Main Bearing Shells, Used And Reworked Crankshafts, Allocating

WARNING: This page is about a different car, the 2018 Audi S6, 2017 Audi S6, and 2016 Audi S6. However, it is still accessible from the selected car via links, so may be relevant.

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Bearing shells are allocated to cylinder block corresponding to color markings stamped into cylinder block.
With used and reworked crankshafts, the crankshaft pivot pins must be measured to allocate the appropriate bearing shells.
Crankshaft dimensions. Refer to CRANKSHAFT DIMENSIONS .
Thicker over-sized bearing shells are available for a reworked crankshaft. These have the same color markings as the original-size bearing shells.

Letter on Cylinder Block		Color of Bearing
R	=	Red
S	=	Black
G	=	Yellow
U	=	Green
B	=	Blue

Allocation Of Crankshaft Bearing Shells For Guide Frame

With used and reworked crankshafts, the crankshaft pivot pins must be measured to allocate the appropriate bearing shells.
Any other markings on the crankshaft are invalid when reworking a crankshaft.
Allocate bearing shells to the diameter of the main crankshaft pivot pins using the following table

Crankshaft with Crankshaft Bearing Journal Diameter 65 mm

Crankshaft Bearing Journal Diameter	Color Identification of Bearing Shells for Guide Frame
Dimensions in mm	Red	Black	Yellow	Green	Blue
Basic dimension 65.000	64.978 to 64.975	64.974 to 64.971	64.970 to 64.967	64.966 to 64.963	64.962 to 64.958
Repair stage 64.750 ¹⁾	64.728 to 64.725	64.724 to 64.721	64.720 to 64.717	64.716 to 64.713	64.712 to 64.708
¹⁾ The same color marking applies to the thicker over-sized bearing for reworked crankshafts as for a new crankshaft despite the greater bearing thickness.

Crankshaft With Crankshaft-Pivot Pin 67 Mm Diameter

Crankshaft Bearing Journal Diameter	Color Identification of Bearing Shells for Guide Frame
Dimensions in mm	Red	Black	Yellow	Green	Blue
Basic dimension 65.000	66.990 to 66.87	66.986 to 66.983	66.982 to 66.979	66.978 to 66.975	66.974 to 66.971
Repair stage 64.750 ¹⁾	66.740 to 66.737	66.736 to 66.733	66.732 to 66.729	66.728 to 66.725	66.724 to 66.721
¹⁾ The same color marking applies to the thicker over-sized bearing for reworked crankshafts as for a new crankshaft despite the greater bearing thickness.