Citroen Xantia 1.9 Turbo Diesel 1996

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Re: Citroen Xantia 1.9 Turbo Diesel 1996

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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by scropionking »

Hi,

An update, fitted radiator and car running again. However the temp was only getting up 75 on the gauge, so I assumed possible thermostat failure, opening to early. Have replaced with a new one which is 82 degrees but temp still not climbing above 80 Thermostat is defenitly opening as top hose is getting hot, but the temp just not registering at gauge properly. So I've checked to see whether the fans are coming on, but they are not. Could this be the thermostat sensor or something else. Any help would be appreciated.



Thanks

Kevin
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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by GiveMeABreak »

Your low Fan speed will only come on at 92 °C and the high fan speed at 97 °C for a Series 1 XUD 1.9 TD

Or at 90 °C and 101 °C respectively if fitted with a Bitron Box with A/C.
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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by scropionking »

Hi Marc,

Are you saying not to worry, I know before the fans were cutting in around 85 mark, obviously with a radiator leak. But I still expect the engine to reach normal temp, I was in some heavy traffic today but the temp still didn't go any futher than 80 i know the weather is colder at present but it should not effect engine temp that much. My car does have AC, what is the briton box it's obviously on the car somewhere.. I did bleed the system off through the bleed screws, could it be an air lock. It used to go just above 85 all the time and fans would cut in. The other thing is what is the right thermostat for this model, seems everywhere I've checked is from 80 to 82 83 and 85
on every car part site including Mister auto.


Thanks

Kevin
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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by GiveMeABreak »

Pop your VIN up (or your reg if you don't have it).
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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by white exec »

There are multiple temp sensors/senders on the engine, all on the water outlet/thermostat housing:
'96 Xan 1.9TD water outlet.JPG
These control separate functions, eg:
- injection ECU control
- water temp control unit (Bitron), for fan operation
- temp gauge ('dial')

So it is possible for the gauge to mis-read, even though everything else is ok.
Thermostat is listed as 83°C.
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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by GiveMeABreak »

There are various setups on the 1.9D XUD - depending on the variant of the engine and with / without A/C, but the thermostatic regulator on all these opens at 83 °C as Chris notes.
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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by white exec »

Kevin posted his VIN earlier, Marc: VF7**************[VIN obfuscated, can be read by forum staff].
That cooling parts diag is for it.
Chris
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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by scropionking »

Hi thanks everybody for your help,

Good pictures Chris thanks, I will check tomorrow, see how many sensors it has. And probably should check fuses also as needed to remove plug from A/C. The car has never ever been upto 90 degrees, not in the three years
I have owned it, not even in the summer. Fans always cut in about 85.


Thanks

Kevin
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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by GiveMeABreak »

Thanks Chris.

Thought I'd put this up for good measure - the cooling circuit For Kenny's Xantia - there are 6 of these circuits, but this one should be correct from the RPO and VIN:

Click picture to magnify and clarify.
Kenny 19D Cooling A.PNG
(1) Bleeding the cooling system.
(2) Radiator drain screw.
(3) Coolant temperature sensor Warning and gauge.
(4) Coolant temperature sensor Bitron box - Pre-warning.
(5) Coolant temperature sensor injection .
(6) Coolant temperature sensor Engine cooling fans.
(7) Thermostat.

Here is the data for your vehicle with A/C and the BITRON unit for info:
Vehicle type-Colour identificationFan : Slow speedFan : High speedEngine hot (refrigeration authorised)Air conditioning cut-offPre-warningWarningPost-cooling (temperature and operation time) : degreesPost-cooling (temperature and operation time) : Time
Turbocharged DieselWith air conditioningviolet90 °C101 °C70 °C112 °C115 °C118 °C101 °C6 mn
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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by Michel »

scropionking wrote: 22 Jan 2019, 18:03 Hi thanks everybody for your help,

Good pictures Chris thanks, I will check tomorrow, see how many sensors it has. And probably should check fuses also as needed to remove plug from A/C. The car has never ever been upto 90 degrees, not in the three years
I have owned it, not even in the summer. Fans always cut in about 85.

Thanks

Kevin


I'd not trust the accuracy of the gauges that much. I've had 9 TDs and they all read slightly differently.
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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by scropionking »

Thanks Marc,

Will go through everything tomorrow, thats a good picture too and if I'm not mistaken there it shows the thermostat the other way around. Yet when I look on diagrams and been taught spring side always goes to the engine side and top triangle facing radiator. I can't see it going in any other way, but this diagram shows otherwise. This can't be right surely.

Thanks

Kevin
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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by GiveMeABreak »

Like I said Kevin, there are 6 circuits and these changed based on build number:
Kenny Cool 1.PNG
Kenny Cool 2.PNG
Kenny Cool 3.PNG
Kenny Cool 4.PNG
Kenny Cool 5.PNG
Kenny Cool 6.PNG
Key to the Diagrams:
Circuit No.Vehicle typegearboxair conditioningValidity
1atmospheric dieselMechanicalWithoutUp to number OPR 6355
2atmospheric dieselMechanicalWithUp to number OPR 6355
3atmospheric dieselMechanicalWith or withoutFrom OPR 6356 number
4atmospheric dieselautomaticWith or without-
5Turbocharged DieselMechanicalWith or withoutUp to number OPR 6355
6Turbocharged DieselMechanicalWith or withoutFrom OPR 6356 number
Your build number is 07158 from your VIN, so would be number 6, which is the one I posted before, so this might clear up the confusion and another reason why VIN is key as there were so many mods and changes on these throughout production. :-D
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and lots of Rovers before that: 1935 Ten, 1947 Sixteen, 1960 P5 3-litre, 1966 P6 2000, 1972 P6 2000TC, and 1975 P6B 3500S
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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by white exec »

The temp sensor connectors have been known to be colour-coded thus:
Injection (engine ECU) - Green
Water temp control unit (Bitron) - Brown
Gauge - Blue

Might help differentiate.
Pull the Blue one, and see whether it affects the gauge.
With engine running, pulling the Brown one usually puts fans on to full speed. (You might have to turn IGN off and then on again to return to normal.)
Chris
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Re: Citroen Xantia 1.9 Turbo Diesel 1996

Post by GiveMeABreak »

The Bitron Box Temp Sensor should be a 2-way Brown and the Gauge Temperature Sensor is a 2-way Blue connection (for this specific vehicle).
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Marc
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