►Audi S4 B8 and B8.5 3.0t engines feature a crankcase ventilation system, commonly referred to as the PCV, crankcase breather, or air/oil separator. If this is failing, you can experience numerous symptoms, and although they can show up at any time, most begin to show around 60,00080,000 miles. Some symptoms of a failing PCV system on your Audi B8 are more difficult to diagnose than others, with the most common being:

Vacuum Leaks
Illuminated Check Engine Light
Illuminated Oil Pressure Light
Rough Idle
High Oil Consumption
Lean & Misfire Codes
Idle Regulation Codes
Whistling Noise from Engine Cover
Oil Leak From Rear Main Seal

Although Audi doesn't consider the PCV system a regular maintenance system, it's well known that these parts fail regularly. The symptoms are easily diagnosed as other failures; however, the PCV system should always be checked early on in the diagnostic process as it's easy to replace/repair, and the parts are affordable.

Today Cory Calvin is here to show you how you can gain access to your Audi's PCV system and how to replace it, step by step.

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Shop Parts Used In This Video Here:

Audi Crankcase Vent Valve Genuine Audi 06E103547AB B8.5 S4 ONLY (20132016)
https://www.fcpeuro.com/products/vwt...

Audi Oil Separator Genuine Audi VW 06E103547AC
B8 S4 ONLY (20102012)
https://www.fcpeuro.com/products/audi...

Audi VW PCV Valve Hose Genuine Audi VW 06E103213
https://www.fcpeuro.com/products/audi...

Audi VW Intake Manifold Gasket Elring 079129717D (6)
https://www.fcpeuro.com/products/vwi...

Audi VW Coolant/Antifreeze Genuine VW GA137741GDSP
https://www.fcpeuro.com/products/audi...

Audi Supercharger Bleeder Screw Kit 034Motorsport 034145Z043
https://www.fcpeuro.com/products/audi...

Aluminum Skid Plate https://www.fcpeuro.com/products/audi...

Fits These Cars:
Audi A7 Quattro
20132015 Audi A7 Quattro
To 10/6/2014

Audi S4
20132016 Audi S4

Audi S5
20132017 Audi S5

Audi SQ5
20142017 Audi SQ5

00:00 The Parts You Need for this Job
01:28 What Tools You Need to Replace Your PCV System On A B8.5 S4
02:04 How To Remove The Air Intake On A B8.5 S4
02:45 How To Remove Supercharger On A B8.5 S4
09:29 How To Remove Fuel Lines On A B8.5 S4
09:55 How To Remove Intake Manifold Flaps On A B8.5 S4
16:23 How To Remove PCV On A B8.5 S4
17:16 What To Swap Over From Old PCV
19:00 How To Install New PCV On A B8.5 S4
22:20 How To Reinstall Fuel Lines On A B8.5 S4
23:26 How To Reinstall Intake Manifold Flaps On A B8.5 S4
28:16 How To Install Intake Manifold Gaskets
28:47 How To Install The Supercharger On A B8.5 S4
30:06 How To Fill & Bleed The Cooling System On A B8.5 S4
32:52 How To Reinstall The Supercharger Belt On A B8.5 S4
33:45 How To Reinstall The Air Intake On A B8.5 S4
34:12 Test Start
34:40 How To Reinstall The Under Tray On A B8.5 S4
34:57 Conclusion

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