There are some conditions in servicing cooling module at Citroen C 25. For filling up the system you will use 9.5 liters of special Green coolant type. Don’t underestimate the importance of Citroen’s 1.9 engine cooling system. There is no chance 1990 C 25 engine will work efficiently with bad cooling. In 1993 the company produced vehicles with 1.9 engine having code of D9B(XUD9A/U).
It will be advantageous to follow Citroen’s rules for 1987 C 25 service. To endure car life take only Green antifreeze and pour not more or less than 9.5 liters. Providing you keep the rules 1.9 motor installed in C 25 of 1992 year will be long lasting. It’s obvious that every 170C(XN1T) motor needs good service as stated by Citroen in instruction.