Anybody done a "Heater Bypass Mod" for better A/c on Ford PSD?

[newbury]

I just ran across a thread on a Ford Forum about turning off the radiator hose that goes thru the heater core and getting 10 degrees more cooling in the cab of your truck.

The reason for doing this mod is to shut off the flow to the heater core while the A/C is running thus allowing for cooler A/C .

yet another mod done~PIC~ heater core bypass valve - Ford Truck Enthusiasts Forums

Apparently it can be as simple as installing one ball valve or can be easily gone further with a Ford Ranger valve and hooking into the vacuum system.

Has anyone here done that? How difficult was it compared to say changing a shock absorber?

Any down sides?

 

[aczlan]

Haven't done it, but it the ball valve version should be as easy as cutting the hose in half, sliding the barbs on the valve into both sides of the cut and tightening two hose clamps. You might see if a PEX shutoff valve is the right size. That will have the barbs already on it.

Aaron Z

 

[kennyd]

I did it in my old '92 F250 IDI with the vacuum operated valve, never noticed a difference honestly. I put this in category of what I call "mental mods" meaning you want to believe it makes a difference because you spent time and money doing it.

 

[davkir]

A lot of older trucks had a shutoff valve. (Usually mounted on the water pump outlet) None of these came with A/C of course.

 

[buickanddeere]

Only works if the factory heater valve was not 100% closing. Around here we need heated defroster operation morning and evenings to keep the windshield from fogging . Even in June, July and August .

 

[farm boy00]

Only works if the factory heater valve was not 100% closing. Around here we need heated defroster operation morning and evenings to keep the windshield from fogging . Even in June, July and August .

Where is that???