What is Valvetronic engine technology?

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.

How do you calibrate Valvetronic?

Basically you reconnect everything, turn the car ON (don’t start engine), and wait. You should here the car going through the “self test/calibration” on the valvetronic motor. Wait about 30 seconds and turn the car off. Next restart everything should be ready.

How do I know if my Valvetronic motor is bad?

What can go wrong with Valvetronic systems?

1. Illuminated MIL lamp that may or may not be flashing.
2. Varying degrees of power loss.
3. Rough idling/running at some engine speeds.
4. Excessive fuel consumption.
5. A hard-start or a no-start condition may be present.

Is Valvetronic like VTEC?

Can Valvetronic use its variable lift to increase power like VTEC ? Sadly, Valvetronic is actually less efficient at high rev than conventional engines, let alone VTEC. As you can see, the camshaft drives the long intermediate rocker arms, in turn drive finger followers, this generates quite a lot of friction.

What are the symptoms of a bad valvetronic motor?

What can go wrong with Valvetronic systems?

• Illuminated MIL lamp that may or may not be flashing.
• Varying degrees of power loss.
• Rough idling/running at some engine speeds.
• Excessive fuel consumption.
• A hard-start or a no-start condition may be present.

How do I remove valvetronic?

The steps to remove:

1. turn the valvetronic motor clockwise till you feel resistance.
2. unbolt the valvetronic motor.
3. and as you pull it out turn the valvetronic motor counter clockwise.

How do you reset a valvetronic n46?

What causes valvetronic motor failure?

Common causes and symptoms: Wear and tear, as well as added mileage, can cause the valvetronic eccentric shaft to experience wear, causing the shaft to bind. In this case, the increased resistance in the shaft is what triggers the fault code.

What do you need to know about the Valvetronic system?

Before we dive into the video, here is a nutshell what the Valvetronic system is and how it works. Valvetronic is a variable valve timing system to offer continuous and precise control over variable intake valve lift, from 0.3 to 9.7 mm (0.18mm to 9.9mm, Valvetronic II and III), and duration.

What does the Valvetronic system on a BMW mean?

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.

How is a Valvetronic engine different from a butterfly engine?

Valvetronic-equipped engines rely on the amount of valve lift for load control, rather than a butterfly valve in the intake tract. In other words, in normal driving, the “gas pedal” controls the Valvetronic hardware rather than the throttle plate.

Where does the gas pedal control the Valvetronic system?

In other words, in normal driving, the “gas pedal” controls the Valvetronic hardware rather than the throttle plate. Cylinder heads with Valvetronic use an extra set of rocker arms, called intermediate arms (lift scaler), positioned between the valve stem and the camshaft.