Overview - Crankcase Ventilation

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2017 Audi S5, 2016 Audi S5, 2016 Audi S4, 2015 Audi S5, and 2015 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Oil Check Valve And Oil Separator Overview

Courtesy of AUDI OF AMERICA, LLC

O-Ring
- Only with oil check valve -2-
- Replace
Oil Check Valve or Plug
- 20 Nm
- In newer versions, the oil check valve is replaced with a plug.
Seal
- Replace
Cover with Oil Separator
- With connection for crankcase ventilation
- Removing and installing. Refer to OIL SEPARATOR, REMOVING AND INSTALLING .
Bolt
- 9 Nm
O-Ring
- Replace
- Quantity 2
Connection
- For the crankcase ventilation
- Installed position. Refer to Fig 2
O-Ring
- Replace
- Quantity 2
Bolt
- 2.5 Nm
Bolt
- 2.5 Nm
Crankcase Ventilation Hose
- To the cylinder head covers
- Removing and installing. Refer to CRANKCASE VENTILATION HOSES, REMOVING AND INSTALLING .
O-Rings
- Replace
Hose for Crankcase Ventilation
- To the air guide pipe
Hose Clamp
Oil Check Valve or Plug
- 20 Nm
- In newer versions, the oil check valve is replaced with a plug.
O-Ring
- Only with oil check valve -15-
- Replace

Fig 2: Identifying Installation Of Crankcase Ventilation Connector

Courtesy of AUDI OF AMERICA, LLC

-- Install the crankcase ventilation connector -1- with new O-rings into the oil separator cover.

Installed position: the tab -2- must engage into the guide -arrow-.