Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSBMW2008128I 2D COUPE, N51, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE - REPAIR (N51)VARIABLE VALVE GEAR11 37 020 REMOVING AND INSTALLING/REPLACING POSITIONING MOTOR FOR ECCENTRIC SHAFT (N51)
2008 BMW 128i 2D Coupe, N51, Standard
11 37 020 Removing And Installing/Replacing Positioning Motor For Eccentric Shaft (N51)
2008 BMW 128i 2D Coupe, N51, StandardSECTION 11 37 020 Removing And Installing/Replacing Positioning Motor For Eccentric Shaft (N51)
IMPORTANT:
Aluminum-magnesium materials. No
steel screws/bolts may be used due to the threat of electrochemical corrosion. A magnesium crankcase requires aluminum screws/bolts exclusively. Aluminum screws/bolts must be replaced each time they are released
. Aluminum screws/bolts are permitted with and without color coding (blue). For reliable identification: Aluminum screws/bolts are not magnetic
. Jointing torque and angle of rotation must be observed without fail (risk of damage)
.
Necessary preliminary tasks:
- Remove acoustic cover.
- Unfasten ignition wiring harness and lay to one side.
- Remove the two rod-type ignition coils next to electric motor.
IMPORTANT:
The screw connection must not be released before the servodrive is in the service position.
Risk of damage to intermediate shaft.
Risk of damage to intermediate shaft.
Turn ratchet (1) with Allen key (2) clockwise in direction of arrow and relieve tension on intermediate shaft.
NOTE:
Do not turn shaft (2) too far.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.