Citroën C6

Coolant capacity & service interval

Citroën C6 coolant specifications cover a capacity range from 10.7 to 13.2 liters depending on the configuration. Four configurations are included in the data. The fluid type specified is coolant for normal use.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
C6 2.2 HDi DPF (2009-2011)
  • Use: Normal
  • Capacity 10,7 liter
  • Capacity 11,7 liter (with 4 zone airconditioning system)
C6 2.2 HDi DPF (2006-2009)
  • Use: Normal
  • Capacity 10,7 liter
  • Capacity 11,7 liter (with 4 zone airconditioning system)
C6 2.7 V6 HDi DPF (2005-2009)
  • Use: Normal
  • Capacity 13,2 liter
C6 3.0i V6 24V (2005-2009)
  • Use: Normal
  • Capacity 11,3 liter

Additional Notes

  • The Citroën C6 2.7 V6 HDi DPF (2005-2009) carries the largest cooling system capacity across the listed configurations, at 13.2 liters, which reflects the greater thermal load generated by a twin-turbocharged V6 diesel engine.
  • The C6 2.2 HDi DPF has two distinct production spans covered in the specifications — 2006-2009 and 2009-2011 — and both share identical cooling system capacities of 10.7 liters in standard trim.
  • When the 4-zone air conditioning system is fitted to the C6 2.2 HDi DPF, the cooling system capacity rises to 11.7 liters, an increase of 1.0 liter over the standard figure, indicating that the additional climate control circuit adds meaningful volume to the overall coolant loop.
  • The 4-zone air conditioning capacity variant of 11.7 liters applies equally to both the 2006-2009 and 2009-2011 spans of the C6 2.2 HDi DPF, meaning the specification carried over unchanged across the production revision.
  • The C6 3.0i V6 24V (2005-2009) has a cooling system capacity of 11.3 liters, which places the petrol V6 between the 2.2 HDi standard figure of 10.7 liters and the 2.7 V6 HDi figure of 13.2 liters.
  • All four rows are listed under a normal use condition, meaning the capacities stated apply to standard operating environments rather than a severe-duty or first-fill scenario.

Other Systems