System Specifications

11 11 Engine Block, Cylinder Crankcase N52K/B30





a) new status or recondition

11 21 Bearing Journal Ground Sizes N52K/B30





11 21 Crankshaft Grinding Stages N52K/B30





11 11 1AZ Bedplate to crankcase hexagon screws N52K/B30
(14 x) M10 X 100 Replace screws
Jointing torque 20 Nm
Torque angle 70°

11 11 2AZ Bedplate to crankcase ASA screws N52K/B30
(25 x) M10 X 27 Replace screws
Jointing torque 15 Nm
Torque angle 90°

11 11 3AZ Bedplate to crankcase ASA screws N52K/B30
(4 x) M8 X 37 Replace screws
Jointing torque 8 Nm
Torque angle 90°

11 11 4AZ Bedplate to crankcase ASA screws N52K/B30
(2 x) M10 X 41 Replace screws
Jointing torque 15 Nm
Torque angle 90°

11 21 531 - Main crankshaft bearing shells (N52K)
Allocation of bearing points:

Bearing point 1 is at the front on the timing chain drive in the direction of travel.





Surface (1) for identification on crankshaft web 1.

Seven-digit part number (2).

Main bearing classification (3) for crankcase lower half (bedplate), code numbers 1 2 3, see table.

Code letters (4 and 5) are exclusively required for a machined crankshaft.

Code letter (4) as per table, main bearing.

B= build date 1 (B 1 2 3 -0.25 mm).

B= build date 2 (C 1 2 3 -0.50 mm).

Code letter (5) as per table, lift bearing.

B= construction stage 1 (-0.25mm).

C = construction stage 2 (-0.50 mm)





Main bearing classification (1) in crankcase, code letters A / B or C, see table.

The letter / number combination produces a bearing shell pairing.

Identification by different colors.

First bearing point is on the timing drive.

The color combination Yellow and Red must not be fitted.





Code letters on crankcase

Code letter A = bearing shell (1) color Yellow.

Code letter B = bearing shell (1) color Green.

Code letter C = bearing shell (1) color Red.

Code numbers on crankshaft

Code number 1 = bearing shell (2) Yellow.

Code number 2 = bearing shell (2) Green.

Code number 3 = bearing shell (2) Red.

The color combination Yellow and Red must not be fitted; the bearing colors Green / Green must be selected for this color combination, see table.





Installation example

For bearing 1 with code letter A on the crankcase and code number 1 on the crankshaft bearing shell (1) with the color Yellow is required for the crankcase and bearing shell (2) with the color Yellow for the crankcase lower half (bedplate).

Bearing 2: - A and 2 colors Yellow and Green.
Bearing 3: - B and 2 colors Green and Green.
Bearing 4: - C and 2 colors Red and Green.
Bearing 5: - B and 1 colors Green and Yellow.
Bearing 6: - C and 3 colors Red and Red.
Bearing 7: - C and 1 colors Green and Green.

The color combination Yellow and Red must not be fitted.

11 24 Connecting Rods and Bearings N52K/B30





11 21 Conrod Journal Ground Sizes N52K/B30





11 24 1AZ Connecting Rod Bolts N52K/B30
M8 x 47
Replace screw
Screw washed and oiled
Jointing torque 20 Nm
Torque angle 120°

11 25 Pistons with Rings and Pins N52K/B30








11 21 1AZ Hub of vibration damper to crankshaft N52K/B30
M16 x 80 Replace screw
Screw and thread are lightly oiled
Jointing torque 100 Nm
Torque angle 360°

11 23 1AZ Vibration Damper Bolts N52K/B30
M8 X 16 35 Nm