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-   -   Stuck master cylinder (https://www.miataturbo.net/general-miata-chat-9/stuck-master-cylinder-109047/)

joe morreale 02-01-2024 09:18 AM

Stuck master cylinder
 
I wanted to change my brake master cylinder yesterday. After removing the 3 brake lines and 2 nuts, the damn thing wouldn't come out. It's not stuck to the booster. I can wiggle it. What can be holding it?

curly 02-01-2024 02:27 PM

The pedal pin.

joe morreale 02-02-2024 08:16 AM

I remember (I think) doing an NA and it just pulled out. Now removing the pedal pin is necessary for just the master and not the booster? I can't see where the pushrod would attach to the master. It appears to just fit in there. I'm stumped and I put the car back together. I want to understand what I'm doing before I try again. My stupid Haynes manual says just pull it out.

curly 02-02-2024 02:28 PM

Yeah I misread, if you’re not removing the booster, it should come right out. You’re most likely rusted to the push rod in the booster.

joe morreale 02-11-2024 11:40 AM

It's always pissed me off when an op doesn't come back and post if they solved a problem. So I'm back. The pushrod was corroded into the mc due to the mc leaking at the rear. I just loosened the nuts, till they were on by a few threads and hit the area with blaster. After about 5 minutes I just stomped on the brake pedal and it popped loose. It was just a matter of changing it normally after that.


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