Originally Posted by RentonTDI
From your signature, I notice you have a 2009 E90 328i xDrive. Would you mind if I ask when your car was manufactured?
I ask because I am under the impression that all e90s maunfactured after 11/31/2008 should have the new head installed from factory, but you mention experiencing the ticking sound. It's possible you have an early build 2009 e90, and just missed the new head being installed, hence my question.
NOTE: This site lets you plugin the last 7 digits of your VIN, to determine your cars manufactured date:
This thread contains the SIB, that mentions the 11/31/2008 date:
My e90 was manufactured on June 2009. I have no idea what it could be. Warming it up longer seemed to be the solution for me