Yesterday, after I returned from church, I noticed that the floor on the passenger side of my 87 Jeep Wrangler was sopping wet. I mean water standing about 1/4" deep. I was dog tired from jet lag and thought 'screw it, I'll worry about it tomorrow'. I tried to smell it, but I have a cold and can't smell a darned thing, so I can't tell if there is any antifreeze in it or not (although I would think that I would be able to smell that, because I just drained and flushed the system for winter and put 50/50 in), or if it is just straight water. <img src="/forums/images/graemlins/confused.gif" alt="" />

Question: probably the heater core? I don't think it has ever been changed, so 20 years is a long time...

Where else could water come in from?

Thanks.

The first question to ask is...HAS IT BEEN RAUNING?
Then we ask... DID I WASH the Jeep?
If the answer is NO to both then we have one of two problems..
1. The heater core is leaking.. If we don't need the heat we can simply bypass the core till we can get around to repairing the core..
2. The A/C drip tube thru the firewall has a leak and the condensation is dripping into the Jeep. This can occur when the Heater is running and not necessarily only when the A/C is on..
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

I have bought a new heater core and tried to get the heater box out, but am bogged down. Haynes has crap instructions when it comes to the heater core and box. It claims that you don't have to take the dashboard out, which is great, but I am now stuck at trying to find the bolts/studs/nuts are that are attached to the firewall to take the heater box out. Where are these things? Haynes says 'look at illustration' and there isn't one...just a blown apart dwg that shows all the parts in the heater box.

Help!

Many vehicles have the nuts on the firewall under the hood..
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

Yeah, but where? I saw a couple on each side of the coil (at least I think that his where they are), and one that was down from there (again, ???). But the heater box doesn't move at all...

Sometimes on Jeeps, some of the heater mount bolts are hidden on he firewall behind the battery.

Got it figured out. It was in a previous post about a year ago, so that helped.

For anyone else that will tackle this sometime:

There are four nuts on studs:
1 is about 2-3 inches from the blower motor on the upper left hand side.

1 is about 1-2 inches from the blower motor on the lower right hand side (the blower motor being the reference point)

1 is directly below the coil

1 is about smack dab in the middle of the firewall behind the valve cover.

All are 7/16ths head nuts. Take the battery stand out of the jeep to reach the nut below the motor. Be sure to remove the condensation weep tube right next to the motor.

How hard would that have been to put in Haynes! <img src="/forums/images/graemlins/confused.gif" alt="" />

Once you figure that out, it is very easy to take the heater box out. Putting it back in is a tad of a challenge, but not that bad. Total time to remove, put in the new heater core, put back in, about 4 hours.

At some point it will be worth having the shop service manual.... It's worth it's weight in gold.. Throw that stupid Haynes manual in the trash and never buy another one for any car.... My Wife has her own Jeep 89 wrangler and a 84 Jeep Scrambler, after a whole lot of stupid investments like Haynes i decided to get the real deal for her ...God is she happy! For my 98 sport wrangler I bought a disk for it on E-Bay, which ended up being just as good as the service manual... I know this doesn't help your situation but a good manual that showes good illustrations will be a big help down the road...........