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I was not clear in my earlier post. There are two types. One has copper tubes and the other has aluminum tubes. They both have aluminum fins. The ones with the copper tubes will not rot out as copper is less reactive than aluminum. It is the tubes that are the issue since the inner walls of the tube are where the chemical reactions are causing pin holes and leaks
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I got too many cars!! Insurance eats me alive. Dave
78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
91 420sel - 205k
91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
00 GMC Silverado 1 ton 30k
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