BMW X3 2005

Removal & Installation


Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.

  1. Before servicing the vehicle, refer to the Precautions Section.
  3. Remove or disconnect the following:
    The drain plug is located on the exhaust side on cylinder 2 in the engine block.

    The engine fan. Refer to Engine Fan removal and installation
    Engine coolant. Close drain plug after coolant is removed. Tighten plug to 19 ft. lbs. (25 Nm)

    Coolant hose clamps and coolant hoses
    Bolts on thermostat housing
    Thermostat housing

    Click image to see an enlarged view

    Fig. Location and removal of coolant hoses from thermostat housing

    Click image to see an enlarged view

    Fig. Bolt removal from thermostat housing

    Click image to see an enlarged view

    Fig. Interior view of thermostat housing



To install:

Keep sealing faces clean and free of oil. The coolant thermostat is integrated in the coolant thermostat housing and can only be replaced as a single unit.

  1. Install or connect the following:

    New seal for thermostat housing
    Thermostat housing
    Coolant hoses to thermostat housing and tighten clamps
    Engine fan

  3. Refill with proper engine coolant.
  5. Test drive the engine until normal operating temperature is achieved.
  7. Check for leaks and proper function. Fill fluid as necessary.