Brake servo failure?

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ZsZ
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Brake servo failure?

Post by ZsZ »

I went back to stock from a BMW brake servo as that was too light pedal feel and the
Now it is too hard :)

I got the BMW one for about a month or two in (~2000kms) so I think I still remember how it was before. And it was lighter

I washed the inside of the booster with brake cleaner and replaced the disintegrated foam on the shaft.

Did I ruin the booster with the wash? Was the foam too dense ans sealing the air outlet?

I measured vacuum, the vacuum pump makes around -25 inHg at idle. The booster holds vacuum with a slight but constant drop 1 inHg/min

Checked one of my buddies van, and his pedal is defo lighter. Just as I remembered mine.

Noticed two things:
On mine if I press the pedal quick, it is softer than if I press slowly. His seemed to work the same.
And my pedal sits lower than his.
Zoltan
1986 Multivan ex-Caravelle. Van since 2006, running mTDi 1Z since 2008 with Fiat Croma 1.9 TDid pump 2008-2019, custom pump since 2019
5spd custom box 4.57 diff + 0.74 5th

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