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GeraldR=> I just noticed there was like a grey smoke out => of my exhaust when I revved up my engine. Grey would be oil, most likely. How many miles on the engine? => I get a terrible exhaust smell coming out of my defrost => ducts. Its doens seem to be coming out of my heater holes If the system is tight and connected correctly, air goes only from the heater boxes and fan to the heat outlets, then to the defrost outlets, so there's nowhere for exhaust to get in *after* the heat outlets. Exhaust in the heat system isn't unusual, however, so I'd be inclined to recheck your data on the heat outlets. As a source, check for a loose or leaky connection at the joints between the large heat exchangers and the muffler, allowing exhaust to backflow into the tin exchanger case. Steven Ayres, Prescott AZ '66 Grosse Karmann ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/