ZINGGG

1996 XJ 4.0L

Firstly, should this small line be hooked up to anything? It runs from the firewall and is currently tucked by the washer fluid bottle. It has vacuum, isn't plugged either.

Next, my heater was bypassed by the PO and has been that way since I've owned it for the past year. I'm going to be replacing the heater core, blower motor and blower motor resistor in the next couple weeks hopefully because I'd like to have heat this winter. Now my question, can anybody tell me exactly what heater hoses I will need? Ideally, I'd like to do without the heater control valve. Can I just use the heater hoses from a 97-01 since they did away with the valve? Or do I need to buy it by the foot and measure and cut it?

Anything else I should consider replacing with the dash apart?

SeriousOffroad

yep, needs to be connected to your vacuum ball and intake manifold. Gotta be a lonely male t-fitting in there some where......

peep

It runs to a vacuum dashpot diaphram on the heater hose. When you go to heat the vac opens a gate valve in the heater hose, when you slide from heat to coool at the dash control, it closes the valve, reduces the hot water flow thru your heater core. If the valve is still in place on your heater hose, then plug that onto the little tube back of the valve. If the valve is removed by a PO, then stick a screw in that to stop the vac leak.

SeriousOffroad

No Coolant valve on a 96, IIRC.

peep

K. Your right, that line has to find a home.

ZINGGG

Is it possible it's supposed to hook up to something on the heater control valve? Which mine doesn't have because the heater core is bypassed.

I'll look around more tomorrow in the daylight and see if I can find where it could possibly go to. I haven't been able to find anything yet though

rideordie66

That looks like it would go on the heater control valve. Since you don't have one because the previous owner took it out, plug it for now till you replace the heater core. Then put it back on when you get the proper heater lines and a new valve.

ZINGGG

I'll go ahead and plug it for now then.

I'm hoping to delete the heater control valve though. I don't want to deal with the leakiness of it that so many people experience. So I may just plug it and use heater hoses from the newer year XJs (can someone answer if they will work fine for an HCV delete for my year?)

cruiser54

That's the best plan.

ZINGGG

What do y'all prefer, aluminum or brass/copper heater cores? What *should* last longer?

ZINGGG

Ended up ordering an aluminum heater core. Waiting for all the parts from rockauto.com to get here. Will be installing next weekend so stay tuned for more questions.

Also, for those of you with a 96 and older XJ, the two heater hose part numbers to use in order to do away with the heater control valve are:
Gates 19038
Gates 19039
I didn't see that information anywhere on here so I just thought I'd throw that in

ZINGGG

Heater core, day 2. This sucks

jfats100

HAHA I'd rather take a running kick to the nuts then re-do the heater core

RTorrez1

When I removed my heater control valve on my older XJ's I just bought some bulk hose and replace with that much cheaper and didn't have to worry about trying to get the right size without the valve.
Good luck with your heater core change out.

ZINGGG

Right there with you buddy.

I'm starting to think I should done that. But oh well, this'll work