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Home >> BMW >> 1991 >> 525i Automatic >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine - Repair >> Removal & Installation >> Engine >> Installation

Removal & Installation: Engine: Installation

  1. To install, reverse removal procedure. Ensure serpentine belt is correctly routed and properly seated in grooves. Turn 32-mm Wrench (11-5-040) counterclockwise, and tighten cooling fan nut to 22 ft. lbs. (30 N.m).
    NOTE: Tighten cooling fan nut to 29 ft. lbs. (40 N.m) if using a conventional 32-mm open end wrench.
  2. Fill and bleed cooling system. To do so, turn ignition on. Place A/C-heater controls on HEAT position to ensure heater valve is open. Add coolant to expansion tank. Run engine at 2500 RPM and add coolant to expansion tank as level drops.


  1. To install, reverse removal procedure. Ensure serpentine belt is correctly routed and properly seated in grooves. Turn 32-mm Wrench (11-5-040) counterclockwise, and tighten cooling fan nut to 22 ft. lbs. (30 N.m).
    NOTE: Tighten cooling fan nut to 29 ft. lbs. (40 N.m) if using a conventional 32-mm open end wrench.
  2. Fill and bleed cooling system. To do so, add coolant to expansion tank and fill to level mark. Place A/C-heater control on WARM setting to ensure heater valve is open. Start and run engine at fast idle speed. Open bleed screw on expansion tank and continue to add coolant to expansion tank as coolant level drops. Tighten bleed screw as soon as coolant is free of air bubbles.
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