17 00 005 Draining off and topping up coolant (M54)

WARNING: This page is about a different car, the 2003 BMW 525i, 2002 BMW 525i, and 2001 BMW 525i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Danger of scalding! Only perform this work after engine has cooled down.

Recycling

Catch and dispose of drained coolant. Observe country-specific waste-disposal regulations.

NOTE: Follow instructions for working on cooling system.

Draining coolant:

Open cap on coolant expansion tank.

Slacken vent plug.

Fig 1: Opening Coolant Expansion Tank

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Remove front splash guard. See 13 32 051 REPLACING FUEL FILTER (M54)

Open drain plug (1) at bottom of radiator.

Installation:

Replace seal.

Drain, catch and dispose of coolant.

Fig 2: Draining Coolant From Radiator

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Open drain plug on engine block.

Installation:

Replace seal.

Tightening torque. Refer to COOLING SYSTEM - TIGHTENING TORQUES .

Drain, catch and dispose of coolant.

Fig 3: Opening Drain Plug On Engine Block

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Adding coolant:

NOTE: Slowly fill coolant expansion tank with coolant.

Screw in vent plug when bubble-free coolant emerges.

Pour coolant into coolant expansion tank up to max. cold fill level.

NOTE: The tank mark indicates the fluid level at approx. 20°C.

Use only recommended coolant.

Vent cooling system and check for leaks.

Fig 4: Identifying Coolant Filling Level

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