Audi Workshop Service and Repair Manuals

Crankshaft - exploded view of components

t	The illustration shows the “engine generation III” version as an example for both engine generations.

t	Secure engine to engine and gearbox support -VAS 6095- prior to performing assembly work → Chapter.

1 -	Dowel sleeve

q	Insert in cylinder block

2 -	Chain sprocket

q	“Engine generation III” only

q	Removing and installing → Chapter

3 -	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

4 -	Bearing cap bolts

q

Renew

q	Tightening sequence → Fig.

5 -	Bearing cap

q	Note marking → Fig.

q	Installing → 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 for bearing cap

q	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 -	Bearing bush

q	Automatic gearbox only

q	Driving in → Fig.

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 for cylinder block

q	With oil groove

q	Do not interchange used bearing shells (mark positions)

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

11 -	Bearing cap bolts

q	Tightening sequence → Fig.

Markings on crankshaft bearing caps t  Bearing -1- is on pulley end. t  Bearing -4- is on flywheel end

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 bearing shell are used to identify 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

Allocation of crankshaft bearing shells for bearing caps t  Bearing shells of the correct thickness are assigned to the bearing caps at the factory. Coloured dots on bearing shell are used to identify bearing shell thickness. t  The correct allocation of bearing shells to crankshaft is indicated by a sequence of letters on the crankshaft flank. 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 -1 … 8-. –  Insert dowel sleeves in cylinder block. –  Tighten bearing cap bolts in following sequence: 1.  Screw in bolts -A- finger-tight. 2.  Tighten bolts -1 ... 8- to 60 Nm with torque wrench. 3.  Turn bolts -1 ... 8- 90° further (1/4 turn) using a rigid wrench. 4.  Tighten bolts -A- to 25 Nm with torque wrench.

Bearing bush for torque converter   Note Short engines and reconditioned (exchange) engines, as well as new and reconditioned crankshafts, are supplied without bush -arrow-. The bush must therefore be knocked in before fitting drive plate on vehicles with automatic gearbox. This bush must not be fitted in vehicles with manual gearbox.