Preface: I'm aware that there is already a DIY for this. I'm creating this DIY to help other owners like me (who are only familiar with basic maintenance tasks). I want to state the procedure, some issues I encountered along the way and my alternative solutions to them. Beware: Do this at your own risk, I do not hold any liability against accidents or damage made to your vehicle, physical injury or death to you or anyone else performing these tasks. Take caution and when you need assistance, seek help from a professional.
Problem: Leaking N52 Oil Filter Housing Gasket
Solution: Replacing Gasket 11427537293 (# retrieved from realoem)
Abstract:
1.Remove Engine Cover with T45 bit , oil pressure switch
2.Remove oil filter housing cap, oil filter, oil, and clean
3.Remove (3) 8mm bolts mounting Oil Filter Housing
4.Remove old gasket and clean contact surfaces
5.Install new gasket
6.Reinstall engine cover, 3 bolts on housing, oil filter, oil filter cap. Check for
leaks!
Tools Used:
T45 Torx bit
8mm bit + 3/8 rachet
3/8 flexible 6" extension
8mm box end wrench
Oil Filter Cap Wrench
Metal Pick
Nitrile Gloves for hand and to cover housing ports
Aluminum to cover alternator
Suggested time: 1-2 hours + account time for coolant change and venting. Actual time: 4 hours [I was cleaning and taking pictures for this DIY too] Level of expertise: Iʼm a Beginner
Cost: +- $20 for gasket + Coolant change additional +-$20
Special Notes: This DIY eliminates the step of removing the intake manifold to get to the hard to reach bolt.
*It is recommended to drain, fill, & vent Engine Coolant for this procedure.
Coolant Change Courtesy of e90post member Entity
http://www.e90post.com/forums/ showthread.php?t=248187
Download the PDF attachment to view the Step-by-Step DIY. Pictures are included.