Yeah Citroen had to issue a special service bulletin for the 1.6 Hdi to tell their own techies how to do an oil and filter change 
Managed to find the Citroen service bulletin for the 1.6 Hdi oil and filter change...
I think the important thing was to remove the silly upside down oil filter before the sump drain plug was removed to ensure that the dirty filter oil did not get dumped into the sump after the drain plug was refitted.
Managed to find the Citroen service bulletin for the 1.6 Hdi oil and filter change...
I think the important thing was to remove the silly upside down oil filter before the sump drain plug was removed to ensure that the dirty filter oil did not get dumped into the sump after the drain plug was refitted.
Quote:The engine oil temperature must be at least 50°C :
- the engine oil temperature is considered to be at 50°C when the water temperature indicator is between 80°C and 90°C or the cooling fan has cut in
• ensure that the vehicle is level (side to side and fore and aft)
•
remove the oil filter first to allow the circuit to drain completely
• remove the oil filler cap and the dipstick
• remove the drain plug
•
allow the oil to drain by gravity for at least 10 minutes (DO NOT USE SUCTION METHODS)
• fit a new oil filter
• refit the drain plug with a new sealing washer
• fill the engine with quantity of oil recommended for the engine
• refit the oil filler cap and the dipstick
• run the engine at idle until the oil pressure warning lamp goes out
• wait 5 minutes
• check the oil level using the dipstick: the level should be as close as possible to, but not exceeding the maximum mark (1) so as to be between (1) and (3)