Hey guys,new guy here.Used to work @ ford dealer when 6.0 was first coming out.Now working @International dealer.We don't see very many 6.0l as yet but last week one came in for a coolant leak in the valley area.One of the other techs was looking at it until the service manager pulled him off saying it was going to ford under warranty.He said he could definately see coolant in the valley but didn't know where it was coming from.Anyway the next day we get a call from the ford dealer telling us they cant find any leaks and we are getting billed for diag.The truck came back with no leaks and the valley completely dry.Unit was checked again and found not to be leaking.Any known or common leak points in this area?Any quick fixes that might have been done?Service manager says he is not paying because he knows something was done,leaks don't cure themselves.