antduggan2008

Hi i have a 2005 citroen c5 1.8 petrol with a coolant problem the header tank has no pressure in it after being driven and the water is only slightly warm also replaced thermostat, pipe from there to rad is hot but the one beneath isn't but the temperature gauge is reading normal (middle) and also have an issue where there is only slightly warm air coming through the vents unsure if this is linked, could the cooling system need bleeding if so how? can anyone help????