Originally Posted by
onehundred80
It is not a closed system, the lines are open at the reservoir. So any excess fluid due to expansion would return to the reservoir.
The lines are open so that the system can make up any losses of fluid, only when the master cylinder pistons move and seal the openings in the reservoir can it be called a closed system. One piston actually moves before the other in our system and many others because of a spring between them.
Sir, you are correct. Maybe the better feel was just due to the actual bleeding process getting all the air out! It sounded good in theory but in fact as usual you don't miss a trick. Glad you're on here.