New everything sensor pump thermostat radiator upper and lower hoses and rear pipe block pipe isn't leaking it seams to be fine for a day then leaks so I'm guessing rear pipe is not seated bought new from dealer going to look at the one I put on to see if seated I have three 318s so I'll probably get this one exchanged for factory through FCP Euro just worried don't want to do any head damage from overheating thanks for the help really helpfull forum | 
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