problem w/ swap/ booster...

[new guy]

318is became a ALum M52B28 ---- start the car and the brake pedal drops and locks the wheels... turn car off then the car rolls just fine. Removed the booster vac line then the brake pedal doesn't move....(by itself) Curious to know why a booster could allow the pedal to be sucked in...

Also have the 750 master 25mm if it makes a difference....

thanks guys...

[SpecM]

-Do you have a check valve? W/o one I an see how it might do that

[Mike B.]

Check valve

[new guy]

I have a new one from the dealer in it... You think could be bad???

[FredK]

Maybe the check valve is installed backwards? Probably not, but it's worth a shot!

[new guy]

Arrow points towards engine... maybe bad???

[Mike B.]

I would remove it and test it to see if it's bad.

[matt]

The arrow should point toward the motor.

[DEV0 E30]

Maybe the check valve is installed backwards? Probably not, but it's worth a shot!

I did that after pulling my engine once.

Took a good amount of bleeding after my stupid mistake.

[new guy]

I have it in arrow towards engine... And just swapped a good one off another car... still problem. Bad Booster?

Maybe adjustment wrong on the push rod... I don't know just suggesting.