80 degrees without stat

This is the Forum for all your Citroen Technical Questions, Problems or Advice.

Moderator: RichardW

Post Reply
goodier
Posts: 51
Joined: 18 May 2004, 18:59
Location: United Kingdom
My Cars:

80 degrees without stat

Post by goodier »

xantia 1.9 td the car was overheating fan problems, took out the stat and it is still running at 80 degrees, any ideas new pump, new rad, new intercooler.
Stuart McB
Posts: 1635
Joined: 03 Oct 2003, 00:50
Location: United Kingdom
My Cars:
x 1

Post by Stuart McB »

Any temp gauge variation at all? Up or down as you're driving. And any difference in air through heater vents etc?
goodier
Posts: 51
Joined: 18 May 2004, 18:59
Location: United Kingdom
My Cars:

Post by goodier »

temp seems to go up when going faster but drop your speed down and the temp drops leave car ticking over and it goes to just over 80 and fans kick in, but running wrong way wired up wrong but dont think this is causeing the temp problem
bxbodger
Posts: 1455
Joined: 23 May 2003, 03:34
Location: Lovejoy country (Essex!!)
My Cars:
x 1

Post by bxbodger »

Are you sure you actually have a problem?? is the gauge is working properly? 80 degrees is not hot at all- its only just warming up and at that temp the stat is not usually open- the fans should not even be thinking about coming on!!!
Temp should normally go up when caning down the motorway, probably to at least 95 deg, and drop when you stop, only picking up again if queuing for a long time. Even in the bleak mid-winter you should be running above 80 degrees.
pwatson
Posts: 263
Joined: 22 Apr 2001, 03:02
Location: E Midlands
My Cars:

Post by pwatson »

According to Haynes thermostat only starts to open at 89 deg and is fully open at 99deg. Cooling fans should only come on "before gauge needle enters red sector". 80 sounds very cool.
alan s
RIP 2010
Posts: 2542
Joined: 26 Jan 2001, 15:53
Location: Australia
My Cars:
x 6

Post by alan s »

<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by goodier</i>

temp seems to go up when going faster but drop your speed down and the temp drops leave car ticking over and it goes to just over 80 and fans kick in, but running wrong way wired up wrong but dont think this is causeing the temp problem
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
At 80 degrees that's not excessive although without the thermostat it possibly could be a bit cooler but this statement has me a bit confused. "....fans kick in, but running wrong way wired up wrong ..." because if the fans are wired up to run in reverse, you have the equivalent of a blanket over your radiator and that is why the temp is increasing at speed if the fans do kick in. The fans MUST draw air across the radiator to duplicate the effect of air passing over it when the car is in motion at a bit of speed. I would suspect that you may require a good system flush out as it is possible that the coolant isn't circulating as it should which could explain why the temp is rising with the speed of the car.
Suggest you flush the system or have a radiator specialist do it for you and fix the direction of rotation of the fan which is really quite simple on a 12V DC system; there will be two wires going to the fan, simply reverse them and that will reverse the direction of the fan motor.
Alan S
Post Reply