3 Series E46 325i (M54) TOUR
Measure piston installation clearance:
Measure piston diameter with micrometer at distance A from the
underside of the piston and at offset angle of 90
°
to piston pin
axis.
Measurement A .
Adjust micrometer to cylinder bore of engine block, set internal
caliper on micrometer to zero. Measure bottom, center and top of
cylinder bore in direction of travel and direction of engine rotation.
Diameter of cylinder bore.
Piston installation clearance.
Total permissible wear tolerance.
Replace conrod bearing shells.
Important!
Piston and piston pin are paired and must not be fitted
individually.
Fit conrod with piston pin to piston in such a way that both of the
visible pair numbers on the installation direction arrow on the
piston point to the right.
Install snap ring so that opening is opposite recess.
RA Removing and installing or replacing all pistons (M52 / S52 / M52TU / M54 / M56)
BMW AG - TIS
13.02.2013 23:13
Issue status (12/2007) Valid only until next DVD is issued
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