- Aug 1, 2017
Hey guys, so i wasnt to sure if this was normal or not, but everytime i start up my n54 135i (Bone stock atm), i get this lound raspy rattle in my exhaust. Only lasts for about a minuite or two until engine warms up, then its completely gone. To add more confusion to this all, if during the first warm up period i pump the breaks a few times I hear a rattle in the exhaust again. But again once the car is warm its completely gone. Anyone know why or whats going on? I drive it around and cool it down before shutting off and absolutely nothing!