What causes a Valvetronic motor to fail?
Typical causes could include poor electrical connections, a damaged or defective actuator motor, low system voltages, or a binding/sticking eccentric shaft. The presence of this code will typically cause the Valvetronic system to be deactivated, and in some cases, a limp mode to be initiated.
What is valvetronic actuator?
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.
What does valvetronic motor do?
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.
What does BMW valvetronic motor do?
What is BMW Valvetronic motor?
What causes a Valvetronic eccentric shaft to fail?
The shaft over time and mileage wears in certain spots that cause the movement of the shaft to bind. This increased resistance is picked up by the computer monitoring the motor and a fault is thrown. The Valvetronic eccentric shaft needed to be replaced. Removing it requires the removal of the valve cover.
What causes Valvetronic oil filters to fail?
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 is an electric Valvetronic motor?
The electric valvetronic motor was first on normally-aspirated engines but is now common on the turbocharged vehicles as well. It is responsible for actuating an eccentric shaft that adjusts intake valve lift. The motor itself is pretty reliable and does not fail too often.
What happens when you repair a Valvetronic engine?
When ever we repair a Valvetronic engine, we replace the needle bearings (pictured), eccentric camshaft, a complete set of rockers, oil filter and oil change with the correctly specified engine oil (often over looked elsewhere). On severely affected engines, timing chains and intake camshafts may require replacement.