This is a big job, took us two days to complete and needed to purchase specialty tools like the super thin 12 point spark plug socket (thanks BMW). The first 30 minutes is actually getting to the timing chain and then I left a lot of footage in with the chain replacement. not for the faint of heart, do at your own risk.
![](https://i.ytimg.com/vi/uOG_zQey5JQ/maxresdefault.jpg)