N46 VVT Motor replacement

[Syl]

Hi guys

Long time no post!

I need to replace my 2006 E90 320i with the N46 engine's VVT motor, and since I cant seem to find a clear cut DIY on the web to do this I'm thinking of making one while I'm at it.

I've got everything thats needed, I've just got one question: After the VVT motor has been replaced, I understand it needs to be calibrated. Now I've read on a few places that all you need to do after installing is turning the car on and off (not starting it) a few times and the VVT will automatically adjust it's 'stops' by itself.

Is this correct? And does that mean I do not have to take it to BMW or use DIS to have it calibrated?

I've also read that you need to push the gas 10 times while on for it to calibrate. Which one is correct?

Thanks guys!:coolShake:

 

[Philip Foglar]

If it is anything like the N52 like my 330i, then yes, all you do is insert the key fob, ignition on (without starting), and you will actually hear it cycle the end stops. Only needs to do it once, then it's sorted. You can still then do a fine calibration through BMW tool or DIS, but on the N52 it's only the basic calibration that is needed apparently.

And trust me, you do not want to drive your car when this has not been done! I had mine replaced some years back, and it was not properly calibrated - they fitted the new part and tried to do the fine calibration without bothering to do the basic calibration. The car drove like cr@p all the way home, and if it wasn't for the fact that it was Friday late afternoon traffic, I would have turned back. The throttle was jerky, especially when lifting off! And at first I thought it was an adaptation thing, so gave it a few WOT up a hill - damn thing would not go past 6k rpm! That's when I knew something was wrong! Went home and remembered the basic calibration, tried it, and it worked! Drove fine after that, and didn't bother getting the fine calibration done.

But, maybe double check, might be somewhat different on this engine.

 

[Syl]

Hi guys

For future reference if someone might want to know. I can officially confirm after replacing my VVT motor this weekend that you just need to turn the car to the on position without starting and the VVT will adjust its end stops by itself.

Car is running perfectly!

Thanks for replying Phillip! I appreciate it.:coolShake: