OK, so how do I proceed with the tube? Can I clean it out or do I have to replace it and does that mean getting a whole slew of gaskets for the intake manifold, etc.
Also, is there a quick way to check the switchover valve that the EGR connects to with a multimeter?

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'02 BMW 325i
'85 300D 450k
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'08 Ducati Hypermotard 1100S 6k
'06 Ducati S2R800 14k(sold)