Car is question:
2001 156 Sportwagon 1800 TS
Fired up the Alfa this evening and watched in horror as the temp gauge shot up close to the red. I turned the heater fan on but there was no hot air, the rad fan was going but it didnt seem to be doing anything...
After a while the heater warmed up and brought the temp down a bit but still above normal (90). Water level was checked and all was normal.
I went for a drive and the temp gauge went up to above 110 then down when I put the fan on, etc. It never overheated but was still never dropping below 100.
Here's the strange bit. When I felt the radiator it was stone cold. However the top and bottom pipes were warm, how does that work?? The top pipe was also under a fair amount of pressure. When I turned the engine off the top pipe got MUCH hotter, almost too hot to touch.
My first suspicion was the whole radiator was frozen and no water was getting through, the antifreeze was fairly diluted but wasn't frozen elsewhere (header tank). I bled the rad from the overflow and topped up with concentrated antifreeze, the water that came out of the bleed screw was hot and but the rad was still stone cold!! WTF?!
Ran car again but same symptoms, I just can't figure it out...
'01 Alfa 156 SW 1.8 Twinspark - grown up car
'77 Fiat X1/9 zx6r carbs, megajolt, Eurosport/Dallara Body - play thing/project
'91 Honda Civic - Autotester - GONE!