How do I reset my BMW Valvetronic motor?
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Then, what is the valvetronic on BMW?
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.
Also, what is an eccentric shaft BMW? 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. The eccentric shaft sensor is mounted to the cylinder head beneath the valve cover.
Likewise, how much does it cost to replace eccentric sensor?
Eccentric shaft sensors is not the same as a cam sensor. The ESS is about $250-$450 depending on whether you get OEM or not. There are 3 gaskets that should be replaced and it's about $50-$70ish for them. It's about 3 hours of labor to replace the valve cover gasket, valvetronic motor gasket, and ESS gasket.
What is a BMW vanos problems?
Symptoms of a Bad BMW VANOS SystemLoss of power and torque, primarily in the lower ranges, typically below 3k RPMS. Engine hesitation and bogging in the lower rpm ranges. Rough idle with frequent hiccups. Increased fuel consumption or poor fuel economy. Cold start issues and stalling in cold weather.
I have posted on various threads me experience of the time I had the valvetronic motor replaced by an indy (only reason for letting them do it was due to me not having the BMW tool to perform the fine calibration). Problem was, they fitted the new valvetronic motor but instead of performing the basic end stop sweep, they tried to do the fine calibration immediately. When I collected the car it drove really badly, was very rough, not so much in terms of idle or running, but accelerating/decelerating it was really bad, and then it would not go much over 6000 rpm when trying to go through the gears. It was only after I remembered the basic calibration that I decided to see if it would do that when I put the key fob in and turned the ignition on, and it did, just the one time though which I gather is all that is needed. After that the car was fine again, and never ended up getting the fine calibration done, so not even sure if that is really necessary, probably. I am just amazed that the indy did not pick up that something was clearly wrong when they took the car for a test drive after finishing the job!
BMW Valvetronic eccentric shaft failure
02 Jan BMW Valvetronic eccentric shaft failure
BMW Valvetronic eccentric shaft failure can happen suddenly. You go out to your vehicle unlock the doors, and before you even start the vehicle, you notice a terrible clicking/ binding noise coming from the engine bay. You start the car and there feels to be a slightly rough idle, but other than that, all is ok. Shortly after, you get a light on you dash. A service engine soon or check engine (CEL) appears on the dash. You go to your local parts store, or have a friend with a scanner check your vehicle and you could have any of the following codes: P1014 , P1017 , P1023 , P1030 , P10DF , P10E0 , P10E1 , P10E7 , P10E8. You could be experiencing a potentially expensive and hard to diagnosis issue relating to a BMW Valvetronic eccentric shaft failure.
The Valvetronic system on your bmw is a variable valve lift setup which, in combination with variable valve timing, allows the intake valve timing to be infinitely adjustable. 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. It’s basically a camshaft on top of the intake camshaft that controls how far open the valves move during one rotation of the intake camshaft. This means a BMW with valvetronic effectively negates the need for a throttle body, increases efficiency by minimising pumping losses and improves fuel economy and emissions.
This customer’s 135i with the N55 had it’s check engine light come on. Faults were for the valvetronic motor and valvetronic not reaching its limit. We performed the test plan which runs the valvetronic through its operating range and relearns the position. However, when the engine was started it would fail again and fault with one of the following BMW fault codes: 2DBA , 2DBB , 2DBC , 2DCA , 2DCB , 2DCE , 2DCF , 2D42 , 2D43 , 2D44
After a little more testing we finally made the conclusion that the valvetronic eccentric shaft had gone bad. 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. Special BMW tooling is required to release tension from the shaft springs and levers. Even with the tool, it is very easy for a spring to jump off and be in a position that can potentially cause catastrophic engine failure. After the repairs are performed on the Valvetronic assembly, the limit stops have to be relearned using the BMW scan tool to do this procedure. The limit stops are the mechanical limit stop, end to end of rotation of the eccentric shaft. The DME (digital motor electronics) records these stops via the eccentric shaft sensor to determine mechanical adjustment limits of the eccentric shaft. This is why the faults occur, the end stops are not correctly sensed when doing the precheck, or in this case, extra resistance from the shaft made the time to reach the limits longer than spec. Whit the new shafts in place, the vehicle was back to smooth fault-free running.
Do you suspect your BMW Valvetronic eccentric shaft failure issues? Don’t hesitate to get your car checked by the experts at Fluid MotorUnion. We have the equipment, experience and the desire to fix your vehicle right the first time. Email [email protected] with any questions, or drop us a call at our Naperville location by calling 630 305 3054.
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328i 2007 valvetronic motor bmw
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