Vaccum Line's

[NZM50SWAP]

Motor is a 92 non vanos' m50.
Which vaccum hose's go to the little thing that bolt's to the side of the air box? What's this thing called? Can you bypass it?

[techno550]

the thing on the side of the airbox is probably the intake air thermostat for controlling coolant flow to the throttle body. Where do the lines go? one to the block and one to the TB?

[tonytony]

I dont think it would make a difference if you bypass it, i'd just keep it in there. My motor came with an aftermarket intake with the thermostat built it so i just kept it.

http://www.realoem.com/bmw/showparts...42&hg=11&fg=35

it's #11