Jeepman659

My heator core valve keeps leaking this would be a no brainer problem usually just replace it. but the problem here is i've went through two brand new ones. and there both leaking where the upper and lower portions meet at that little crease. anyone have any ideas maybe i'm putting the houses on incorrectly? I'm at a loss because i'm almost 100% sure that's how they go on. and I really don't know why it's happening on TWO brand new valves...

RTorrez1

If you are talking about the heater control valve just remove it. You don't need it. On the later years the manufacturer deleted them all together. Just by pass it. I have done just that on my other XJ's that had them. You will not have any more problems with it.

Jeepman659

What did it control then? and wouldn't there be a vacuum leak there's a line leading to it? also would I connect the upper to the opposing upper hose? and the lower to the opposing lower?

cruiser54

All it did was shut off the flow of coolant to the heater core with AC on.
The heat in the cabin is controlled by a blend air door. Ditch it just like I did on all 3 of my Jeeps in Arizona.........

djb383

The nipples on the heater core are 2 different sizes....5/8" and 3/4". Measure the length of new hoses and buy them at any auto parts store "by the foot". Plug/cap the air/vacuum line.

xjrob162

So the hot coolant wont cause the air to be hot coming through the vents?0

cruiser54

It's that easy.

cruiser54

No. That's what the blend air door does under the dash.

djb383

A little less hose clutter when the HCV is eliminated.

Jeepman659

okay thanks guys. but about the coolant lines themselves do I connect the ones across from each other? or is it better to just go and get some new line and connect them directly to the heater core?

Jeepman659

nvm DJB showed me what to do I missed that as I was posting previous post...

thakmfb

I removed mine as well. A) one less thing to break and leak out on the trail B) I think of it as a little bit more of a radiator ad thats all the heater core is, is a small radiator. So I feel you are gaining a little engine cooling from it as well. And as we all know these Jeeps need everything they can get as far as cooling.

cruiser54

Another bonus is that coolant is flowing through the core and there is less likelyhood of crap building up in it.

The real bonus for me was not ever worrying again about bumping one on a hot engine, having it split, and spraying me in the face with 210* coolant.

Jeepman659

what would be the best and longest lasting way to cap the vacuum lines?

djb383

Rubber vacuum caps are available at auto parts stores in lots of sizes.