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N42 thermal vacuum routing


shift00

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I've got all the vacuum lines routed solely on reading and research. However, there is one vacuum line thats not very talked about or even easy to see in pictures. So, if i could get a little conformation on this set up, that would be great. The thermal vacuum that sit underneath the air regulator, looks to have two lines coming out of it. One that splits on the heater hose neck and the other that I presume runs into the thermostat neck. Is this the correct routing? Also, why is it there and what does it do? I see no reason to have it on my car, other than the fact that some how it pulls a vacuum from the throttle body. If someone can explain the "thermal vacuum that would be GREAT! Thanks for you time, Joe.

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