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1984 MERCEDES-BENZ 300 TURBO DIESEL, 1978 CHEVROLET K20 CUSTOM DELUXE
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Discussion Starter #1
Hello i was testing some vacuum lines the other day and saw this plastic piece with an arrow that was facing backwards i think. I am not sure if someone put this on wrong in the past or if that is the way it is supposed to be.
 

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W-1-2-3 Go!
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That's fitted correctly. The air flow is indicated by the arrow, because it is indicating vacuum. Air goes away from the brake booster in order to assist in braking, and this air goes to the vacuum pump.
 
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