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.
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HOMESERVICE MANUALSBMW2011128I 2D CONVERTIBLE, N51, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE - REPAIR (N51)
2011 BMW 128i 2D Convertible, N51, Automatic
Engine - Repair (N51)
2011 BMW 128i 2D Convertible, N51, AutomaticSECTION Engine - Repair (N51)
- Engine General
- 00 Danger Of Poisoning If Oil Is Ingested/Absorbed Through The Skin
- 00 Risk Of Injury If Oil Comes Into Contact With Eyes And Skin
- 00 Safety Instructions For Handling Oil
- 11 00 Removing And Installing/Replacing Acoustic Cover (N51)
- 11 00 050 Removing And Installing Engine (N51)
- 11 00 670 Securing Engine In Installation Position
- 11 00 Service - Engine Oil (N51)
- Engine Identification
- Mounting Engine On Assembly Stand (N51)
- Cylinder Head And Cylinder Head Cover
- Oil Sump
- Housing Cover
- Crankshaft With Bearing
- Flywheel
- Vibration Damper
- Connecting Rod With Bearing
- Piston With Rings And Pin
- V-Ribbed Belt W/TENSIONER
- Camshaft
- 11 31 005 Checking Camshaft Timing
- 11 31 025 Removing And Installing/Replacing Inlet Camshaft (N51)
- 11 31 028 Removing And Installing/Replacing Exhaust Camshaft (N51)
- 11 31 051 Replacing Timing Chain (N51)
- 11 31 090 Installing And Removing/Replacing Chain Tensioner Piston (N51)
- 11 31 505 Adjusting Camshaft Timing (N51)
- Rocker Arm With Bearing Mount
- Valves With Springs
- Variable Camshaft Timing
- Variable Valve Gear
- Oil Supply
- Oil Pump With Filter And Drive
- Oil Filter And Lines
- Water Pump With Drive
- Thermostat And Connections
- Intake Manifold
- Exhaust Manifold
- Vacuum Pump
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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.