01 Sable - 3.0 Vulcan - 100K
First Post - First let me say thank you to everyone on this site. It has been very helpful over the past couple weeks. I hope to do a little write up on the headlight harness to "pay it forward".
Issue: My wife says she didn't have much heat. I check, and sure enough, coolant is very low (gone). The tank was dirty enough that it looked like there was some in it, but nothing inside. Since it has just cooled down enough to need heat I don't know how long it has been low. Still don't know where it went, but figured that was a lesser priority.
Put anti-freeze in it, and still not much for heat. After some searching and reading on here, I believed that I would first try to flush the core since it did not seem to be leaking. Since the vehicle also has a exceedingly loud belt squeal at times, and the waterpump seemed to have a little excess end play, I decided that I would do that as well. This would eminate another suspect.
I flushed the core per the Clinton thread, it was dirty, but not as bad as I would have thought. The pump was in ok shape, still had a good portion of the impeller not rusted away. The new one had much less endplay and the bearing felt much better. Also put in a thermostat while I had her drained.
After getting it all back together, idled and had decent heat (for just warming up). Went for a 5-10 min drive and had great heat for a little bit, then it just went cool. By the time I get back to the house, it was pretty warm again. Come back to the house to check coolant level...very full hot. Shut it off for dinner, came back and went for another drive, same thing.
Took it to work today, 40min drive, full heat and full fan the whole way. I was warm, but it didn't heat me out of the car like I know it should.
Anyone have a suggestion? Could I have air in the system? I couldn't have put the t-stat in wrong or something? BTW...still have the horrible belt squeal.
Sorry for the book.
2001 Merc Sable - Grandma Gold