Thread: 335D the famous "no boost untill 3000rpm" problem
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      08-25-2018, 12:59 AM   #39
Yozh
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Drives: 2011 335d M-Sport
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Quote:
Originally Posted by VladPC View Post
Yozh...what type of "check valve" is located in the brake booster that fails to keep vacuum inside the system.

The only two parts that I'm aware are just gaskets (rubber gaskets).

One is this one ( 34311160617 ), it seals the master cylinder going inside the brake booster.

The second one ( 34336765316 ), is seals the vacuum pipe going inside the brake booster.

Am I missing something or am I mistaken?
Pipe 11 has a check valve in it:
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Name: Capture3.PNG Views: 9631 Size: 161.2 KB
Last edited by Yozh; 08-25-2018 at 01:06 AM..
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