So my cars been screaming at me for coolant for the last month or so now and ive been topping up every 5 or 6 days. Filled the coolant up and went a 20 minute motorway drive to come back and find it was empty again. Theres no leaks, pressure test showed nothing at all but the water is still going somewhere! Coolant has started to change to a foggy brown colour over the last few days and my temp gauge is bone idle and wont move unless i'm on the motorway at this point all warnings go away.
As for white smoke i noticed some while reversing outside my home the other day and it wasnt terribly bad but it did catch my eye, There's no smell of oil in the coolant and no signs of the oil being gunky or white.
Cars in the garage just now and only showed up 1 fault "Coolant sensor fault" so they have sourced the new part and fitting as I type, But surely this wouldn't cause the coolant to rapidly dissapear?
Been online reading and faults could be as follows
Water pump ( I wasn't aware your supposed to change the water pump when changing the timing belt)
Radiator rusting in one of the corners.
Im leaning towards the head being cracked and absolutely dreading the phone call saying its going to cost a fortune!