Remove the piston rings

WARNING: This page is about a different car, the 2022 BMW X7, 2021 BMW X7, 2020 BMW X7, and 2019 BMW X7. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Component with heavy weight .
Injury hazard!

Note component's center of gravity.
Support component using a jack.
Secure component against falling off the jack.

CAUTION: On releasing high pressure line, fuel may emerge at high speed .
Injury hazard!

Wear suitable personal protective equipment.
Before performing any installation work, allow cooling system to cool down to less than 40°C.
Note warnings on cylinder head cover.

NOTE: TECHNICAL INFORMATION
Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.

Preliminary work

Refer to REMOVING THE COMPLETE FRONT AXLE WITH THE ENGINE AND TRANSMISSION .
Refer to REMOVING THE ENGINE FROM THE FRONT AXLE .
Refer to INSTALLING THE ENGINE ON THE ASSEMBLY JIG .
Refer to RELEASING THE OIL DRAIN PLUG .
Refer to TIGHTENING THE OIL DRAIN PLUG .
Refer to REMOVING CHARGE AIR LINE .
Refer to REMOVING ACOUSTIC COVER AT REAR .
Refer to REMOVING ALL IGNITION COILS .
Refer to REMOVING ALL SPARK PLUGS .
Refer to REMOVING THE HIGH PRESSURE LINE BETWEEN THE HIGH PRESSURE PUMP AND THE RAIL .
Refer to REMOVING HIGH PRESSURE PUMP .
Refer to REMOVING THE HIGH-PRESSURE RAIL WITH INJECTORS OF CYLINDERS 1 TO 3 .
Refer to REMOVING THE HIGH-PRESSURE RAIL WITH INJECTORS OF CYLINDERS 4 TO 6 .
Refer to REMOVING BOTH ACTUATORS .
Refer to REMOVING THE CYLINDER HEAD COVER .
Refer to REMOVING TANK VENT VALVE .
Refer to REMOVING THE INTAKE PLENUM .
Refer to REMOVING THE LAMBDA OXYGEN SENSOR .
Refer to REMOVING THE OXYGEN SENSOR MONITOR .
Refer to REMOVING CATALYTIC CONVERTER .
Refer to REMOVING THE OIL RETURN LINE FOR THE EXHAUST TURBOCHARGER .
Refer to REMOVING THE COOLANT LINE BETWEEN THE COOLANT PUMP AND CYLINDER HEAD .
Refer to BLOCKING ENGINE IN TDC FIRING POSITION .
Refer to REMOVING CHAIN TENSIONER .
Refer to RELEASING THE VANOS CENTRAL VALVE OF THE INTAKE ADJUSTER .
Refer to RELEASING VANOS CENTRAL VALVE OF THE EXHAUST CAMSHAFT ADJUSTER .
Refer to REMOVING THE VANOS CENTRAL VALVE OF THE INTAKE ADJUSTER .
Refer to REMOVING THE VANOS CENTRAL VALVE OF THE EXHAUST CAMSHAFT ADJUSTER .
Refer to REMOVING INTAKE ADJUSTER .
Refer to REMOVING EXHAUST CAMSHAFT ADJUSTER .
Refer to REMOVING THE TEST GAUGES FOR SECURING THE CAMSHAFTS .
Refer to REMOVING THE CYLINDER HEAD .
Refer to REMOVING THE CYLINDER HEAD GASKET .
Refer to REMOVING FRONT AXLE DIFFERENTIAL .
Refer to REMOVING BEARING BRACKET .
Refer to REMOVING OIL SUMP .
Refer to REMOVING OIL PUMP .
Refer to REMOVING THE OIL DEFLECTOR .
Refer to REMOVING ALL THE PISTONS WITH THE CONNECTING ROD .
Refer to MEASURING ALL PISTONS .
Refer to MEASURING A CYLINDER .

NOTE: RISK OF DAMAGE
Very wide spreading of the piston rings during installation/removal .
Damage to the piston rings .

Spread the piston rings only until the piston ring can just be slid over the piston.
Use piston ring pliers to install and remove the piston rings.

NOTE: TECHNICAL INFORMATION
Wear safety goggles.

NOTE: The description is provided only at one component. The procedure is the same for all other components.

Keep standard piston ring pliers (1) ready.

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Position the piston ring pliers (1) on the top piston ring (2) .

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Tension the piston ring pliers (1) in the arrow direction. Feed out and remove the top piston ring (2) .

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Position the piston ring pliers (1) on the middle piston ring (2) .

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Tension the piston ring pliers (1) in the arrow direction, feed out and remove the middle piston ring (2) .

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Remove the oil scraper rings (1) and the spring (2) by hand.

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Feed out both oil scraper rings (1) in the arrow direction on the piston (2) .

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Feed out and remove the spring (1) in the arrow direction on the piston (2) .

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