If the brake fluid level is up past the max could it be caused by a blockage in the system?

Answer 1

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No. This will be due to pads being replaced and no fluid removed to compensate or air in the system somewhere.

Answer 2

i don't think so, if there was a blockage in the system there would be a noticeable difference when braking.

examples are-

pulls violently to one side
takes longer to stop or slow down

Brake fluid is whats known is "hydroscopic" this means that in naturally draws in and absorbs moisture from the atmosphere, depending on how old your brake fluid is it may have absorbed alot of moisture so the level has gone over the max mark.

i would take it to your local garage and ask for your brake fluid to be tested and if required, have it changed.

hope this helps.

Source(s):

10 years as motor technician

Answer 3

brake hydraulics are a closed system. As the pads wear, the wheel caliper piston moves down using more fluid from the master cylinder.

Normally as the brakes wear the fluid in the master cylinder goes down - not up.

I agree with ^. It's most likely that a dude has fitted new brake pads and pushed the fluid level up in the master cylinder.

Obviously it's not a leak

Answer 4

No...as many already mentioned, this happens when doing new brakes and pushing the calipers back to fit in new pads. It pushes fluid back into reservoir.

You really should never have to add brake fluid, if it's at proper fill level when brakes are new, then it can be a good indication as to when you need new brake pads.

But make sure it's not over full. When fluid heats up and expands it can actually build up pressure in master and actually start applying the brakes (very slightly). Suck out some fluid until you are at fill line.