Brake booster vacuum problem= all 4 brakes stucks

[babine810]

Soo my mechanic replace my leaking brake hose yesterday.now, when i press one time on the brake pedal, the compression work well. But after the 4 brakes is stuck like air come in but doesn't go out. When i disconnect the vaccuum hose from the brake booster . The brakes is now free and the brake pedal work well again? Did i have to replace the brake booster completely or i rebleed all ? Thanks

[dude8383]

Might need to adjust the clevis on the brake booster.

[ThatOneEuroE30]

Yea if this is a fresh swap its possible you didn’t get the clevis cut short enough and need to adjust it. What booster are you running? On my 944 booster i took off a decent amount and then re threaded it. No issues so far. Although my body guy did say it felt like my brakes were dragging but not sure i believe him cause i didn’t have any issues driving it to him.

[babine810]

I took from a renault like it said in e30zone and i did the little spacer in the master cyclinder. I think it parts of the problem.

http://www.e30zone.net/e30zonewiki/index.php/Engine_Swap_-_M5x#Servo

[babine810]

But i wondering why the brakes stuck?

[ThatOneEuroE30]

But i wondering why the brakes stuck?

If the clevis pin is not adjusted right. It will result in the brakes getting stuck.

[babine810]

Thank you! 🍻

[almostacrayon]

The spacer just has to take the space difference between boosters.
The length given on e30zone is just a rough estimate (what worked for that user).

Mine was only 10mm. That might be your issue?