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Hello and welcome, today I'll show you how to expand and seal the vacuum pump. I do that on an N42 engine, but it works just as well on a N46 engine, have fun !!
Why should you do that?
Quite simply, the O-rings are hard after years and thus it is leaking and the oil drips then on the bifurcation, that you usually always notice when such a smell in the interior, which smells of burnt oil.