Main Bearing Color Codes

Crankshaft Main Bearing Color Codes

Important!
Aluminium screws/bolts must be replaced each time they are released.






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

Observe bearing classification.
Mechanical Specifications

Bearing classification (2) of connecting rods code letters b and r.






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

Installation Note:
When all the letters and number code have been determined, the bearing shell color must be allocated.

Installation Note:
The letter / number combination produces a bearing shell pairing.

Identification by different colors.

Important!
First bearing point is on the timing drive.
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.