Audi TT (2007 year). Manual - part 39

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not 
 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability 
     with respect to the correctness of information in this document. Copyright by AUDI AG.

Caution

Thrust washer can slip out of position behind idler gear.

♦ Before positioning balance shaft assembly, slacken off

bolt for idler gear as specified below, but not further. In‐

stallation position of thrust washer 

⇒ page 138

– Slacken bolt -1- for idler gear by approx. 45°.
– If not already fitted, fit dowel sleeves into cylinder block for

centring balance shaft assembly.

– Install balance shaft assembly on cylinder block. If the idler

gear is only partially coated it must be installed in the correct

position:

• White dot -arrow- on idler gear must be aligned centrally with

crankshaft.

• Idler gears not marked with a white dot can be installed in any

position.

• Take care not to damage the coating of the idler gear.

Note

Due to the gear ratio, the white dot -arrow- will not return to its

original position after the crankshaft has been rotated.

– Tighten bolts securing balance shaft assembly 

⇒ page 139

 .

1. Oil pump, sump, balance shaft assembly    

147

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not 
 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability 
     with respect to the correctness of information in this document. Copyright by AUDI AG.

– Lock balance shaft with locking tool -T10255- , turning balance

shaft as required.

• The lug of the locking tool must engage in the groove of the

balance shaft -arrow-.

– Carefully fit balance shaft gear onto balance shaft; to do so,

push idler gear slightly to one side.

• Take care not to damage the coating of the idler gear.
• The threaded holes in the balance shaft should be aligned as

centrally as possible with the elongated holes in the balance

shaft gear.

Note

If it is not possible to align the elongated holes in the balance shaft

gear with the threaded holes, you must turn the gear some teeth

further as required and then fit it again.

– Tighten bolts -arrows- for balance shaft gear.
– Remove locking tool -T10255- .

148

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not 
 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability 
     with respect to the correctness of information in this document. Copyright by AUDI AG.

Note

The following three steps have to be performed simultaneously

(a second mechanic is therefore required):

– Push idler gear -3- firmly in direction of -arrow- into teeth on

drive gear -2- and balance shaft gear -1-. If necessary use a

suitable wooden tool.

– At the same time, turn balance shaft gear slightly anti-clock‐

wise.

– Tighten bolt securing idler gear.
– Remove crankshaft stop -T10050- .

Note

After installation the idler gear must have no backlash. This can

be checked by exerting light pressure by hand.

Remaining installation steps are carried out in reverse sequence;

note the following:
– Install sump 

⇒ page 139

 .

– Top up engine oil and check oil level ⇒ Maintenance ; Booklet 

810 .

– Install vibration damper 

⇒ page 49

 .

1.7

Re-installing a used balance shaft as‐

sembly

Procedure

Note

♦

If re-installing the "old" balance shaft assembly and neither the

drive gear on the crankshaft nor the crankshaft itself have

been renewed, proceed as described in the following. It is also

essential that the idler gear has NOT been slackened.

♦

If the bolt for the idler gear has been slackened or the drive

gear on the crankshaft or the crankshaft itself have been re‐

newed, you must install a new idler gear with the appropriate

coating. Procedure for installation

⇒ “1.6 Installing a new balance shaft assembly”, page 146

 .

♦

Renew bolts securing balance shaft assembly.

1. Oil pump, sump, balance shaft assembly    

149

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not 
 permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability 
     with respect to the correctness of information in this document. Copyright by AUDI AG.

– Lock balance shaft with locking tool -T10255- , turning balance

shaft as required.

• The lug of the locking tool must engage in the groove of the

balance shaft -arrow-.

– If not already fitted, fit dowel sleeves into cylinder block for

centring balance shaft assembly.

– Attach balance shaft assembly to cylinder block.
• With the balance shaft locked in position, the idler gear must

engage in the drive gear on the crankshaft.

• Idler gear must have noticeable backlash.

– Tighten bolts securing balance shaft assembly 

⇒ page 139

 .

– Remove crankshaft stop -T10050- .
Remaining installation steps are carried out in reverse sequence;

note the following:
– Install sump 

⇒ page 139

 .

– Top up engine oil and check oil level ⇒ Maintenance ; Booklet 

810 .

– Install vibration damper 

⇒ page 49

 .

150