BMW Serpentine Belt Idler Pulley DIY Solutions BEP00218

1. step 1 : Removing the Radiator Fan and Shroud 0:25

   • Disconnect the negative battery cable by loosening the 10mm nut
   • Remove the air collector push pin retainers
   • Remove the air collector
   • Disconnect the two electrical connectors on the passenger side of the fan shroud
   • Remove the T25 screw from the passenger side corner of the fan shroud
   • Remove the push pin retainer from the driver side corner of the fan shroud
   • Loosen the radiator fan clutch using a fan clutch tool
   • The fan clutch is reverse threaded
   • Remove the fan and fan shroud

2. step 2 : Removing the Serpentine Belt Idler Pulley 4:25

   • Turn the AC belt tensioner clockwise with a 16 mm socket
   • Remove the AC belt
   • Release the AC belt tensioner
   • Loosen the serpentine belt tensioner with a 16 mm socket
   • Insert a pin through the tensioner hold holes
   • Remove the serpentine belt
   • Remove the 16 mm idler pulley bolt to remove the idler pulley

3. step 3 : Installing the Serpentine Belt Idler Pulley 7:15

   • Install the idler pulley using the alignment tab as a guide
   • Install the 16 mm idler pulley bolt
   • Torque the 16 mm idler pulley bolt to 30 ft-lb
   • Replace the idler pulley cover if equipped
   • Slide the serpentine belt over the crank pulley, to the right around the power steering pulley, loop the belt around the tensioner pulley, and back over to the water pump pulley, bring the belt over the alternator pulley, then under the idler pulley
   • Loosen the tensioner with a 16 mm socket to get the belt under the idler pulley, then remove the pin and then release the tensioner
   • Loosen the AC tensioner with a 16 mm socket
   • Install the AC belt around the crank pulley and the AC pulley, and over the tensioner pulley
   • Release the AC tensioner

4. step 4 : Installing the Radiator Fan and Shroud 10:09

   • Lower the radiator fan and fan shroud together
   • Tighten the fan clutch onto the water pump pulley by turning it clockwise
   • Torque the fan clutch nut to 22-29 ft-lb if able
   • Install the fan shroud push pin retainer on the driver side
   • Install the fan shroud T25 screw on the passenger side
   • Reconnect the two electrical connectors on the passenger side of the fan shroud
   • Insert the air collector into the air filter box
   • Secure the air collector with the push pin retainers
   • Reconnect the negative battery cable and tighten the 10 mm nut

Tools needed

• Socket Extensions

  Torque Wrench

  Hammer

  16mm Socket

  Trim Tool Set

  T25 Socket

  Pick

  5mm Hex Wrench

  Side Cutters

  Flat Blade Screwdriver

  Fan Clutch Wrench

  10mm Socket

  Ratchet

  T20 Socket