Like many TJ owners I'm getting open cell black foam from my AC vents. For those who have never seen it it is similar to the foam used in filters for computer chassis cooling fans (although probably made of a tougher polymer). I also have developed a leak in my heater core and will need to tear the dash apart to install the new one. So the questions are:
- What exactly does this open cell foam do?
- Is it worth replacing while I'm in there?
- If it is not readily available from Jeep is there a good replacement?
My A/C does not appear to be blowing as cold as it used to, but I do see some oily residue on one of the A/C hoses. Is it common for the hoses on a 2001 to go bad (my jeep lives in the hot weather of the southeast). It looks to be a fairly extensive hose, and I'm a little afraid of what the replacement cost might be...