iloveyulya1

Hi can someone help me find a reason why could be my car running so cold. Could it be my thermostat being stuck or something else.

When it started getting cold, I went to Autozone and bought myself one from what they carry, but what happened was it kept overheating after, and i kept trying to air bleed but it still was going over in period of time. And i put the old one back because i wasnt happy with this one. Right when i installed the old one everything went back to what it used to be.

turbo510

Avoid the AutoZone parts if actual OEM-quality parts are available. So you had the cold-running thermostat out? Was it opened a little at room temperature? It doesn't take much for the engine to not warm up. A Behr thermostat, from Autohausaz.com for instance, is less than $16.

iloveyulya1

well they gave we what they had. I've spent a gallon of g12 at dealers.. I though it wasnt enough and ran out of that. Cold running thermostat was on when i got the car and its oem one, i can see on it. After that i replaced it with aftermarket one. But i tried everything and decided to go back. So you think i should but another one but oem? What about on Germanautoparts

mtroxel

Judging from your dashboard, this is a 96/98ish A4 right? If it was a little later the climate control would be able to tell you the exact temp of the coolant. See here to see what I mean.

The gauge in the dash of my 99.5 seems to have a casual relationship with reality. If I watch my climate control screen, the water goes up to 90C and never moves. Meanwhile the gauge differs depending on ambient air, girlfriend's mood, the color of my shirt........hell I dunno.

If I'm right, that your car is too early to be able to read the water temp in the climate control, it would be interesting to put a VAG-COM on it while the gauge is looking the way it does in your picture.

Reggie

I think the sensor can go bad too. You might want to look at them. On the 2.8 there are two - one for the gauge and one for the ECU. I agree with mtroxel get a Audi replacement one - they are cheap.

iloveyulya1

ill post some vag com results soon. But im thinking of buying that thermostat, But only oem.

AudiMick

Actually there are two sensors for the Audi 90, on the 96/97 AFC A4 there is one sensor with two separate outputs (4 pins).

I think he probably has a 97 four cylinder, as swapping out thermostats is a longish job on the V6 and he has apparently already accomplished this twice.

I wonder if his parts store thermostat has a bleed vent like the OEM.

The OEM also fails open rather than closed like most aftermarket ones.

iloveyulya1

i dont know. But the oem looked so much serious. Its bigger as well. But see its too cold in that car.

mtroxel

If the heater's not putting out much heat and your gauge looks low, you've got a stat problem.

iloveyulya1

it was giving good heat with another thermostar. but it was overheating and even if i bleed it it still keep overheating. It was awful.