Temperature on my 406 1.9 td

[zokiopp]

I have noticed that my engine temp when car is warm cant get more than 78/80 c and it shud be 90. Although, the heater is awesome and can get very warm inside the car real fast and it doesnt go cold even if i leave the car for like 2-3 hours. Is this temperature normal? its winter here so around 5=9 degrec c. Also, i think im noticing abit poor fuel economy and have no idea how to fix it. Also I see a small white cloud on some starts in a day. Engine is running good, good performance. Changed air and fuel filter.

[rwb]

My 1.9 was like that.
One the motorway in the winter it would go cooler and I couldn't get warm enough air out of the blower to keep the windscreen clear

My HDi 90 always went straing up to 90 and stayed there.

I was worried about my 407 which only gets up to about 85. It turns out it's due to the temperature at which the thermostat opens.

[zokiopp]

but, i have a good heat in inside and the temp is 70-78 max on the gauge lol. thats what im trying to resolve. is it the thermostat or the gauge.

[PeterN]

If your heater is working well the chances are that the gauge is reading low probably due to a faulty sensor, you can check it by placing a thermometer on the head somewhere when its at normal running temperature.

Peter

[Busman]

I do have a habit of changing the thermostat on all cars that I acquire. They only cost £5 or less, and it's one less thing to worry about.
While I'm in there, I often change the coolant as well.

[Rolebama]

The 1'9s do suffer from being affected by ambient temperatures. It is a common complaint. Although on the positive side, they do not 'waste' fuel making heat for creature comfort, so do tend to give a better mpg.