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On 1 Dec 2001, at 15:52, Pamela Peeples wrote: > What would you say are the top reasons for getting exhaust inside the > car? There are no apparent holes in the underbody of the car, deck lid > over engine is sealed good, and rear door seal is in fairly decent > shape. Any ideas? > > On a similar but different matter; will old heater boxes get you exhaust > in the car when the heater is turned on? Do heater boxes go bad?? I suspect these are really just one question, because the most common way for exhaust to get in the car is with the heated air. This is not due to a heat exchanger failure in the normal sense, but rather due to a poor seal between the heat exchanger and the muffler. Exhaust gas leaks there will spray forward and blow into the heat exchanger airbox around the rusted away joint where the exhaust pipe exits the airbox. The cause of the leak is usually the result of the fact that the OD of the heat exchanger exhaust pipe has gotten smaller as it has rusted away, so that the muffler seals don't work well anymore. I've made some replacement pieces that can be welded onto the heat exchangers to fix this problem. - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/