Audi Workshop Service and Repair Manuals

Crankshaft - exploded view

When carrying out repairs, secure engine to assembly stand with engine and gearbox support -VAS 6095- → Chapter.

1 -

Bolt

q	For bearing cap

q

Renew

q	Tightening sequence → Fig.

2 -	Dowel sleeve

q	Insert in cylinder block

3 -	Drive chain sprocket for oil pump

q	Removing and installing → Chapter

4 -	Bearing cap

q	Note marking → Fig.

q	Removing → Fig.

q	Installing → Fig.

5 -

Nut

q	For bearing cap

q

Renew

q	Tightening sequence → Fig.

6 -	Thrust washer

q	Only fitted on 4th crankshaft bearing

q	Oil grooves face outwards

q	Note location

q	Measuring axial clearance of crankshaft → Chapter

7 -	Bearing shell

q	For bearing cap (without oil groove)

q	Do not interchange used bearing shells (mark positions)

q	Install new bearing shells for the bearing caps with the correct coloured markings → Fig.

8 -	Crankshaft

q	Measuring axial clearance → Chapter

q	Measuring radial clearance → Chapter

q	Do not rotate the crankshaft when checking the radial clearance

q	Crankshaft dimensions → Chapter

9 -	Thrust washer

q	Only fitted on 4th crankshaft bearing

q	Oil grooves face outwards

q	Measuring axial clearance of crankshaft → Chapter

10 -	Bearing shell

q	For cylinder block (with oil groove)

q	Do not interchange used bearing shells (mark positions)

q	Install new bearing shells for the bearing caps with the correct coloured markings → Fig.

11 -

Stud

12 -

Bolt

q	For bearing cap

q

Renew

q	Tightening sequence → Fig.

Markings on crankshaft bearing caps l  Bearing 1 is on pulley end.

Removing crankshaft bearing caps –  Remove bolts and nuts for crankshaft bearing caps. –  Pull crankshaft bearing caps off cylinder block using puller -T10055-.

Matching crankshaft bearing shells to bearings in cylinder block   Note The -arrow- points to pulley end. t  Bearing shells of the correct thickness are matched to the bearings in the cylinder block at the factory. Coloured dots on the bearing shells are used to identify the bearing shell thickness. t  The allocation of the bearing shells to the cylinder block is identified by a code letter next to the relevant bearing.

Letter on cylinder block		Colour coding of bearing
G	=	Yellow
B	=	Blue
S	=	Black

Matching crankshaft bearing shells to bearing caps t  Bearing shells of the correct thickness are assigned to the bearing caps at the factory. Coloured dots on the bearing shells are used to identify the bearing shell thickness. t  The correct allocation of bearing shells to crankshaft is indicated by a sequence of letters on the crankshaft web. The number “1”-arrow- preceding the sequence of letters indicates the colour code for No. 1 bearing.

Letter on crankshaft		Colour coding of bearing
G	=	Yellow
B	=	Blue
S	=	Black

Installing crankshaft bearing caps –  Renew bolts -A- and nuts -1 ... 8- –  Insert dowel sleeves into cylinder head. –  Then tighten bearing cap nuts/bolts to the final setting in the sequence illustrated: 1.  Screw in bolts -A- hand-tight. 2.  Tighten nuts -1 ... 8- to 35 Nm. 3.  Turn nuts -1 ... 8- 90° (1/4 turn) further using a fixed wrench. 4.  Tighten bolts -A- to 20 Nm. 5.  Turn bolts -A- 90° (1/4 turn) further using a fixed wrench.