Is it engine oil or tranny fluid? You did not say what vehicle this is, engine size or year, But if the tranny lines screw into the radiator, could be tranny fluid, if it's engine oil. It's either a bad head gasket, or cracked block. Do a cooling system pressure test, follw directions for detecting head gasket leak, If tranny cooler lines are going to the radiator, replace the radiator! The oil tank in the radiator is cracked.
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Sunday, October 7th, 2007 AT 9:50 AM