Remove the piston rings

CAUTION: Component with heavy weight.
Danger of injury!

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.
Danger of injury!

Wear suitable personal protective equipment.
Allow the cooling system to cool down to a temperature below 40°C before starting installation work.
Note warnings on cylinder head cover.

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

Preliminary works

Refer to REMOVING ENGINE .
Refer to INSTALLING THE ENGINE ON THE ASSEMBLY STAND
Refer to RELEASING THE OIL DRAIN PLUG .
Refer to TIGHTENING THE OIL DRAIN PLUG .
Refer to REMOVING ALL SPARK PLUGS .
Refer to REMOVE THE HIGH PRESSURE LINE BETWEEN THE HIGH PRESSURE PUMP AND THE RAIL .
Refer to REMOVE HIGH PRESSURE PUMP .
Refer to REMOVING THE RAIL WITH INJECTORS .
Refer to REMOVING BOTH ACTUATORS .
Refer to REMOVING THE CYLINDER HEAD COVER .
Refer to REMOVE TANK VENT VALVE .
Refer to REMOVING THE INTAKE PLENUM .
Refer to REMOVE THE HEAT SHIELD AT THE CYLINDER HEAD
Refer to REMOVING THE OIL RETURN LINE FOR THE EXHAUST TURBOCHARGER .
Refer to REMOVE THE COOLANT RETURN LINE FOR THE EXHAUST TURBOCHARGER .
Refer to REMOVE THE COOLANT FEED LINE FOR THE EXHAUST GAS TURBOCHARGER .
Refer to BLOCKING ENGINE IN THE 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 REMOVE THE VANOS CENTRAL VALVE OF THE EXHAUST CAMSHAFT ADJUSTER .
Refer to REMOVING INTAKE ADJUSTER .
Refer to REMOVE EXHAUST CAMSHAFT ADJUSTER .
Refer to REMOVE THE TEST GAUGES TO FIX THE CAMSHAFTS .
Refer to REMOVING THE CYLINDER HEAD .
Refer to REMOVING THE CYLINDER HEAD GASKET .
Refer to REMOVING THE ACOUSTIC COVER OF THE OIL SUMP .
Refer to REMOVING FLYWHEEL .
Refer to REMOVE FRONT AXLE DIFFERENTIAL .
Refer to REMOVE BEARING SUPPORT .
Refer to REMOVE OIL PAN
Refer to REMOVE THE OIL VACUUM PUMP .
Refer to REMOVING THE OIL DEFLECTOR
Refer to REMOVING ALL PISTONS WITH CONNECTING ROD .
Refer to MEASURING A CYLINDER .
Refer to MEASURING PISTON .

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 for one component only. The procedure is identical for all further 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 direction of arrow, 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 direction of arrow, feed out and remove the middle piston ring (2).

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

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

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

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