2014 AUDI S8 CGW/CGA (4H)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Timing chain tensioner noise
• Oil consumption in some early D4 V8 engines

First checks

• Check for timing chain rattle on cold start
• Inspect for oil leaks from valve cover gaskets

Antes de cambiar piezas

• Save fault codes and freeze-frame data before clearing anything.
• Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
• Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.

Important notes

• The 2014 S8 was sold globally with minor market differences in emissions and emissions equipment.
• Engine codes CGW and CGA refer to slightly different engine calibrations depending on market and emissions standards.