Carbon Buildup on Intake Valves for Audi, Volkswagen, BMW and Mini

How to remove carbon buildup on intake valves on a direct injection engine

Intake Valves Audi Volkswagen BMW

Carbon buildup on intake valves for Audi, Volkswagen, BMW and Mini

Carbon may be the building block of life, but it can wreak havoc on your engine.

Audi, Volkswagen, BMW and Mini engines utilize direct injection of fuel into the cylinder. Direct injection is where the fuel is sprayed at a very high pressure, directly into the cylinder through fuel injectors. The engine control module, or ECU, precisely controls all aspects of fuel injection, including the amount of fuel injected, timing, air to fuel ratio, how long the valves stay open and more. This process achieves better fuel economy and power because the combustion of fuel is more complete and the fuel burns more efficiently.

Air intake valves in all engines are exposed to air mixed with oil residue which can build up on top of the valves. Older, port style [...]

About Autohaus…

Gerald Drouillard is the owner, manager and car salesman. He founded Birmingham Autohaus in 1970, which was a Gulf gas station and VW repair, located on Woodward next to Hunter House in Birmingham, Michigan.

Jerry began his career/passion for German cars while in college. He worked as a mechanic while obtaining a Bachelors Degree in business. Over the years, he became a Bosch Certified Master Technician.

The business thrived from the beginning, as the word of Jerry’s integrity and knowledge spread. Later, the business moved to Maple and Adams, as a Union 76 gas station with German car repair service (and Avis car rental). Then in the 80’s the business moved again to Clawson on 14 mile, right next to the Burger King, as a parts store and German car repair. In 1984, the business moved to its current location.

A great deal of our customers have been around since the beginning and [...]

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