Coolant leaking to the inside of cabin.
The a.c.and heater cores that you speak of are inside the cabin behind the glove box. But that's the location, to access them the whole dash must be removed. its worth replacing a few problem parts once you open up the case that holds them, like both cores and the blend door
SOURCE: The heat in my 1992 Jeep Wangler is not working.
Hi!
It
appears we have an Air lock scenario and you will need to perform a
system Bleed.
Park
the vehicle on level ground, when cold remove coolant filler cap,
start engine and leave to idle, turn heater on full and blower to
max. When engine reaches operating temperature watch and listen near
coolant filler, keep clear as gurgling and hopefully a boil over
should occur. Top up with very warm coolant and wait as it may do it
again.
Check
for heat inside vehicle if warm replace coolant cap but keep an eye
on temperature gauge as the ~Air lock may have moved on from heater
matrix/core so proceedure needs to be carried out again from COLD.
If
persistent boil ups/over attention must made in the cylinder head
or
gasket area, or possibly water pump?
Please
press the Blue button to appraise my FREE Efforts, Thank You!
Paul
'W' U.K.
SOURCE: heater core for my jeep grand cherokee 2000 is
you need to change heater core(check couplings and lines before!!!) or if you don`t wan`t to buy another heater core you can bypass it just put hard line between lines but you not going have hot air inside the car if you bypass it
SOURCE: where to replace coolant temp sensor for 1998 grand jeep cherokee
Check this image...
...in the Section ZJ-Secc-8D-Ignition-Systems (page 5, fig. 10 and 11).
Good luck.
SOURCE: I have 2001 Jeep Grand Cherokee Laredo and it is leaking coolant
Front drivers side could be a bad cap, lower hose or the radiator itself. You need to look carefully and find the leak source. Steam travels and isn't a good indication of where the actual leak is coolant will run down and take any path it can to reach the ground. Therefore, you need to follow it back to where it is coming from, then deal with it. Your water pump can also leak and run down the lower hose. there is a small hole in the pump behind the pulley. If you see coolant coming from there the pump needs to be replaced. Sealers will not work on hoses or pump leaks so don't bother using them for that.
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