![]() This means the motor essentially operates two cams (accomplishing the same thing early hot-rodders did by changing out a camshaft). ![]() Introduced in 1992, VANOS was BMW’s foray into variable valve timing, a technology that allows the car to dynamically change the timing of the intake or exhaust valves based on RPM. Keep reading to learn about six common VANOS problems on BMW engines. ![]() While VANOS improves many aspects of engine performance, the added complexity of the system means there are more opportunities for things to go wrong. ![]() BMW’s variable valve timing system, called VANOS, had been used in BMW models ranging from luxury commuters to high-performance M models since the early 1990s. Variable valve timing systems benefit performance but have a significant impact on fuel efficiency and overall driveability. Many modern vehicles employ technologies that accomplish the same effect as changing cams, all without having to touch the engine. Variable valve timing (VVT) is the automakers’ solution to this. The problem is, the general consumer missed out on these benefits, as switching cams was beyond the ability of the average car owner. Switching out the cams in these cars became a popular way to make your car a torquey car with low-end power built for acceleration and street driving, or a high-end focused horsepower-pushing car made for racing. They had the choice of an aggressive cam profile for power or a more normal profile for fuel economy and reliability. If you have any questions, simply come by and visit Austin German auto repair experts at German Auto Center and we will be happy to assist you.In the early days of engine tuning, hobbyists and racers would switch the camshafts in their motors to gain power. Seek regular Porsche, Mercedes Benz, BMW, Volkswagen and Audi service in Austin, which will ensure that your engine management system is operating properly. Remember to service your engine and have the oil professional changed by the experts at German Auto Center every 7,500 miles (5,000 for turbo charged and super charged engines). Whether you drive a Porsche, Mercedes Benz, BMW, Volkswagen or Audi, remember that today’s German performance vehicles can only perform to their optimum specifications if they are properly maintained and serviced. By choosing German Auto Center, you can rest assured that our automotive team is knowledgeable in variable valve timing and VANOS. When seeking Austin BMW repair or service, it’s important that the automotive experts you choose understand the VANOS system. On the BMW VANOS system, this is also commonly followed by a “rattle” noise at the front of the engine. Oil and dirt deposits will become lodged in the timing control actuators causing check engine lights and poor operating performance. It is critical that you maintain the specified engine oil and change your oil regularly. Current technology utilizes a double VANOS system controlling both the intake and exhaust valves.Īlthough all manufacturers utilize variable valve and camshaft timing technology to gain better and more efficient performance, it does come with a price. ![]() In 1999, BMW first introduced the single VANOS system controlling the intake valves. from German variable Nockenwellensteuerung) system for controlling both intake and exhaust camshaft timing. One of the most complex systems currently supported is BMW’s VANOS (abbr. Earlier implementations of variable valve timing controlled just the intake camshaft(s) position, while current systems control both the intake and exhaust camshaft position, controlling when air enters the combustion chamber and when exhaust is let out independently. Today’s advanced systems use continuously variable cam controls – typically an oil solenoid valve is controlled from the ECU/DME and the position of the cam is detected and adjusted using the cam position sensors and actuators. The particular implementation varies with engine and manufacturer. This optimization automatically and continuously adjusts the valve timing to suit operating conditions (rpm/load), and can either increase fuel efficiency or engine performance depending on how the vehicle ECU/DME is programmed. Your BMW, Mercedes Benz, Audi, Porsche or Volkswagen has programming built into the engine control module (ECU/DME) that changes the engine valve timing (when the valves open and close) based on driving conditions. This allows a vehicle engine to be tuned and balanced between engine performance and engine economy (fuel mileage). Most current German make automobile engines including BMW, Mercedes Benz, Audi, Porsche and Volkswagen all make use of variable valve timing. ![]()
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