2004 E46 2.5Ci M Sport convertible
MF’er!!! So I did a 90 mile drive yesterday and everything was fine.You could do a simple test. Ride car for while turn on cabin heating.
If coolant level warning will lit, turn off cabin heating.
Confirm if coolant level warning will unlit.
If this problen occurs then your coolant level is not properly.
Maybe the system isn't bled fully, certainly the heater benefits from being used and the coolant system from being bled thoroughly and exactly as the manuals says it should be, and the level is maintained at the tank, but not in the system.I don’t get that though - the coolant level looks fine to me…
I would do as @BMW325TI says and it should bleed the system pretty well. Be prepared to do it again after a few drives .. It shouldn't need it, but mine did to get it completely bled.I’m still getting this so do I need to do a full coolant bleed or just top it up making sure the air screw gets fluid going through it as well?
So I tried this and there seemed to be quite a bit of air in the system so I topped it up until water came out of the bleed valve. Happy as I thought that must have been the problem.Raise your car at front.
Turn cabin heater to max tempetature and lowest fan speed.
Open bleed screw at top coolant hose.
Fill coolant into tank.
Squeeze top coolant for faster coolant flow.
If done well only fluid will come out of bleed screw.
So I tried this and there seemed to be quite a bit of air in the system so I topped it up until water came out of the bleed valve. Happy as I thought that must have been the problem.
Except…..whist doing this I dropped the bleed screw in the engine bay and can’t find the f***ing thing anywhere.
And naturally places like Euro car parts is closed on a Sunday.
So Ive called the AA out so see if they can get inside the bay and find it otherwise my car isn’t going anywhere for a few days.