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Refer to Instructions For Disconnecting And Connecting Battery. Disconnect negative battery lead. E46 Only Disconnect battery positive lead from battery connection point. Remove microfilter. Open cable duct on lower section of microfilter housing (2) and feed out cable(s). Release screws (1) and remove lower section of microfilter housing (2). Remove cover from fuel injectors. Caution: Do not mix up oxygen monitor sensors for cylinders 1 to 3 and 4 to 6 at plug connection to wiring harness. Mark plug connections. Unclip plug connections (1) from holder. Detach retainer (2) from battery positive lead. E46 Only Pull off complete rubber strip (1). Disconnect plug connection (2) on solenoid valve.

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Oil Separator – Cold Climate Conditions MODEL NEW E39 5 Series, E46 3 Series, E53 X5, E60 5 Series, E83 X3, E85 Z4 with M54 Engine SITUATION Certain areas of the US experience extremely cold climate conditions during the winter months. A small number of vehicles in the above series listed have experienced problems ranging from leaking or broken valve covers to complete engine failure. CAUSE Moisture accumulating in the engine oil separator, hose to oil dipstick guide tube or the orifice in the dipstick guide tube can freeze. When this occurs, depending on the position of the internal valve, this may either cause high crankcase pressures (stuck closed) resulting in valve cover leakage/breakage or cause an oil hydro-lock condition (stuck open) which could result in engine damage. NEW CORRECTION E39 In case of a customer complaint, replace the crankcase vent valve, crankcase vent hoses and remove and clean the oil dipstick guide tube orifice. E46, E53, E60, E83 and E85 In case of a customer complaint, replace the crankcase vent valve, crankcase vent hoses and dipstick guide tube

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Vehicle Application: 1998 BMW 528I 2.8L 2000 BMW 528IT 2.8L 2002 BMW X5 3.0L, Eng Cfg L6, Eng Des 1999 BMW 528IT 2.8L, Eng Des M52TU M54 2000 BMW 323I Sport Wagon 2.5L Customer Concern: Check engine light is illuminated in dash. Tests/Procedures: 1. Compare the actual engine temperature, as read by an infrared or contact thermometer, to the temperature shown on the scan tool. 2. If the temperatures are comparable, replace the coolant thermostat. A leaking thermostat will delay warm-up and keep the engine from coming up to proper temperature for closed loop operation. Potential Causes: Thermostat

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CAUTION: Left-hand threads. Using special tool 11 5 050 brace against pulley and unfasten cap nut from water pump using special tool 11 5 Remove fan wheel with fan coupling from water pump. For tightening torque, see 11 52 1AZ in ENGINE – TIGHTENING TORQUES NOTE: When using special tool 11 5 040, 30 N.m on the torque wrench scale are equivalent to a tightening torque of 40 N.m. Unfasten screws and detach fan from fan coupling. Fig. 605: Detaching Fan From Fan Coupling

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NOTE: If the drive belt is to be subsequently reused: Mark direction of travel and reinstall drive belt in same direction of travel. Remove fan clutch with impeller, refer to 11 52 020 REMOVING AND INSTALLING OR REPLACING FAN COUPLING (M62) . Layout of drive belt. Fig. 207: Layout Of Drive Belts Slacken screws (1) and relieve tension on belt drive. NOTE: Release screws (1 and 2) to remove complete belt tensioner. Remove drive belt. CAUTION: You must replace the drive belt if it is contaminated with hydraulic fluid.