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10854 Views 24 Replies 10 Participants Last post by  noobytoogy
Saturday night I took my wife's 2008 Touareg to work because she had just came home from errands and her vehcle was already warm. After an overnight shift I tried starting it and it would only half start and shook violently before quitting. I tried a few more times and same thing. It was cold this night here in northern Minnesota and got -13 degrees Farenheit. However, it has been outside in much colder temps and never had an issue. Long story short I had to get it towed and only to find out the exhaust was completely frozen up under the vehicle. According to my service department our era of Touareg does not have drain holes in the exhaust like the new generation Touareg and as a result it was just another one of the many problems we have had with this vehicle. The dealer ended up drilling some holes for us and even seemed in disbelief about the situation. And by the way it was not packed with snow underneath and I can assure you this vehicle is babied. This is the only vehicle I have ever had do this and I'm just annoyed at what has gone wrong on this thing considering the "premium" label. I told my wife the next issue and it is gone for an American SUV and we are done with VW.
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The process of combustion produces water and carbon dioxide whether it is a candle on the table or a rocket engine launching a space craft as well as those IC engines we love. Catalytic converters and all those other post processing of exhaust gases are to deal with the small fractions of the mix that didn't complete the reaction in the combustion chamber. The unburned hydrocarbons that are "converted" (combusted) form a little more water and CO2. In very general terms - sort of a hip pocket estimate - a gallon of fuel will produce about a gallon of liquid water. The heat of combustion usually keeps the water in the vapor state except in very cold environments where dripping tailpipes are common. This is the first I have ever heard of an exhaust system freezing up and I live in northern NY. I have seen weep holes in mufflers before but I do not know about my 2010 TDI.
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