Work sequence
WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, and 2003 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
- Start engine and run until coolant temperature reaches approx. 80 °C.
- Increase engine speed to about 2500 RPM for 2 minutes, if necessary perform test drive.
If hydraulic lifters are still noisy, locate faulty lifters as follows:
- Remove cylinder head cover → Cylinder head cover, removing and installing .
- Rotate crankshaft until lobes on cams of lifters to be checked are pointing upward:
Vehicles with manual transmission:
- Push vehicle forward with 4th gear engaged and ignition switched off.
Vehicles with automatic transmission:
- Remove sound insulation and turn crankshaft clockwise by applying wrench to central bolt on crankshaft sprocket.
- Measure play between cam and valve lifter.
- Use wooden or plastic wedge to push down valve lifter. Replace valve lifter if an 0.20 mm feeler gauge can be inserted between camshaft and valve lifter.
Replacing valve lifter → Camshafts and camshaft adjuster, removing and installing ; Camshafts and camshaft adjuster, removing and installing
NOTE:
- After installing camshafts, engine must not be started for approx. 30 minutes. Hydraulic valve compensation elements have to settle (otherwise valves will strike pistons).
- After working on valve gear, turn engine carefully at least 2 rotations to ensure that none of the valves make contact when starter is operated.