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.
2021 BMW X7 M50iFACTORY OEM SERVICE PROCEDURE
Variable Valve Timing Control System - Repair (G07) (3 Of 4)
- 11 36 Variable Valve Timing Control System (VANOS)
- 11 36 114 Removing and installing/replacing left exhaust camshaft adjuster (X7 M50i 2020-2022)
- Remove the sealing cap on the cylinder head of the cylinder bank 2
- Moving the crankshaft to the installation position to adjust the timings
- Check the VANOS adjuster of cylinder bank 2
- Relaxing chain tensioner on bank 2 for checking or setting timing
- Removing hydraulic chain tensioner of cylinder bank 2
- Preloading the timing chain of cylinder bank 2
- Fixing the engine in the installation position on cylinder 1 (set valve timings)
- Replacing the exhaust camshaft adjuster on the left
- Removing special tool to pretension timing chain on cylinder bank 2
- Installing the hydraulic chain tensioner of cylinder bank 2
- Installing the sealing cap on the cylinder head of cylinder bank 2
- 11 36 116 Removing and installing/replacing intake adjuster, right (X7 M50i 2020-2022)
- Remove the sealing cap on the cylinder head of the cylinder bank 1
- Moving the crankshaft to the installation position to adjust the timings
- Checking the VANOS adjuster of cylinder bank 1
- Relieving the chain tensioner at cylinder bank 1 for checking or setting the valve timings
- Removing hydraulic chain tensioner of cylinder bank 1
- Preloading the timing chain of cylinder bank 1
- Fixing the engine in the installation position on cylinder 1 (set valve timings)
- Replacing the right intake adjuster
- Removing the special tool to pretension the timing chain at cylinder bank 1
- Installing the hydraulic chain tensioner of cylinder bank 1
- Install the sealing cap on the cylinder head of cylinder bank 1
- 11 36 118 Removing and installing/replacing exhaust camshaft adjuster, right (X7 M50i 2020-2022)
- Remove the sealing cap on the cylinder head of the cylinder bank 1
- Moving the crankshaft to the installation position to adjust the timings
- Checking the VANOS adjuster of cylinder bank 1
- Relieving the chain tensioner at cylinder bank 1 for checking or setting the valve timings
- Removing hydraulic chain tensioner of cylinder bank 1
- Preloading the timing chain of cylinder bank 1
- Fixing the engine in the installation position on cylinder 1 (set valve timings)
- Replacing the right exhaust camshaft adjuster
- Removing the special tool to pretension the timing chain at cylinder bank 1
- Installing the hydraulic chain tensioner of cylinder bank 1
- Install the sealing cap on the cylinder head of cylinder bank 1
- 11 36 125 Removing and installing/replacing intake VANOS central valve (X7 M50i 2020-2022)
- Moving the crankshaft into the installation position of cylinder bank 1
- Checking the VANOS adjuster of cylinder bank 1
- Relieving the chain tensioner at cylinder bank 1 for checking or setting the valve timings
- Removing hydraulic chain tensioner of cylinder bank 1
- Preloading the timing chain of cylinder bank 1
- Fixing the engine in the installation position on cylinder 1 (set valve timings)
- Replace intake central valve, right
- Removing the special tool to pretension the timing chain at cylinder bank 1
- Installing the hydraulic chain tensioner of cylinder bank 1
- 11 36 126 Remove and install/replace the exhaust VANOS central valve (X7 M50i 2020-2022)
- Moving the crankshaft into the installation position of cylinder bank 1
- Checking the VANOS adjuster of cylinder bank 1
- Relieving the chain tensioner at cylinder bank 1 for checking or setting the valve timings
- Removing hydraulic chain tensioner of cylinder bank 1
- Preloading the timing chain of cylinder bank 1
- Fixing the engine in the installation position on cylinder 1 (set valve timings)
- Replacing the right central exhaust valve
- Removing the special tool to pretension the timing chain at cylinder bank 1
- Installing the hydraulic chain tensioner of cylinder bank 1
- 11 36 114 Removing and installing/replacing left exhaust camshaft adjuster (X7 M50i 2020-2022)
Factory Service Tools
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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.
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