I began this season with poor heat. I decided to get a new heater core. Still poor heat, except when I use recirculate. Recirc. Only blows out vents and fogs windows, but gets about 140 degrees.
I then changed thermostat and leaky water pump. Still poor heat. The old thermostat had some strange black gunk on it, but was working.
I changed the radiator next. Hoses looked good so I did not change them yet. Still poor heat except recirc.
I borrowed point and shoot style temp gun, and checked both heater hoses, and they were the same (about 130 degrees when I checked).
So it seems that the coolant has not changed temp in the core, yet if I use heat at floor, I get only 90 or so degrees no matter how far I go.
The place that did the core can't figure what can be wrong. They say the have never seen a bad heater core, but that is what I come up with.
What else could be the problem? Also, I have no smoke in the exaust and there are no dectable leaks.
Monday, February 20th, 2006 AT 10:06 PM