Technical Service Bulletin # 170106
Date: 1104012010 BMW 750Li (F02) V84.4L Turbo (N63)
Page 202
Cooling System Information on Coolant Refilling
SI B17 01 06
Cooling System
April 2011
Technical Service
This Service Information bulletin supersedes SI B17 01 06 dated September 2007.
[NEW] designates changes to this revision
SUBJECT
Refilling Coolant Systems
MODEL
All
SITUATION
BMW recommends filling the cooling system for protection against freezing down to 34?F (37?C). This means an antifreeze ratio of
50% antifreeze and 50% water. In severely cold areas, the antifreeze can be increased to 60%, which provides freezing protection down
to 62?F (52?C). Do not exceed a 60% ratio of antifreeze. The specified antifreeze ratio is important, since an insufficient amount would
impair antifreezing and corrosion, inhibiting protection. An excessive amount would not improve freezing protection, but would instead
reduce freezing protection. At all times, the antifreeze and water should be premixed before pouring into the engine. If premixing is not
performed, damage will occur to the water pump assembly.
Since model year 2004 (and Z4 MY 2003), BMW has been using an engine coolant with a longterm life rating. The longterm
antifreeze/coolant must be completely drained and replaced only in conjunction with any Repairs that require replacement of aluminum or
metal cooling system components. The corrosion protection for these components is provided only in a new longterm coolant. On all
other repairs that involve draining of partial quantities of coolant, replace the drained quantities with new longterm antifreeze/coolant.
[NEW] Refer to SI B17 01 07 and B17 01 10 for additional information regarding BMW longterm antifreeze/coolant, maintenance,
repairs, replacement requirements and replacement procedures.
WARRANTY INFORMATION
For information only
Date: 1104012010 BMW 750Li (F02) V84.4L Turbo (N63)
Page 202
Cooling System Information on Coolant Refilling
SI B17 01 06
Cooling System
April 2011
Technical Service
This Service Information bulletin supersedes SI B17 01 06 dated September 2007.
[NEW] designates changes to this revision
SUBJECT
Refilling Coolant Systems
MODEL
All
SITUATION
BMW recommends filling the cooling system for protection against freezing down to 34?F (37?C). This means an antifreeze ratio of
50% antifreeze and 50% water. In severely cold areas, the antifreeze can be increased to 60%, which provides freezing protection down
to 62?F (52?C). Do not exceed a 60% ratio of antifreeze. The specified antifreeze ratio is important, since an insufficient amount would
impair antifreezing and corrosion, inhibiting protection. An excessive amount would not improve freezing protection, but would instead
reduce freezing protection. At all times, the antifreeze and water should be premixed before pouring into the engine. If premixing is not
performed, damage will occur to the water pump assembly.
Since model year 2004 (and Z4 MY 2003), BMW has been using an engine coolant with a longterm life rating. The longterm
antifreeze/coolant must be completely drained and replaced only in conjunction with any Repairs that require replacement of aluminum or
metal cooling system components. The corrosion protection for these components is provided only in a new longterm coolant. On all
other repairs that involve draining of partial quantities of coolant, replace the drained quantities with new longterm antifreeze/coolant.
[NEW] Refer to SI B17 01 07 and B17 01 10 for additional information regarding BMW longterm antifreeze/coolant, maintenance,
repairs, replacement requirements and replacement procedures.
WARRANTY INFORMATION
For information only
