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 had 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: [ Ссылка ]
To see all the rebuild specs for the M54/M52 series engines: [ Ссылка ]
The 0.5mm oversized M52TU style oil rings can be found here: [ Ссылка ]
(Contact the seller for standard size oil rings)
Glyco Main Bearings: H023
BMW part number: 112117068476
The master 3.0 engine rebuilding kit I used (see seller's other items for 2.5 engine or pistons only):
[ Ссылка ]
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