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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2018 BMW 740i
Engine - Repair (G12)
2018 BMW 740iSECTION Engine - Repair (G12)
- 11 00 Engine
- Handling components after flood damage (all 7' series models 2016-2022)
- Motor oil consumption measurement (all 7' series models 2016-2022)
- Overview of consumables (applicable BMW parts catalogue) (all 7' series models 2016-2022)
- 11 00 039 Check compression of all cylinders (740i 2016-2022, 740i xDrive 2017-2022)
- 11 00 598 Remove and install the engine on the front axle (740i 2016-2022)
- 11 00 670 Securing engine in installation position (740i 2016-2022)
- 11 00 682 Checking all cylinders for loss of pressure (after vehicle diagnosis) (740i 2016-2022, 740i xDrive 2017-2022)
- Commissioning the oil circuit (740i 2016-2022, 740i xDrive 2017-2022, 740e xDrive PHEV 2017-2019, 745e xDrive PHEV 2020-2022)
- Engine identification (all 7' series models 2016-2022)
- 11 00 598 Remove and install the engine on the front axle (740i xDrive 2017-2022)
- 11 00 670 Securing engine in installation position (740i xDrive 2017-2022)
- 11 00 039 Check compression of all cylinders (740e xDrive PHEV 2017-2019)
- 11 00 050 Removing and installing engine (740e xDrive PHEV 2017-2019)
- 11 00 670 Securing engine in installation position (740e xDrive PHEV 2017-2019)
- 11 00 682 Checking all cylinders for loss of pressure (740e xDrive PHEV 2017-2019)
- 11 00 039 Check compression of all cylinders (745e xDrive PHEV 2020-2022)
- 11 00 598 Remove and install the engine on the front axle (745e xDrive PHEV 2020-2022)
- 11 00 670 Securing engine in installation position (745e xDrive PHEV 2020-2022)
- 11 00 682 Checking all cylinders for loss of pressure (after vehicle diagnosis) (745e xDrive PHEV 2020-2022)
- 11 00 010 Drain and top up motor oil (750i 2016-2019)
- Checking compression of all cylinders (N63 N74 S63) (750i 2016-2019, 750i xDrive 2016-2022, M760i xDrive 2017-2022)
- Commissioning of the oil circuit and cooling system bleeding (750i 2016-2019, 750i xDrive 2016-2022, M760i xDrive 2017-2022)
- 11 00 039 Check compression of all cylinders (750i xDrive 2016-2022)
- 11 00 091 Installing engine exchange (750i xDrive 2016-2022)
- Remove drive belt
- Removing the belt pulley on the torsional vibration damper
- Removing the belt tensioner
- Releasing left charge air line partially
- Partially releasing the right charge air line
- Remove the clean air pipe of cylinder bank 1
- Remove the clean air pipe of cylinder bank 2
- Removing the left and right turbocharger
- Remove the coolant expansion tank for the low-temperature coolant circuit (charge air cooler)
- Remove left charge air cooler
- Remove right charge air cooler
- Remove guide tube for oil dipstick
- Removing the alternator
- Removing front heat shield
- Removing both exhaust manifolds
- Remove lower heat shield
- Removing all ignition coils
- Removing fuel delivery line
- Remove the high-pressure rail on the left
- Remove left high pressure pump
- Remove right rail
- Remove right high-pressure pump
- Remove injectors
- Removing flywheel
- Remove bearing bracket
- Remove front axle differential
- Removing the left engine support bracket
- Remove right engine support bracket (all-wheel drive vehicle)
- Removing the left intake plenum
- Removing the right intake plenum
- Remounting the mounted parts of the engine
- Installing the left intake plenum
- Installing the right intake plenum
- Installing the left engine support bracket
- Installing engine support bracket right (all-wheel drive)
- Install bearing bracket
- Install front axle differential
- Replacing the radial shaft seal
- Installing the flywheel
- Preparing the injectors for installation
- Install injectors
- Install the left high pressure pump
- Installing right high pressure pump
- Install the high-pressure rail on the left
- Installing the right high-pressure rail
- Installing fuel delivery line
- Install all ignition coils
- Install lower heat shield
- Installing both exhaust manifolds
- Installing front heat shield
- Install alternator
- Installing the belt tensioner
- Installing the belt pulley on the torsional vibration damper
- Installing both turbochargers
- Install the coolant expansion tank for the low-temperature coolant circuit (charge air cooler)
- Installing the guide tube for the oil dipstick
- Installing the right-hand charge air cooler
- Installing the left-hand charge air cooler
- Installing the clean air pipe of cylinder bank 2
- Connecting the left charge air line to the turbocharger
- Installing clean air pipe of cylinder bank 1
- Connecting the right charge air line to the turbocharger
- Install drive belt
- Bleeding/running-in procedure after installation of an exchange engine
- 11 00 598 Remove and install the engine on the front axle (750i xDrive 2016-2022)
- 11 00 670 Securing engine in installation position (750i xDrive 2016-2022)
- 11 00 041 Checking compression of all cylinders with diagnosis system (M760i xDrive 2017-2022)
- 11 00 050 Removing and installing engine (M760i xDrive 2017-2022)
- 11 00 091 Installing engine exchange (M760i xDrive 2017-2022)
- 11 00 598 Remove and install the engine on the front axle (M760i xDrive 2017-2022)
- 11 00 670 Securing engine in installation position (M760i xDrive 2017-2022)
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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.