17 00 005 Draining and adding coolant (M54, M56)

WARNING: Danger of scalding! These tasks on the cooling system should only be carried out on an engine that has cooled down!

Recycling:

Catch and dispose of drained coolant.

Observe country-specific waste-disposal regulations.

NOTE: Follow instructions for working on cooling system. Use only recommended coolant.

Draining Coolant:

Open cap (1) on coolant expansion tank.

Fig 1: Identifying Cap On Coolant Expansion Tank

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Grip radiator adjusting screw (2) and undo drain plug (1) on radiator at bottom.

Fig 2: Removing Drain Plug On Radiator At Bottom

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Drain, catch and dispose of coolant.

Installation:

Replace sealing ring.

Tightening torque: 2.5 N.m.

Open drain plug (1) on engine block. Drain, catch and dispose of coolant.

Installation:

Replace sealing ring.

Tightening torque: 25 N.m.

Fig 3: Opening Drain Plug On Engine Block

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Adding Coolant:

The procedure is described in Venting cooling system and checking for leaks, refer to 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (M54 / M56) .