2009 335I ticking noise from drivers side engine compartment at idle
I have noticed a ticking sound that is louder than normal coming from the drivers side of engine compartment. This sound is something like what others have described as lifters, but I have read that the N54 engine typ does not have this issue, so I took it to the stealer for service to look at it. Withing a few min. the tech found the problem. On the Drivers side, towards the very back of the engine compartment there is an emissions purge valve that takes the fumes from the gas tank and sends them into the intake. This purge valve's opening and closing is the source of the sound. It is alot louder than the tech has ever heard before and so they are putting a new one in under the warranty.
Just wanted to pass this info on to anyone who may also have this noise. The tech said that it would more than likely be just fine, but due to the loud sound, he will for fear that it may be going bad.