Audi B8/8.5 3.0t Engine Diagnostic & Maintenance Guide (Audi A6, A7, A8, S4, S5, Q5, Q7, & SQ5)

►The Audi B8 & B8.5 with the 3.0t engine offers one of the best buys on the market right now. However, with the oldest of these cars roughly 12 years old at this point, the engines will inherently need some maintenance.

In this video, Nathan Brown, one of our resident VW/Audi/Porsche experts, guides you through a full diagnosis of the 3.0t engine found in everything from the Audi A6 to the S4 and even the Q5. Covered are various leaks from the water pump, thermostat, and valve cover gasket, as well as failures of the ignition system, PCV system, secondary air injection system, and engine mounts. Beyond that, Nathan touches on the timing chain and timing chain tensioner issues that these engines are known to experience.

If you want to learn more about the Audi B8/B8.5 S4 and S5 other than just the engine, our Buyer's Guide covers what you need to know whether you have just begun your shopping for one, or if you're already a new owner.    • Audi B8/8.5 S4 & S5 Buyer's Guide - M...  

And if you'd like to learn more about the suspension in-depth, we have a diagnostic/maintenance video on that as well.    • Audi B8/8.5 Suspension Diagnostic & M...  

Buy Parts Mentioned In This Video - All Parts Linked fit a 2013 S4 - Add your car to "My Garage" to ensure fitment.

Audi Cooling System Kit: https://www.fcpeuro.com/products/audi...

Audi Ignition Tune-Up Kit: https://www.fcpeuro.com/products/audi...

Audi Valve Cover Gasket Kit: https://www.fcpeuro.com/products/audi...

Audi Timing Chain Tensioner Kit: https://www.fcpeuro.com/products/audi...

Audi Crank Case Vent Valve (PCV): https://www.fcpeuro.com/products/vw-t...

Audi VW Secondary Air Injection Pump Check Valve: https://www.fcpeuro.com/products/vw-a...

Audi Engine Mount (Right): https://www.fcpeuro.com/products/audi...

Audi Engine Mount (Left): https://www.fcpeuro.com/products/audi...

Index:
00:00 - Intro
00:42 - Engine Specs
01:45 - Coolant Leaks; Waterpump and Thermostat Failures
06:26 - Ignition System Failures
08:53 - Valve Cover Gaskets
10:01 - Timing Chain Tensioners
12:30 - Crank Case Vent Valve (PCV) Failures
14:30 - Secondary Air Injection System
15:15 - Engine Mount Failures
16:18 - Final Thoughts and Conclusion

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