Xsara HDi running temp
Moderator: RichardW
Xsara HDi running temp
Hi,
Just a quick question for anyone with a Xsara HDi. What temp does the gauge show when the engine is fully warmed up?
I know these often aren't all that accurate, I just want a rough idea. Mine seems to stay around the 73-75 deg C mark, which seems a bit too cold to me?
Just a quick question for anyone with a Xsara HDi. What temp does the gauge show when the engine is fully warmed up?
I know these often aren't all that accurate, I just want a rough idea. Mine seems to stay around the 73-75 deg C mark, which seems a bit too cold to me?
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HDi may be a bit different to XUD in its warming habits as its head is rather different. The XUD is an indirect injection engine and combustion is initiated in a pre-chamber and then spreads into the cylinder. This means that there is a largeish combustion chamber nearly fully enclosed in the head - which will dump a considerable amount of heat into the head and then the coolant.
The HDi is a direct injection engine which means that the combustion takes place directly in the cylinder - so no pre-combustion chamber to absorb and dump heat.
This is the reason some of the Xantias have an auxilliary lorry or camper type diesel fuelled cabin heater which simply burns diesel for the benefit of the passenger's comfort.
The HDi is a direct injection engine which means that the combustion takes place directly in the cylinder - so no pre-combustion chamber to absorb and dump heat.
This is the reason some of the Xantias have an auxilliary lorry or camper type diesel fuelled cabin heater which simply burns diesel for the benefit of the passenger's comfort.
jeremy
The HDI engine has much better thermal efficiency - ie more energy from the fuel is converted into turning the crankshaft rather than heating the coolant than is the case with the indirect injected engine (Hence the better economy / performance). As Jeremy says though, this leaves less heat to run the heater etc. hence the slower warm up. Mine runs at a similar indicated temperature to yours once it has eventually warmed up. maybe 5 degc more but as you say these gauges aren't too accurate...
Ron
Ron
2007 C6 2,7 HDI exclusive 95k
2004 C5 VTR HDI 103k
2004 C5 VTR HDI 103k
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Agree, HDi engined Xsara takes an age to warm up compared with other Cits we had. Was convinced the thermostat was stuck open - but its not. Once warm shows 70 -75 deg but I don't consider gauges to be accurate just an indicator of whats happening. If its steady I'm happy regardless of the relative reading. If its moving once the car is warm (especially up) I worry.
Regards
Rory
Regards
Rory
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