Muzzys AC hack.

[stevj]

wth is the point of the this bypass?

It's not a bypass. Study the picture posted above by @HSKR R/T in Post #31 of this thread.
A ball valve is inserted in a heater hose so that hot engine coolant can be stopped from going into the heater core. This allows your A/C to blow much colder.
I have done this mod to my 2019 Ram and the difference is quite noticeable.

Steve

 

[Gren71]

It's not a bypass. Study the picture posted above by @HSKR R/T in Post #31 of this thread.
A ball valve is inserted in a heater hose so that hot engine coolant can be stopped from going into the heater core. This allows your A/C to blow much colder.
I have done this mod to my 2019 Ram and the difference is quite noticeable.

Steve

man....I was planning on eventually going to the dealer to get it looked at for a possible warranty claim.

 

[victor1829]

These are the two hoses coming off the heater core on my 2022 3.6. The top arrow shows the hose going into water pump behind MGU. The bottom arrow shows the hose connecting to a double tee in the lower radiator hose.
View attachment 184987
Edit: There are more rubber hoses on this engine than I've seen on any other engine

So it goes in the top one and can I make it closer to the top to be more accesible?

 

[stevj]

man....I was planning on eventually going to the dealer to get it looked at for a possible warranty claim.

This kit was developed because in the early years of the 5th Gen, the only cutoff for heat was via the blend doors, and those weren't effectively closing off the heater core when heat was not required.
It is not a factory installed part.

So it goes in the top one and can I make it closer to the top to be more accesible?

It goes on the hose labelled ENG OUT, as pointed out by @theblet in post #20 of this thread.
That hose on the 5.7L engine is the output of the water pump to the heater core, and that's where you want to put it.

Steve

 

[Bigzway]

I had the tsb for the ac done 8 months ago it was covered by my extended warranty. It blows more and the ac is so cold I usually run the fan at the lowest speed at 100 degrees outside

 

[theblet]

My coolant is at the "min" level on the dipstick. Thought about adding more.

I see. Then get the mopar coolant 50/50 and just add some

 

[theblet]

So it goes in the top one and can I make it closer to the top to be more accesible?

You can add it on either one, yes. The eng out pipe is just the best place for it

 

[HSKR R/T]

So it goes in the top one and can I make it closer to the top to be more accesible?

It really didn't matter which hose it goes in. You will get the same effect. And if you don't mind cutting your factory hose, it can go wherever you want along the rubber hose.

 

[gomango392]

Folks, take your cabin air filter out! That's the real issue. The filter is too restrictive. I took mine out and the AC works like it should! My 4th gen was ice cold but it also didn't have a cabin air filter. Took the filter out of my 5th gen and I was amazed at how much better the AC was! Btw, the filter only has 7k miles it was brand new looking

 

[theblet]

Folks, take your cabin air filter out! That's the real issue. The filter is too restrictive. I took mine out and the AC works like it should! My 4th gen was ice cold but it also didn't have a cabin air filter. Took the filter out of my 5th gen and I was amazed at how much better the AC was! Btw, the filter only has 7k miles it was brand new looking

It definitely will make it blow harder, but not necessarily get cooler.

I replaced mine with a k&n. I just rinse it and don’t re oil. This way there is some filtration, but it still blows good

 

[gskowronek]

What years were affected by that issue? only early ones or all?

 

[theblet]

What years were affected by that issue? only early ones or all?

2019 -2020 models. I’ve attached the TSB here

 

[gomango392]

2019 -2020 models. I’ve attached the TSB here

My 23 had horrible ac till I removed the filter

 

[Tattoofever6971]

Trace that small hose and see if it goes into the firewall. On the Hemi, OUT from the water pump is the top hose which is in for the heater core. That's the hose you want

So you only need to block the one not both?
Reason I ask is I need to do a heater core but wanna wait till end of summer
If I only block off the input will the anti freeze still make its way back into the core thru other hose or should I block off both?

 

[Scram1500]

So you only need to block the one not both?
Reason I ask is I need to do a heater core but wanna wait till end of summer
If I only block off the input will the anti freeze still make its way back into the core thru other hose or should I block off both?

I'd block off both if your heater core is leaking. You could suck air bubbles into the coolant or have coolant back flow into the heater core when the truck isn't running

 

[Tattoofever6971]

I'd block off both if your heater core is leaking. You could suck air bubbles into the coolant or have coolant back flow into the heater core when the truck isn't running

Thank you much appreciated!

 

[theblet]

So you only need to block the one not both?
Reason I ask is I need to do a heater core but wanna wait till end of summer
If I only block off the input will the anti freeze still make its way back into the core thru other hose or should I block off both?

Just one should do it. The heater core hose is way too small, so the main engine coolant won’t only go through that. It uses the big hoses.

Edit: sry didn’t realize it’s leaking. You can definitely do both