Question on vacuum canister

kisarci

Lurker
Aug 27, 2017
24
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Ride
'07 e92 335i
Hello all,

I searched all over different forums and could not find an answer to my stupid question.

I deleted my vacuum canisters when I had my hot side inlets installed but as a preventive maintenance for my brake booster, I want to install the canisters back on.
I purchased the VTT billet vacuum canisters but was wondering which end of the canister connects to the boost solenoid.
Is there any kind of check valve or ball inside or does it not matter which end of the canister I plug the vacuum line to?

I appreciate any and all advice, thanks in advance.
 

ps2n54

New Member
Nov 4, 2024
6
0
0
no check valves - but its best practice to connect the top side to boost solenoid. less chance of condensation/debree/oil getting into solenoid.
 

ps2n54

New Member
Nov 4, 2024
6
0
0
my bad - you're totally right; doesn't matter - the vacuum travel is opposite to what i had in my head last night.