Oil Check Valves and Spray Jet Valve, Overview Audi A4 B6

Note. If irregular valve noise occurs repeatedly during short journeys and disappears after extended driving, the oil check valves must be replaced.

Note. The following list refers to items in see scheme 436.

1. O-Rings Always replace
2. Oil check valve - 20 Nm for oil supply at left cylinder head
3. Banjo fitting - 15 Nm
4. Baffle
5. Gasket Always replace
6. Cover With connection for crankshaft housing ventilation Removing intake manifold, see «INTAKE MANIFOLD, REMOVING AND INSTALLING»(ref-197058-S00386977522005101100000)
7. 10 Nm
8. Hose to pressure regulation valve of crankshaft housing ventilation
9. Spray jet valve - 25 Nm for piston cooling
10. Oil line
11. O-ring Always replace
12. Oil check valve - 20 Nm for oil supply at right cylinder head
13. O-ring Always replace

Scheme 421

Scheme 422

1. VAG1342 oil pressure gauge
2. VAG1527B
3. VAG1594A