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Jim Adney wrote: > This is all very normal. It's a combination of the dirt/oil that gets > thru the > >air cleaner, plus the EGR and the crankcase breather components. > > Ah, should I bother cleaning it then? I found it a little odd because I'm not used to seeing an oily throttle body, but then again, most of my experience is with more modern vehicles. If I do clean anything, just wipe up the excess? Or would using FI throttle body cleaner be too aggressive a move? It's a good thing this car's setup doesn't use a MAF sensor in the modern sense- I see on the modern VW discussion forums people freaking about about the relatively light amount of oil found on K & N filters and how overoiling will damage the corona wire on the MAF sensor. > I suspect this is common as well, although I haven't taken apart > enough EGR > >engines to tell. The EGR connection on my '73 is actually disabled, because the >filter rusted away, so I don't use that passage anyway. I suspect that a lot of >what you find there just comes from the same source as the crud above. > > > I'm wondering just how much my EGR is, uhm, EGRing anyway. The tube to the IAD had rusted off the flange at the EGR end, but there's no sign of hot exhaust burning anything in the vicinity (just a little bit of carbon dusted on the engine lid, not much else). I imagine if the filter is completely blocked (it's not perforated anywhere, however) then there isn't much the EGR is going to do. I'd consider eliminating the EGR system altogether if it weren't for the fact that the connection to the heat exchanger didn't look so inaccessable without pulling the engine. I guess I could put a blank flange at the filter connection until someday that the engine gets pulled. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~