BMW Repair Questions? Ask a Mechanic for Answers ASAP
This Service Information bulletin supersedes SI B12 04 05 July 2007.
[NEW] designates changes to this revision
[NEW] E85 and E86 (Z4) with N52 engine
[NEW] E70 (X5) with N52K engine
[NEW] E90, E91, E92 and E93 (3 Series) with N51, N52 and N52K engines
[NEW] E60 and E61 (5 Series) with N52 and N52K engine
[NEW] All models above produced up to December 31st, 2006
FC 2E81 Electric coolant pump, speed deviation, speed outside the tolerance
FC 2E82 Electric coolant pump cutoff, over-current
FC 2E83 Electric coolant pump, power-reduced operation, dry run
FC 2E84 Electric coolant pump, communication
FC 2E85 Electric coolant pump, communication, no voltage at emergency operation input of pump
BLEEDING (VENTING) THE COOLING SYSTEM
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.