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Now in 993 land ...
Join Date: Mar 2003
Location: L.A.-> SF Bay Area
Posts: 14,885
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The exhaust gasses are separate from the heat passages! You likely have oil drip on your heater ducts and it soaks through, leading to smoke coming out of your heater duct. There is no way you can leak oil into the actual heat exchanger (from the exhaust side or the outside world).
George
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97 993
81 SC (sold)
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