The eccentric shaft is an essential part of the fully variable valve lift control. The valve lift changes continuously from maximum to almost zero by rotating / pivoting the eccentric (shaft) by means of an electric motor.
What does BMW eccentric shaft sensor do?
The eccentric shaft sensor is responsible for controlling valvetronic timing, and has been known to be a common issue. If your car has been experiencing difficult starts, low fuel economy, and overall lack of engine power and performance, this component may be to blame.
What does a eccentric shaft actuator do?
The eccentric shaft position sensor is used as a feedback for the Valvetronic eccentric camshaft. The eccentric shaft is actuated by the Valvetronic motor and in return controls variable intake valve lift.
What causes valvetronic motor failure?
Poor servicing or after market oil filters are often the route cause of valvetronic failure. As you can see from the picture above, the after market oil filter on the right hand side has started to collapse.
What are the symptoms of a bad valvetronic?
Common symptoms that you will notice in this case include engine light is on, your BMW won’t start, runs rough, or an engine misfire.
How do you relearn a BMW valvetronic motor?
Insert the valvetronic motor and connect its 2 pin plug. Then switch the ignition onto position 2 and within a space of 15 seconds, depress the accelerator pedal down to full throttle 10 times and you will hear the valvetronic motor program itself back to factory spec.
Can you drive without Valvetronic?
You shouldve just unplugged valvetronic instead of trying to actuate it via software… when the dme sees valvetronic not working right it disables it with the valves at maximum lift. the car continues to drive fine with disabled valvetronic.
What is the difference between eccentric shaft and crankshaft?
A crankshaft is simply the same as an eccentric, except the eccentric is a much smaller diameter than the shaft itself Crankshaft length mainly depends on the number of cylinders are present in the engine . Firing orders also considered while designing the Crankshaft.
Can Valvetronic cause misfire?
The main question – can the problems with Valvetronic be the cause of such (misfires/shivering) problem? Short answer – within the limits of reason: no, Valvetronic is not the cause of this problem!
What is BMW Valvetronic system?
The Valvetronic system is a BMW variable valve lift system which, in combination with variable valve timing, allows infinite adjustment of the intake valve timing and duration. The system claims to improve fuel economy and emissions, and negates the need for a throttle body in regular use.
Will valvetronic harm my car?
It will not damage anything. By disconnecting the eccentric shaft sensor, the DME will put the valvetronic into emergency running mode. The valves will go to full lift via the DME activating the valvetronic motor and the accelerator will work off the throttle body.
Can you drive with a bad valvetronic motor?
If valvetronic fails, your electric throttle body takes over. Your engine is currently operating as a regular engine with a throttle. It is safe to drive to the mechanic. The most common problem is the eccentric shaft sensor.
What is BMW vanos?
BMW’s VANOS stands for Variable Nockenwellen Steuerung. The VANOS is incorporated in the BMW M50 engines, where they focus on controlling the cam gear, which has a mechanical link to the exhaust gear by a chain.
Does the N55 have valvetronic?
Design. The main differences between the N55 and its N54 predecessor are the use of a single turbocharger, the addition of Valvetronic and the type of fuel injectors.
What is an eccentric bearing used for?
Eccentric: Provides a collar with an eccentric lip that mates with an eccentric lip on the bearing inner ring. Turning the collar while holding the shaft and inner ring results in a “cam” action that locks the collar and inner ring to the shaft. (Eccentric lock is not recommended for reversing rotation applications.)
What is an eccentric crank?
The eccentric crank, also known as the eccentric pedal arm, allows you to make a smaller knee movement/bend compared to the unaffected side. An eccentric crank is usually made especially for you. The size depends on the knee bend/hip movement that is possible.
What does eccentric drive mean?
eccentric-and-rod mechanism, arrangement of mechanical parts used to obtain a reciprocating straight-line motion from a rotating shaft; it serves the same purpose as a slider-crank mechanism and is particularly useful when the required stroke of the reciprocating motion is small in comparison with the dimensions of the …
How do you read a BMW code?
- Standalone diagnostic device. Using a standalone diagnostic device to read out the error memory is easy and fast.
- Laptop with software and OBD cables. You can also read a BMW’s error memory with a laptop.
- Your smartphone and an OBD2 adapter.
Where is Valvetronic located?
Located in Pennsylvania, our team is obsessed with sound. From our marketing department to all of our highly trained engineers, we all have one goal of developing, manufacturing, and delivering the worlds greatest exhaust systems.
What is Valvetronic exhaust?
Valvetronic Technology Fi EXHAUST. The valvetronic technology allows an exhaust system to control the gas flow, sound frequency, and overall performance. This allows the sports car to have higher torque at low RPMs and even higher horsepower at higher RPMs.
Does a blowing exhaust affect performance?
Does Leaking Exhaust Affect Performance? It is true that if your exhaust pipe has a hole or a leak, your engine performance will be affected. For those driving older vehicles, the problem may not be immediately evident because older cars tend to be slightly noisier and less efficient.
Does exhaust affect carpower?
If you have a problem with your exhaust, it will begin to affect the performance of your engine. You won’t be able to accelerate as well or as quickly, and you won’t get the same power when you do accelerate. This problem will continue to worsen if you do not address the exhaust leak.
Why does exhaust affect performance?
Reduced Power The easier exhaust gases can escape into the outside atmosphere, the more power your car will have. Restrictions within the exhaust create back pressure, reducing the efficiency of the exhaust system as a whole.
What happens if VANOS fails?
If the VANOS system fails, your BMW will be unable to properly regulate its fuel usage. As such, it may start to burn through more fuel than normal. Simultaneously, your vehicle may also sputter and accelerate sluggishly, as its engine will struggle to push out the increased amounts of fuel through the exhaust cam.
How much do VANOS cost?
On average, it costs about $600 to replace a Vanos solenoid. The costs are split between $200 for parts and $400 for labor. The typical range is between $300 to $800. Different BMW engines use different Vanos systems, which may cost more than others.