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I think they meant iron valve seats, not iron heads. Kenik Hassel 71 fastback (back from hiatus) On Tue, 23 Sep 1997, Toby Erkson wrote: > Peter and others, > I read in the newsgroup (rec.autos.makers.vw.aircooled) that very early VWs > used iron heads. Here's a direct quote from the FAQs from the NG: > > > 5.) Do I need to use a lead additive/lead substitute in my VW? > > Volkswagen stated that all of their heads from about 1966 on have been > made with hardened valves, seats, and valve guides. Therefore lead > additive/substitute is not needed. If your heads have been rebuilt, > then the machinist probably used the good stuff. Silicon-bronze valve > guides are the good ones if that helps. > > > Should stainless-steel valves be used? Hmm, I don't know. I've *heard* > that they are 'softer' and will require more valve adjustments but I will > neither confirm or deny this. My guess would be to stay stock or talk with > a couple of professional engine builders, preferably the ones who build > race engines as they tend to know more about the various components and > materials. > Toby Erkson, air_cooled_nut@pobox.com > '72 VW Squareback 1.6L bored and stroked to 2.0L > '75 Porsche 914 1.8L > Portland, Oregon, http://www.geocities.com/MotorCity/8501/ >