Allocation of main bearing shells for new crankshafts — AUDI
Allocation of main bearing shells for new crankshafts on Audi: factory workshop procedure for engines ASE, BAR, BAS, BAT.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
📋 Procedure
Allocation of main bearing shells for new crankshafts
Matching crankshaft bearing shells to bearings in cylinder block
Bearing shells of the correct thickness are matched to the bearings in the cylinder block at the factory. Coloured dots on the side of the bearing shells are used to identify the bearing shell thickness.
The allocation of the bearing shells to the cylinder block is indicated by letters on the front left of the cylinder block (legible from outside), as shown in illustration.
Letter on cylinder block
Colour coding of bearing
R
=
Red
G
=
Yellow
B
=
Blue
Note
The code letters are also stamped on the retaining frame.
Allocation of crankshaft bearing shells for retaining frame (crankshaft manufacturer: Alfing)
Bearing shells of the correct thickness are matched to the bearings in the retaining frame at the factory. Coloured dots on the side of the bearing shells are used to identify the bearing shell thickness.
The allocation of the bearing shells to the retaining frame is indicated by colour codings on the crankshaft webs, as shown in the illustration.
Crankshafts manufactured by Alfing do NOT have a manufacturer's code indicated on the crankshaft.
Coloured marking on crankshaft
Colour coding of bearing
Red
Red
Yellow
Yellow
Blue
Blue
Allocation of crankshaft bearing shells for retaining frame (crankshaft manufacturer: Weber)
Bearing shells of the correct thickness are matched to the bearings in the retaining frame at the factory. Coloured dots on the side of the bearing shells are used to identify the bearing shell thickness.
The allocation of the bearing shells on retaining frame is indicated by letters on the front crankshaft web, as shown in illustration. The
„X“
indicates the end of the row of letters and is next to the coloured marking for bearing 1 (pulley end).
Crankshafts manufactured by Weber have the manufacturer's code
A
on the front of the crank web.
Note
The row of letters begins on the left with bearing 5 (flywheel end).
Letter on crankshaft
Colour coding of bearing
R
=
Red
G
=
Yellow
B
=
Blue
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.