Valvetrain, component overview
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 Audi S4, 2008 Audi S4, 2007 Audi S4, 2006 Audi S4, and 2005 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.
1 - 5 Nm plus an additional 1 /4 turn (90 °)
- Replace
2 - Housing for camshaft adjustment solenoid valve
3 - Gasket
- Replace
4 - Valve stem seal
- Replacing → Valve stem seals, replacing .
5 - Valve spring
6 - Valve spring plate
7 - Valve keepers
8 - Hydraulic valve lifter
- Pressed into roller rocker lever
- Not removable without being damaged
9 - Roller rocker lever
- Removing and installing → Roller rocker lever, removing and installing
10 - Alignment bushing
- 2 pieces
11 - Double bearing cap
12 - 5 Nm plus an additional 1 /4 turn (90 °)
- Replace
13 - Oil deflector
- On cylinder head at right between bearing cap E4 and A4
- On cylinder head at left between bearing cap E2 and A2
14 - 5 Nm plus an additional 1 /4 turn (90 °)
- Replace
15 - Bearing cap
- Note installation position and allocation Installing
16 - Intake camshaft
- Removing and installing → Camshafts, removing and installing
- Checking axial play → Camshaft (axial clearance), checking
- Check radial clearance using Plastigage (roller rocker lever removed) wear limit 0.1 mm run-out max. 0.01 mm
17 - Exhaust camshaft
- Removing and installing → Camshafts, removing and installing
- Checking axial play → Camshaft (axial clearance), checking
- Check radial clearance using Plastigage (roller rocker lever removed) wear limit 0.1 mm run-out max. 0.01 mm
18 - Shaft for roller rocker lever, intake side
- Removing and installing → Roller rocker lever, removing and installing
19 - 10 Nm
20 - Shaft for roller rocker lever, exhaust side
- Removing and installing → Roller rocker lever, removing and installing
21 - O-ring for shaft of roller rocker lever
- Replace
22 - Cylinder head
- See note → Valvetrain, servicing
- Check valve guides, grind valve seats → Valve guides, checking
- Rework valve seats → Valve seats, refacing
23 - Intake valve
- Do not rework, only lapping is permitted
- Valve dimensions → Valve dimensions
- Check valve guides, grind valve seats → Valve guides, checking
24 - Exhaust valve
- Do not rework, only lapping is permitted
- Valve dimensions → Valve dimensions
- Check valve guides, grind valve seats → Valve guides, checking
25 - Alignment bushing
- 2 pieces