They also confirmed oil leak and reported the following:
Vanos solanoid seals leaking Rocker shaft seal leaking Engine vacuum pump and sump gasket leaking PAS (coil pipe) leaking fluid Brake discs and pads worn (not too worried about this as it is normal)
With Valvetronic, the throttle-valve actuator is activated for the following functions: · Engine start (warm-up) · Idle speed control · Full load operation · Emergency operation
The lift range of the intake valves has been improved. The maximum lift has been increased to 9.9 mm but more importantly the minimum lift has been further reduced to 0.18 mm.
VANOS VANOS 1 VANOS 2 Range: _________________________________________________RETARD/ADVANCE Variable Cam Timing These parameters indicate whether the variable camshaft control (VANOS) system is commanding the camshaft(s) into retard or advance positions.
Control of the VANOS solenoids is an output function of the ECM. For dual VANOS (VANOS 1 & 2) there is one solenoid for each camshaft (intake and exhaust). For single VANOS, there is one solenoid controlling the intake camshaft. Control solenoids are installed on one side of the control piston.
2015/1/29(木) 午後 5:54
The engine control module regulates the solenoids through a pulse width modulated (PWM) signal to apply or drain control oil pressure from the VANOS pistons. Camshaft adjustment is based on several characteristic maps stored in the control module.
2015/1/29(木) 午後 5:54
The main control parameters for camshaft adjustment are derived from the engine speed signal and the throttle valve position signal. The VANOS system adjusts the camshaft timing for all engine operating conditions to optimize engine performance, reduce exhaust emissions, and improve fuel economy.
2015/1/29(木) 午後 5:55
The system increases torque at the lower to mid-range engine speeds without sacrificing upper speed range power. The VANOS system receives inputs from the engine speed, mass airflow (MAF), engine coolant temperature (ECT), and camshaft position (CMP) sensors. On some versions, VANOS may receive additional input from the engine oil temperature (EOT) sensor.
2015/1/29(木) 午後 5:56
On Single VANOS, only the intake camshaft is controlled. When the control solenoid is energized, the intake camshaft is advance. When the solenoid is de-energized, spring tension forces the intake camshaft back into the retarded position. On Dual VANOS, both the intake and exhaust camshafts are controlled.
2015/1/29(木) 午後 5:56
With VANOS solenoids energized, the intake camshaft is advanced and the exhaust camshaft is retarded. With the VANOS solenoids de-energized, the intake camshaft is retarded and the exhaust camshaft is advanced.
コメント（20）
27BB Exhaust Camshaft Control
2731 Inlet Camshaft Control
http://mechanicalee.blogspot.jp/2014/03/bmw-fault-codes-hex-code.html
2015/1/29(木) 午後 4:19
Valvetronic fault codes 2A6F and 2A70 plus engine and PAS oil leak ...
www.bimmerforums.co.uk/.../valvetronic-fault-codes-2a6f-2a70-plus-engine -pas-oil-leak-help-t175641/
2A6F - Valvetronic, minimum lift exceeded. 2A70 - Valvetronic, plausibility: sporadic current fluctuations ... BMW: E90 N46 Vacuum Pump leak DIY removal repair reinstate guide : BMW 3 series Forum ??€￠ BMWLand However ...
2015/1/29(木) 午後 4:21
2A6F - Valvetronic, minimum lift exceeded
2A70 - Valvetronic, plausibility: sporadic current fluctuations
They also confirmed oil leak and reported the following:
Vanos solanoid seals leaking
Rocker shaft seal leaking
Engine vacuum pump and sump gasket leaking
PAS (coil pipe) leaking fluid
Brake discs and pads worn (not too worried about this as it is normal)
http://www.bimmerforums.co.uk/forum/f125/valvetronic-fault-codes-2a6f-2a70-plus-engine-pas-oil-leak-help-t175641/
2015/1/29(木) 午後 4:27
With Valvetronic, the throttle-valve actuator is activated for the following functions:
· Engine start (warm-up)
· Idle speed control
· Full load operation
· Emergency operation
http://www.bmwclubmalaysia.com/forums/forum/bmw-tech-and-performance/engine-tech/48086-about-n46-engine-which-can-be-found-in-most-new-e46-or-e90-or-n87-etcs
2015/1/29(木) 午後 4:40
How to replace your coolant pipe, valve covers, timing gaskets and more
http://www.bimmerfest.com/forums/showthread.php?t=417251
2015/1/29(木) 午後 5:14
645Ci Valvetronic Intermediate Lever Spring Loose
http://www.bimmerfest.com/forums/showthread.php?t=685208
2015/1/29(木) 午後 5:26
BMW 3-Series (E90)
Debut: 2005
Maker: BMW
Predecessor: 3-Series E46
Bi-Vanos VVT, 3-stage variable intake manifolds, Valvetronic, and the world's first magnesium-aluminum crankcase.
http://www.autozine.org/Archive/BMW/old/3er_E90.html
2015/1/29(木) 午後 5:28
The lift range of the intake valves has been improved. The maximum lift has been
increased to 9.9 mm but more importantly the minimum lift has been further
reduced to 0.18 mm.
http://www.kneb.net/bmw/E90/04_N52%20Engine.pdf
2015/1/29(木) 午後 5:41
VANOS
VANOS 1
VANOS 2
Range: _________________________________________________RETARD/ADVANCE
Variable Cam Timing
These parameters indicate whether the variable camshaft control (VANOS) system is
commanding the camshaft(s) into retard or advance positions.
https://www1.snapon.com/Files/Diagnostics/UserManuals/BMWVehicleCommunicationSoftwareManual_EAZ0025B42B.pdf
2015/1/29(木) 午後 5:52
Control of the VANOS solenoids is an output function of the ECM. For dual VANOS (VANOS 1 &
2) there is one solenoid for each camshaft (intake and exhaust). For single VANOS, there is one
solenoid controlling the intake camshaft. Control solenoids are installed on one side of the
control piston.
2015/1/29(木) 午後 5:54
The engine control module regulates the solenoids through a pulse width
modulated (PWM) signal to apply or drain control oil pressure from the VANOS pistons.
Camshaft adjustment is based on several characteristic maps stored in the control module.
2015/1/29(木) 午後 5:54
The main control parameters for camshaft adjustment are derived from the engine speed signal
and the throttle valve position signal.
The VANOS system adjusts the camshaft timing for all engine operating conditions to optimize
engine performance, reduce exhaust emissions, and improve fuel economy.
2015/1/29(木) 午後 5:55
The system
increases torque at the lower to mid-range engine speeds without sacrificing upper speed range
power.
The VANOS system receives inputs from the engine speed, mass airflow (MAF), engine coolant
temperature (ECT), and camshaft position (CMP) sensors. On some versions, VANOS may
receive additional input from the engine oil temperature (EOT) sensor.
2015/1/29(木) 午後 5:56
On Single VANOS, only the intake camshaft is controlled. When the control solenoid is
energized, the intake camshaft is advance. When the solenoid is de-energized, spring tension
forces the intake camshaft back into the retarded position.
On Dual VANOS, both the intake and exhaust camshafts are controlled.
2015/1/29(木) 午後 5:56
With VANOS solenoids
energized, the intake camshaft is advanced and the exhaust camshaft is retarded. With the
VANOS solenoids de-energized, the intake camshaft is retarded and the exhaust camshaft is
advanced.
2015/1/29(木) 午後 5:57
N系は以下にはまだ含まれていない
https://www1.snapon.com/Files/Diagnostics/UserManuals/BMWVehicleCommunicationSoftwareManual_EAZ0025B42B.pdf
2015/1/29(木) 午後 6:18
http://askatech.com/AskATechLive/Dashboard/Dashboard.aspx?docType=Question&sourceName=EbiWiki&idfromSource=18551826&solutionId=18551826&changeSelection=true&latestControl=true&host=aer4872q9304520q734a??tDateTime=2015-01-08+17%3A43%3A28&hostKey=386AAB1C4492F04F32F20759AFE2F5E8&hostDateTime=2013-02-01+18%3A23%3A11
2015/1/29(木) 午後 9:12
tool
http://www.handyforce.com/upload/dnld/2012%20Handy%20Force%20Master%20Catalogue.pdf
2015/1/29(木) 午後 9:46
engine type
http://www.turnermotorsport.com/t-BMW-Engine-Codes.aspx
2015/1/29(木) 午後 10:01
VALVETRONIC-SHAFT
http://www.ebay.com/itm/BMW-N52B25-11377515868-VALVETRONIC-SHAFT-/151568825164?pt=Motors_Car_Truck_Parts_Accessories&hash=item234a34bb4c&vxp=mtr
2015/1/29(木) 午後 10:08