Oil Check Valve Replacement Audi A6 C5

Note. If irregular valve noise occurs repeatedly after short trips of driving and disappears after long periods of driving, the oil check valve must be replaced.

Scheme 98

1. Gain access to oil check valves, remove intake manifold. See «INTAKE MANIFOLD»(ref-147486-S22112343502002091600000).
2. Remove cover under intake manifold. Locate check valves and replace them. see scheme 113
3. To install, reverse removal procedure. Tighten cover bolts to 10 N.m (89 INCH lbs.). Install intake manifold. Tighten all bolts to specification. See «TORQUE SPECIFICATIONS»(ref-147486-S30794586192002091600000).