Remove the piston rings

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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