I hope I'm posting this in the right section...forgive me if I'm not.
Since I've owned my van (about 6 mos.) it's had an odd heating problem. The temperature gauge would always go to HOT evertime you first left in the morning, or coming home from work (after sitting a while) and stay there for a short period (maybe a minute) then go to COLD, then go to normal. I figured it was either a T-stat problem, or a blown headgasket. It didn't bother me too much, since I planned on replacing the head and t-stat anyway.
Well, it now has head, headgasket, t-stat, and temp sensors all swapped out, and it is still acting very strange. The temp is all over the place as soon as you take off, it will eventually settle out just below midway of the gauge.
But, I now have NO HEAT!!
I removed the lines right at the heater core and flushed just the heater core with full garden hose pressure...seemed to be just fine. I just got back from a drive though, and the lines going to/from the heater core are barely warm, but the radiator hoses are hot. The gauge is still all over the place.
Any ideas?
Thanks!