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Integral coolant expansion tank

WARNING: This page is about a different car, the 2002 BMW Z3 and 2001 BMW Z3. However, it is still accessible from the selected car via links, so may be relevant.

Remove radiator. Refer to 17 11 000 REMOVING AND INSTALLING RADIATOR (Z3/M54)  .

  1. Prepare approx. 2 liters of cleaning agent.
  2. Fill radiator and coolant expansion tank and shake well. Wait a few minutes until oil has separated.
  3. Drain radiator and coolant expansion tank.
  4. Reinstall cleaned radiator and if necessary coolant expansion tank.
  5. Fill entire cooling system (heating control to "warm") with hot water and thoroughly flush by changing water several times.
  6. Check drained flushing fluid for traces of oil. If necessary, repeat Procedure 5.

After cleaning procedure, top up coolant. Refer to 17 00 005 DRAINING AND TOPPING UP COOLANT  .

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