BMW E46 M54 Oil Pump Rebuild & Cleaning DIY #m54rebuild 15

I began my rebuild when I did a compression test and noticed I had poor compression in cylinders 2-6 (about 142 psi, the bottom of the service limit). Cylinder 1 head 160 psi. A leakdown test showed leakage into each adjacent cylinder. Of course my engine also had the oil consumption problem (1 quart every 1000 miles) that every M54 engine has, which is caused by the oil rings which wear down prematurely (the M52TU used different oil rings which did not have this problem). There was also coolant loss, which I didn't measure precisely. To see all the videos in the #m54rebuild series:    • M54 Engine Rebuild Project   To see all the rebuild specs for the M54/M52 series engines: https://www.dropbox.com/sh/g6fqtycr1l... I probably can't really call this a rebuild seeing as there is nothing to rebuild. Nothing for me, anyway. You just change 1 o-ring. This video is for entertainment purposes only. 50sKid assumes no liability for any repairs or modifications performed by the viewer as a result of the information contained in this video.