Cylinder block — crankshaft (Audi A4 B8)

Crankshaft

1. Crankshaft.
2. Guide bushing: 2 pcs.; insert into the cylinder block.
3. Camshaft frame.
4. Bolt: replace.
5. Crankshaft axial locking liner: only on main bearing 3; mounting position: lubrication grooves facing outward; monitor the fixation.
6. Crankshaft support frame bearing insert; replace old bearing shells; install new crankshaft frame bearing shells with the correct color markings.
7. Not installed.
8. Dowel pin: check for secure fit in the crankshaft.
9. Crankshaft axial locking liner: only on main bearing 3; mounting position: lubrication grooves facing outward; monitor the fixation.
10. Bearing insert: for cylinder block with oil groove; replace old bearing shells; install new bearing shells with the correct color markings.

Crankshaft frame - last and bolt tightening torque

Replace the crankshaft bearing frame bolts. Install both mounting bushings into the cylinder block. Tighten the bolts in sequence. "1...16" in 3 stages as follows.

1. Tighten to 30 Nm. 2. Tighten to 50 Nm. 3. Tighten further by 90°.

Accessories for main bearing shells installed in the cylinder block

At the factory, bearing liners of the correct thickness are installed in the cylinder block. Colored dots on the bearing shell are used to mark the thickness of the bearing shells.

"Arrow". Belt pulley side.

The belonging of the bearing shells to the cylinder block is indicated by a letter next to the corresponding bearing.

Letter on the cylinder block	Bearing color
R =	red
G =	yellow
B =	blue

Matching the crankshaft bearing shells to the crankshaft frame

At the factory, bearing shells of the correct thickness are installed in the bearing caps. Colored dots on the bearing shell are used to mark the thickness of the bearing shells. The correspondence of the bearing shells to the crankshaft is marked on the edge of the crankshaft with a letter sequence. The first insert "1" "Arrow" is marked with color for bearing 1.