So most of you will know the problems I have had with the radiator etc, the car is booked in with the garage tomorrow to be pressure tested and bled properly, in order to get it there I will be driving it, now here is the problem
As the car dumped the coolant last week I have had to use what little coolant I had left and the rest water to fill it up to get it to the garage.
So when I was bleeding the system tonight, because they was so little coolant in the system loads of steam was coming out if the bleed screw and eventually boiled over the top of the expansion tank.
I am worried that if I drive it to the garage tomorrow with mainly water in (3 miles away) the steam will build up a lot of pressure and do some real damage.
So to prevent this could I drive it with the bleed screw loosened to let the steam out? I know some coolant will come out but it won't let enough out to empty the system I don't think.
Would this be safe?