Overview - Crankcase Ventilation

Fig 1: Crankcase Ventilation Exploded View

Courtesy of AUDI OF AMERICA, LLC

1. Cylinder Head Cover
2. Seal
   • Always replace after removing
3. Hose
   • To the EVAP Canister Purge Regulator Valve 1 -N80-
4. Oil Separator
   • Removing and installing. Refer to OIL SEPARATOR, REMOVING AND INSTALLING .
5. Seal
   • Always replace after removing
6. Hose
   • For the crankcase ventilation
   • To the turbocharger
7. Bolt
   • 4 Nm
   • Thread cutting
   • Position the bolt by hand and tighten it until it finds the old threads. Then tighten the bolt to the specification.
8. Seal
   • Always replace after removing
9. Bolt
   • Tightening Specifications and Sequence 
     • Rest of World version. Refer to Fig 2.
     • China market version. Refer to Fig 3.
   • Thread cutting
   • Position the bolt by hand and tighten it until it finds the old threads. Then tighten the bolt to the specification.

Oil Separator - Tightening Specification and Sequence, Rest of World Version

Fig 2: Oil Separator - Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts to 9 Nm in the following sequence: -1 to 7-.

Oil Separator - Tightening Specification and Sequence, China Market Version

Fig 3: Oil Separator - Tightening Specification and Sequence (China Market Version)

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts to 9 Nm in the following sequence: -1 to 7-.