I put the s54 hydraulic chain tensioner in mine:
https://www.fcpeuro.com/blog/how-to-...r-in-your-328i
Nice upgrade
I watch this guy to fall asleep sometimes. The b58 Gen 1 teardown video was very useful. I have an extra vanos spline socket tool I was going to mail him actually.
The m54 is doing pretty good now that it's warmer. The fuel trim / lean codes have been gone for almost two weeks without changing anything. I might be able to pass emissions testing. I still think something is wrong. I keep smoke testing it, nothing.
Every time I drive it I just want to get the supercharger going it really needs it.