BMW Oil Cooler Thermostat TRQ ECA92801

1. step 1 : Removing the Radiator Fan and Shroud 0:24

   • 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 Air Filter Box 4:23

   • Disconnect the MAF electrical connector
   • Loosen the air filter box hose clamp
   • Disconnect the air tube from the air filter box
   • Release the air filter box lever latches
   • Remove the air filter box lid
   • Remove the air filter
   • Remove the two 10 mm bolts securing the air filter box
   • Disconnect the wiring from the retaining tab
   • Remove the air filter box

3. step 3 : Removing the Oil Cooler Thermostat 5:53

   • Remove the coolant reservoir cap
   • Open the radiator drain at the bottom driver side of the radiator to drain the coolant
   • Release the retaining clips to disconnect the upper radiator hose from the coolant reservoir and radiator
   • Remove the T20 radiator screw above the coolant reservoir
   • Remove the T20 coolant reservoir screw
   • Pry up the retaining clip to disconnect the coolant hose from the reservoir. More coolant will drain out, have a drain pan ready
   • Pull the reservoir retaining lever towards the center of the vehicle
   • Lift the reservoir straight up to remove it
   • Disconnect the coolant level sensor electrical connector
   • Remove the oil cooler thermostat

4. step 4 : Installing the Oil Cooler Thermostat 11:40

   • Insert the oil cooler thermostat using the keyway as a guide
   • Reconnect the coolant level sensor electrical connector
   • Lower the coolant reservoir onto the connections and lock the retainer
   • Reconnect the hose to the reservoir and lock the retainer
   • Install the T20 reservoir screw
   • Install the T20 radiator screw
   • Install the upper radiator hose onto the thermostat housing and lock the retainer
   • Install the upper radiator hose onto the radiator and coolant reservoir and lock the retainers

5. step 5 : Installing the Radiator Fan and Shroud 13:23

   • 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

6. step 6 : Installing the Air Filter Box 15:23

   • Lower the air filter box into position
   • Install the two 10 mm air filter box bolts
   • Install the air filter
   • Slide the air filter cover onto the air tube
   • Secure the air filter cover with the lever latches
   • Reconnect the MAF electrical connector
   • Tighten the air filter cover hose clamp
   • 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

7. step 7 : Refilling the Coolant 17:40

   • Use coolant specified by the vehicle manual
   • Fill the coolant reservoir
   • Remove the bleeder screw adjacent to the reservoir opening
   • Fill the reservoir until coolant flows out the bleeder opening
   • Reinstall the bleeder screw
   • Adjust the coolant level as necessary
   • Run the engine with the heat on to bleed the system
   • Adjust the coolant level as necessary

Tools needed

• Funnel

  Socket Extensions

  Trim Tool Set

  T25 Socket

  Pick

  Side Cutters

  Flat Blade Screwdriver

  Fan Clutch Wrench

  10mm Socket

  Drain Pan

  Ratchet

  T20 Socket

  22mm Socket