could air get into the brake lines after a clutch master cyliner was r

[stumpjumper]

dealer gave my car back today, and while hunting for a squeak they replaced the master cylinder, and well, on my 15 mile drive home the brakes felt worse than I remember

now, I've been out of the car a week so it could be that, but I'd just flushed the brakes with ATE super blue and remember the pedal being rock hard and easily being able to lock the brakes if I tried, but now the pedal feels softer and it seems to take longer to stop... my gut says there is air in the lines but before I go accusing them and demanding that it be fixed (or just doing it myself) I figured I'd ask if it's possible

I know the systems are integrated and use the same reservoir, but I don't have a diagram to see how the lines are run for the clutch

thanks ahead of time Loren

[RayGT3]

I would assume, it would be possible, but unlikely, to get air into the brake system, if in fact, they had at some point drained the reservoir dry. And then somehow messed with the brakes, like pressing the brake pedal with no fluid. I don't think the two systems share anything but the reservoir. But as you mention you are experiencing a change in brake performance after the work had been performed. I would certainly bring this to the dealers attention and at least give them an opportunity to comment or remedy this problem. It's no big deal for them to just bleed the system, if there might be any doubt. Then both parties feel safer.

[FrayAdjacent986]

It's feasible that air could have gotten into the brake system, since they share the same reservoir. If someone were to actuate the brake pedal in the shop while the fluid level was too low...

I'd tell the dealer that the brakes feel weakened, and have them bleed the brakes for you.

[stumpjumper]

thanks guys,

I bled them just in case and it seems OK

I'm wondering if it's because I dropped it off when it was 50 degrees and picked it up when it was 85 degrees... the tires are a little stickier now so they don't slide as easily... oh well, it seems fine