Audi Workshop Service and Repair Manuals

Notes:

• ◆ Replace the cylinder head bolts.
• ◆ When performing repairs, replace seals, gaskets, self-locking nuts and bolts which have a specified tightening angle.
• ◆ When installing an exchange cylinder head with fitted camshaft, the contact surfaces between tappets and cams must be oiled after installing the head.
• ◆ The plastic protectors fitted to protect the open valves must only be removed immediately before fitting the cylinder head.
• ◆ When fitting a new cylinder head or cylinder head gasket, drain off all the old coolant and re-fill with new coolant.
• ◆ Cylinder heads which have cracks between the valve seats or between valve seat inserts and the spark plug thread can be used further without reducing service life, provided the cracks do not exceed a maximum of 0.3 mm in width, or when no more than the first 4 turns of the spark plug threads are cracked.

Part 1

Note:

The cylinder head for vehicles with engine code APF is illustrated in the Fig.

• 15 Nm
• 20 Nm
• Toothed belt guard - rear
• Cylinder head
• ◆ Cylinder head => Pages 15-41
• ◆ Checking for distortion
  => Fig.15-9
• ◆ Reworking dimension
  => Fig.15-9
• ◆ Installing
• ◆ After replacing, fill with fresh coolant
• O-ring
• ◆ Replace

• 10 Nm
• Breather connection
• ◆ To coolant compensation tank
• ◆ Only for vehicles with engine code APF
• Oil deflector
• Cylinder head cover gasket
• ◆ Replace if damaged or leaking
• ◆ Before fitting gasket, apply sealant at sealing points => Fig.15-10
• ◆ Sealants

=> Parts List

• Reinforcement strips
• Cap

• Seal
• ◆ Replace if damaged or leaking
• Breather housing
• ◆ Turn clockwise to remove
• Seal
• ◆ Replace if damaged or leaking
• 10 Nm
• ◆ Tighten in stages and in diagonal sequence
• Bracket
• Cylinder head cover
• ◆ Removing and installing
  .
• Cylinder head bolt
• ◆ Replace
• ◆ Note sequence when loosening
• ◆ Note sequence when tightening => Page 15-51

• Sealing ring
• ◆ Replace
• Screw plug - 15 Nm
• Sealing ring
• ◆ Replace
• Coolant distributor housing/connection
• 10 Nm
• 20 Nm
• Lifting eye
• Cylinder head gasket
• ◆ Replace => Removing cylinder head, Page 15-35.
• ◆ Installation position: Part number points towards cylinder head, and must be legible from the inlet side
• ◆ After replacing, fill with fresh coolant

Part 2

• Fuel return pipe
• ◆ Mark before removing
• Fuel feed pipe
• ◆ Mark before removing
• Support
• ◆ For upper section of intake manifold
• 22 Nm
• 10 Nm
• Washer
• Rubber bush
• 10 Nm
• ◆ Not fitted on all versions
• Earth wire
• ◆ Not fitted on all versions

• Upper section of intake manifold
• ◆ Removing and installing for vehicles with engine codes AEH, AKL => Page 15-11
• ◆ Removing and installing for vehicles with engine code APF => Page 15-18
• Sealing ring
• ◆ Replace
• Pipe for exhaust gas recirculation
• ◆ Only for vehicles with engine code APF
• 10 Nm
• Seal
• ◆ Replace
• 10 Nm
• Throttle valve connection
• Clip
• ◆ Not fitted on all versions

• Sealing ring
• ◆ Replace
• ◆ Install with adhesive sealant
• ◆ Adhesive sealant

=> Parts List

• 3 Nm
• Lower section of intake manifold
• ◆ Removing and installing
• 20 Nm
• 20 Nm
• Sealing ring
• ◆ Replace
• Fuel rail
• ◆ With injectors
• 10 Nm
• O-ring
• ◆ For injectors
• ◆ Replace
• ◆ Coat with clean engine oil.

→ Fig.1    Checking cylinder head for distortion

• ‒ Use straightedge and feeler gauge to measure at several points.
• ‒ Max. permissible distortion: 0.1 mm

→ Fig.2    Reworking dimension for cylinder head

• ‒ Reworking the cylinder head (grinding) is only permitted down to minimum dimension a.
• ‒ Minimum dimension a = 132.60 mm

→ Fig. 3    Sealing points for bearing caps/cylinder head

• ‒ Apply a small quantity of sealant to joints -arrows- on upper sealing surface of cylinder head.
• ‒ Sealants

=> Parts List

→ Fig. 4    Sealing connections between camshaft adjuster and cylinder head

• ‒ Apply a small quantity of sealant to joints -arrows- on upper sealing surface of cylinder head.
• ‒ Sealants

=> Parts List