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> Bleeding Mast Cylinder in the car, Suggestions, Ideas, Don't do that's
hndyhrr
post Oct 21 2025, 06:40 PM
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Got the MC installed, all lines attached.

Watched Ian Karr's video.


Started to bleed, seeing old brake fluid and lots of bubbles, after about fifteen minutes of this I am not seeing a stream of fluid coming down the clear plastic tube. Yes the end is submerged in brake fluid. Checked for leaks at the MC and dry as a bone. Check inside car and dry also.

I have never done this before so just wondering and asking for suggestions, ideas and don't do that.

Thanks

Renee

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GeorgeKopf
post Oct 23 2025, 01:01 PM
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I just installed a completely new (and dry) brake system. I was struggling with getting the master cylinder to pull fluid from the reservoir so I took the bare end of my ShopVac hose (blowing air) and held it against the opening of the fluid reservoir and applied positive air pressure.

That did the trick and I was able to bleed the brakes after that.

Four obvious things:

1. I covered the entire fender and frunk area with towels in case it splashed.
2. Hold the hose tight against the reservoir opening and then turn on the ShopVac.
3. Make sure you switch the hose to blow air.
4. Leave the right rear bleeder screw open.

George
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