my 1990 560sel had a slow leak in the radiator, so i put some stop leak in now it runs hot did i clogg my thermostat? or really mess something up?

your radiator is probably ready for the trash pile.aluminum shrinks over time and temp cycles[usually 7-8yrs]quick easy job for great piece of mind.

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David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg

The stop leak probably finished it off for good. The passages in the radiator are very small and were probably partially clogged to start with. Adding stop leak probably closed them even more.

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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