Citroen Xantia coolant temperature is extremely hectic!!!
Moderator: RichardW
Citroen Xantia coolant temperature is extremely hectic!!!
Hello, my 1999 Citroen Xantia 1.8 16v manual started to act extremely strange. The engine coolant temperature rises nicely and gradually until around 80C then all of a sudden it picks up speed and in like 20-30sec rises extremely fast and reaches around 100-105C and then after couple of seconds drops too normal temperature in like 10 seconds and doesn't act up for the rest of the journey(doesn't reach higher than 90C). It seems to be doing that only when starting the car after it was sitting for quite some time, for a day or so aka. when the engine is completely cold.
- white exec
- Moderating Team
- Posts: 7445
- Joined: 21 Dec 2015, 12:46
- Location: Sayalonga, Malaga, Spain
- My Cars: 1996 XM 2.5TD Exclusive hatch RHD
1992 BX19D Millesime hatch LHD
previously 1989 BX19RD, 1998 ZX 1.9D auto, 2001 Xantia 1.8i auto
and lots of Rovers before that: 1935 Ten, 1947 Sixteen, 1960 P5 3-litre, 1966 P6 2000, 1972 P6 2000TC, and 1975 P6B 3500S - x 1752
Re: Citroen Xantia coolant temperature is extremely hectic!!!
Sounds like a 'sticking' thermostat, rather than one that operates smoothly and progressively.
Probabably best to replace it first, then go from there.
Probabably best to replace it first, then go from there.
Chris
Re: Citroen Xantia coolant temperature is extremely hectic!!!
Was thinking of that, but it was replaced 10000km ago... Could it be deffective?
- white exec
- Moderating Team
- Posts: 7445
- Joined: 21 Dec 2015, 12:46
- Location: Sayalonga, Malaga, Spain
- My Cars: 1996 XM 2.5TD Exclusive hatch RHD
1992 BX19D Millesime hatch LHD
previously 1989 BX19RD, 1998 ZX 1.9D auto, 2001 Xantia 1.8i auto
and lots of Rovers before that: 1935 Ten, 1947 Sixteen, 1960 P5 3-litre, 1966 P6 2000, 1972 P6 2000TC, and 1975 P6B 3500S - x 1752
Re: Citroen Xantia coolant temperature is extremely hectic!!!
It's possible, but would be my first suspect, and needs eliminating.
Chris
Re: Citroen Xantia coolant temperature is extremely hectic!!!
Hmmm... How about the blue sensor on the housing near the thermostat. Can it be acting up and showing false readings?
- white exec
- Moderating Team
- Posts: 7445
- Joined: 21 Dec 2015, 12:46
- Location: Sayalonga, Malaga, Spain
- My Cars: 1996 XM 2.5TD Exclusive hatch RHD
1992 BX19D Millesime hatch LHD
previously 1989 BX19RD, 1998 ZX 1.9D auto, 2001 Xantia 1.8i auto
and lots of Rovers before that: 1935 Ten, 1947 Sixteen, 1960 P5 3-litre, 1966 P6 2000, 1972 P6 2000TC, and 1975 P6B 3500S - x 1752
Re: Citroen Xantia coolant temperature is extremely hectic!!!
The blue sensor does feed the gauge. It could be misbehaving, or maybe just a poor contact.
Chris
Re: Citroen Xantia coolant temperature is extremely hectic!!!
It is quite strange, because when that "thing" happens the temperature gauge moves fast.. unnaturally fast.. thats why im thinking of a sensor.. but sticking thermostat is possible aswell
Re: Citroen Xantia coolant temperature is extremely hectic!!!
And also it happens just once.. once the temperature rises quickly and drops quickly it stays on a normal operating temperature and doesn't act up or anything.
-
- Donor 2023
- Posts: 2625
- Joined: 24 May 2007, 10:11
- Location: poole dorset uk
- Lexia Available: Yes
- My Cars: C5 X7 2009 2.0 HDI VF7**************[VIN obfuscated, can be read by forum staff]
C4 2010 2.0 HDi Exclusive VF7**************[VIN obfuscated, can be read by forum staff] - x 378
Re: Citroen Xantia coolant temperature is extremely hectic!!!
It is not unknown for replacement thermostat to be defective straight out of the box.
Do the cooling fans both kick in when the temp gets to 100+ ?
If the temp gauge is normal for the majority of the time in normal use then i would also suspect the thermostat being a little sticky
Colin
Do the cooling fans both kick in when the temp gets to 100+ ?
If the temp gauge is normal for the majority of the time in normal use then i would also suspect the thermostat being a little sticky
Colin
-
- Donor 2023
- Posts: 2625
- Joined: 24 May 2007, 10:11
- Location: poole dorset uk
- Lexia Available: Yes
- My Cars: C5 X7 2009 2.0 HDI VF7**************[VIN obfuscated, can be read by forum staff]
C4 2010 2.0 HDi Exclusive VF7**************[VIN obfuscated, can be read by forum staff] - x 378
Re: Citroen Xantia coolant temperature is extremely hectic!!!
Posted my reply as OP was posting so does look like sticky thermostat if guage is reading normal for the remaining time
Colin
Colin
Re: Citroen Xantia coolant temperature is extremely hectic!!!
They do kick in when the temperature acts up and reaches temperature of fans kicking in, but temperature doesnt stop climbing and reaches quite above the fan engagment temperature... After few second it drops almost instently to around 80c and ofcourse fans stop working.
After all that non sense happens.. temperature reaches Reaches "fans temperature" nicely and progrresivlly and when they do turn on it doesn't go higher and drops off in minute or so
After all that non sense happens.. temperature reaches Reaches "fans temperature" nicely and progrresivlly and when they do turn on it doesn't go higher and drops off in minute or so
-
- Donor 2023
- Posts: 2625
- Joined: 24 May 2007, 10:11
- Location: poole dorset uk
- Lexia Available: Yes
- My Cars: C5 X7 2009 2.0 HDI VF7**************[VIN obfuscated, can be read by forum staff]
C4 2010 2.0 HDi Exclusive VF7**************[VIN obfuscated, can be read by forum staff] - x 378
Re: Citroen Xantia coolant temperature is extremely hectic!!!
Another random thought is maybe the coolant needs changing, not sure when it was last changed but sediment can stop a new thermostat working correctly.
If the guage is showing the right temp then the sensor is doing its job, if it was the sensor it would ( hopefully) be playing up on a random basis.
This seems to be a thermostat being weak to open but once open doing its job and the fans kicking in means that the rest of the system is working as intended.
Colin
If the guage is showing the right temp then the sensor is doing its job, if it was the sensor it would ( hopefully) be playing up on a random basis.
This seems to be a thermostat being weak to open but once open doing its job and the fans kicking in means that the rest of the system is working as intended.
Colin
Re: Citroen Xantia coolant temperature is extremely hectic!!!
The thermostat and the coolant has been changed 10k km ago.. but if its the case... Will do that again
- xantia_v6
- Forum Admin Team
- Posts: 9084
- Joined: 09 Nov 2005, 22:03
- Location: France or NewZealand
- Lexia Available: Yes
- My Cars: -
1997 Citroen Xantia V6 (France)
1999 Citroen XM V6 ES9 (France)
2011 Peugeot 308 CC THP 155 (NZ)
1975 Jaguar XJ-S pre-HE (NZ) - x 834
Re: Citroen Xantia coolant temperature is extremely hectic!!!
Maybe you should invest in a cheap IR (infra-red) thermometer so that you can measure the actual temperature at the thermostat, to localise the problem.
- white exec
- Moderating Team
- Posts: 7445
- Joined: 21 Dec 2015, 12:46
- Location: Sayalonga, Malaga, Spain
- My Cars: 1996 XM 2.5TD Exclusive hatch RHD
1992 BX19D Millesime hatch LHD
previously 1989 BX19RD, 1998 ZX 1.9D auto, 2001 Xantia 1.8i auto
and lots of Rovers before that: 1935 Ten, 1947 Sixteen, 1960 P5 3-litre, 1966 P6 2000, 1972 P6 2000TC, and 1975 P6B 3500S - x 1752
Re: Citroen Xantia coolant temperature is extremely hectic!!!
Trapped air in the thermostat (water outlet) housing could cause gauge sensor (or maybe the thermostat) to be erratic, but not a place where air usually gets trapped. Is there a bleed screw (or expansion/venting hose) located there?
Chris