Support elements with hydraulic adjustment, checking
WARNING: This page is about a different car, the 2008 Audi RS 4 and 2007 Audi RS 4. However, it is still accessible from the selected car via links, so may be relevant.
Special tools, testers and auxiliary items required
- Feeler gauge
NOTE:
- The support elements with hydraulic adjustment cannot be serviced.
- Irregular valve noises are normal while starting the engine.
Work procedure
- Start engine and allow it to run until coolant fan has switched on once.
- Increase engine speed for about 2 minutes to approx. 2500 RPM, perform road test if necessary.
NOTE:
- If irregular valve noises disappear but reappear during short drives, oil check valve should be replaced. Oil check valve location → Oil check valve and spray nozzle valve, component overview .
If support elements with hydraulic adjustment are still loud, locate faulty support element as follows:
- Remove cylinder head cover: Left → Left cylinder head cover, removing and installing , right → Right cylinder head cover, removing and installing .
- Rotate crankshaft until cam lobes on support element that will be checked face upward. To do this, move vehicle forward with 4th gear engaged and ignition switched off.
- Check play between cam lobes and roller rocker lever.
- Press roller rocker lever down with screwdriver - arrow -.
If a 0.20 mm feeler gauge can be inserted between camshaft and roller rocker lever:
- Replace support element → Camshafts, removing and installing .