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On 17 Oct 2002, at 15:11, Martinez, Leon wrote: > I noticed that the exhaust valves on the unmodified VW Mexican > heads have very thick stems, way thicker than it's tip and > much thicker than the intake,s valve stem, is this what you are talking > about ? I THINK that beetles started getting exhaust valves with 9mm stems (8mm is the norm for us) at about the same time that they became fuel injected. i heard that this was to prevent the problem with the exhaust valve heads breaking off and destroying an engine. I really don't know the full story on this, but I'd like to learn more from someone who can tell us the history of this. - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/