1994 940 heater core

It sounds like your heater core is leaking, and will have to be replaced. I don't know how difficult it is to replace on your car. Hopefully, the core has an access door for removal. On some cars the dash has to come out to replace the core. It's a major pain when that is the case. Good luck.

there is only so many things that can cause this and are you sure its anti-freeze and not washer fluid.just something else.a damaged heater core is usually what causes a leak inside the car.when the heater cores were replaced did the shop say there were signs of them leaking or couldn`t see anything.the other is coolant from a previous leak could have spray aroung the air ducting in the dash and has finally found a way out.but this should have been gone shortly afterwards and usually there is only a mist that is sprayed into the air ducts which usually shows up on the inside of the windows,so i don`t think this is the problem.if the hose clamps are loose were the hoses are fastened to the heater core spigots/tubes it could be leaking inside the cars air duct.and yes its unusall for anti-freeze to leak onto the drivers floor but stranger things have happened.

That's the return pipe to the pump from the heeater core.It's leaking at the pump? Is it leaking
from the hose that's clamped on,do you think? That is probably a pressed fitiing into the pump
and if it is leaking around the fitting, and the pump has over 30,000 miles on it, I'd just bite the bullet and replace the pump.
I know.....on a 3.8 it isn't the easiest job. (:^) don-ohio

Sounds like you may have water leaking out of your heater core.

This will cause an overheat condition, which you get because your engine cooling system can't pressure up as well.

You may also notice a kind of "sweet" smell to the air that comes from the air vents that blow when A/C or heater is on.

As water leaks into the A/C & Heater core compartment area...it trickles to the overflow drainhose on the firewall. This is usually intended for the condensation of the A/C core but a leaking heater core will drain that way too.

From what I hear, I'd see about disconnecting the heater core hoses going into the firewall and maybe use a splice to connect them to each other OR get a two 5/8 bolts and a couple clamps and plug the hoses.

This allows you to drive car without overheating and buys some time to get you another heater core (basically a "mini-radiator") Its summer, so you don't need the heater right now but keep in mind...you won't have a heater until the core gets replaced.

Hope this helps...

The evaporator is located in the heater box, it is the AC's equivalent of a heater core. Water is a NORMAL by product of refrigeration, and the clear water must leak out to the ground.

Typically if your leaking coolant inside the car, it indicates your heater core is split and leaking. Replacing the heater core is quite the job. It requires removal of the dash board and heater box. i replaced one in a 97 Cirrus at work last week and it was a 6 hour job. If your not mechanically inclined i would definitley recomend phoneing around for quotes to local auto repair shops and getting it done profesionally.

most likely cause would be your heater core instructions below!


If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing

• The heater housing is usually under the dash and must be removed to gain access to the heater core.
• Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.

The heater housing is disassembled to get to the heater core.
Heater Core

• Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
• Remove the heater coolant hoses.
• Remove the cable and/or vacuum control lines (if equipped).
• Remove the heater core securing brackets and/or clamps.
• Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
• To reinstall the heater core, reverse the removal steps.

When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

You can temporary run one heater hose into the other- either just take one side off the car and route the one hose right back into the water pump or - you can get a kit -
Either way - now you will need to replace the heater core inside the car.

Hi,

If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing

• The heater housing is usually under the dash and must be removed to gain access to the heater core.
• Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.

The heater housing is disassembled to get to the heater core. Heater Core

• Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
• Remove the heater coolant hoses.
• Remove the cable and/or vacuum control lines (if equipped).
• Remove the heater core securing brackets and/or clamps.
• Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
• To reinstall the heater core, reverse the removal steps.

When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

Let me know, if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya and have a nice day!!

A good place to find such information is at WWW.AutoZone.com.
You can select your make and model of vehicle, go to the "how to" section and in many cases it will give you the instructions for replacing various parts and it is free.
AllData.com is another resource that you will pay less than $30 a year for your first vehicle, it is an on-line service manual web site, very good.
Below is the procedure for replacing your heater from the Auto Zone site.
Good luck, let me know.
Regards,

If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing

• The heater housing is usually under the dash and must be removed to gain access to the heater core.
• Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.

The heater housing is disassembled to get to the heater core.
Heater Core

• Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
• Remove the heater coolant hoses.
• Remove the cable and/or vacuum control lines (if equipped).
• Remove the heater core securing brackets and/or clamps.
• Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
• To reinstall the heater core, reverse the removal steps.

When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.