heater core.

 

I was thinking exactly the same thing. However, the nice thing about the valve is that all you would have to do to reverse the mod would be to turn the valve to the open position. No screwing around re-routing hoses once the weather turns cold and it's time for heat again.

 

Standard stuff in the Super Duty/Excursions since 04 I think.

 

He's not stopping coolant flow, he's just stopping coolant flow through the heater core. Can you explain to me how that will blow hoses? I don't see it.

Grim