Main Bearing Color Codes

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)

Observe bearing classification

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

When all the letters and number code have been determined, the bearing shell color must be allocated, see table.

The letter / number combination produces a bearing shell pairing.

Identification by different colors.

Important!
First bearing point is on the timing drive.

Important!
The color combination Yellow and Red must not be fitted.

Engine damage will result if excessively small bearing play is determined.

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

Important!
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.

Installation Note:
Possible color combinations for mounting the crankshaft in the crankcase