How to remove engine on 2005 BMW 325

Removal & Installation

M62 Engines

1. Before servicing the vehicle, refer to the Precautions section.
2. Drain the cooling system.
3. Relieve the fuel system pressure.
4. Raise the hood all the way up into the service position. This usually requires disconnecting the gas struts and securing the hood hinges with bolts.
5. Remove or disconnect the following:
   
   
   Negative battery cable

   Engine splash shield

   Radiator

   Nut holding the transmission oil cooler lines to the engine oil pan, if equipped

   Transmission assembly

   Drive belts for the power steering pump and the air conditioner compressor, then remove the bolts holding the pump and compressor to the engine and remove them from the engine, keeping the high pressure hoses connected. Secure the pump and compressor out of the way and without any tension or binding on the hoses.

   Hoses from the coolant reservoir expansion tank, then remove the fasteners on the side of the expansion tank and remove the expansion tank from the engine compartment

   Heater hoses from the heater control valve and the heater core inlet pipe

   Electrical connections to the ignition coil, then the air cleaner housing assembly

   Idle speed control valve from the intake duct

   Wire harness connectors for the air flow meter, then the ducting to the air flow meter and crankcase breather vacuum line

   With a cable operated throttle, cruise control cable and the throttle cable at the throttle, then remove the cable mounting bracket

   With an electronically controlled throttle, electrical connector to the throttle control unit

   Wiring harness from the starter, then the electrical connectors located near the starter motor assembly

   Oil level sender connector and the wiring harness from the alternator

   Air duct to the alternator

   Fuel tank venting valve and the hose to the canister

   Fuels lines for the fuel rail

   Vacuum line from the brake booster and plug the opening

   Wiring harness connections to the temperature sensors and the Digital Motor Electronics (DME)

   Engine ground cable and verify that all remaining fluid lines or electrical leads have been disconnected and properly placed aside

   Engine mount nuts and bolts and carefully lift the engine from the vehicle
   
   
6. Installation is the reverse of the removal procedure. When installing the engine, place the mount stud in hole (1) of the support bracket. Use the following torque values:
   
   
   6mm fasteners: 61 inch lbs. (7 Nm)

   7mm fasteners: 10 ft. lbs. (13 Nm)

   8mm fasteners: 16 ft. lbs. (22 Nm)

   10mm fasteners: 31 ft. lbs. (42 Nm)
   
   

   

   

   Fig. Engine front lift point

   
   
   

   

   

   Fig. Engine rear lift point

   
   
   

   

   

   Fig. During installation on M62 and S62 engines, place mount stud in hole (1) of the support bracket
   
   

M73 Engines

1. Before servicing the vehicle, refer to the Precautions section.
2. Drain the cooling system.
3. Relieve the fuel system pressure.
4. Remove or disconnect the following:
   
   
   Negative battery cable

   Hood

   Splash guard

   Transmission assembly

   Power steering pump with the hoses attached

   Air conditioner compressor, leaving the high pressure hoses attached

   Air intake hose, then the mounting nut, and air cleaner housing assembly

   On 750 models, oil filter cover bolt, oil cooler lines and the connector from the oil pressure switch

   Idle speed control valve and intake hoses. Disconnect the electrical connector, remove the mounting nut, and pull the idle speed control valve out of the air intake hose.

   Air flow sensor, disconnecting the vacuum hose from the PCV system at the same time

   Coolant reservoir expansion tank

   Engine coolant hoses at both the control valve and at the heater core

   Throttle and cruise control cables at the throttle lever, then remove the cable housing retainer and remove the housing and cables

   Light gauge wires from the starter motor, and with the positive battery cable disconnected from the battery, remove the starter motor with the battery cable attached

   Fresh air hose from the alternator

   Electrical connection for the O ₂ S sensor, and disconnect the surrounding electrical connections and place the wire harness safely aside

   Fuel rail supply and return lines

   Fuel pipe at the injector supply manifold, then disconnect the harness electrical connectors. Disconnect the electrical connector at the throttle body, lift off the protective caps, remove the attaching nuts for the protective cover for the fuel injector wiring harness and remove it.

   Engine ground cable, then remove the engine mount nut from the top on both sides
   
   
5. Attach a suitable lifting attachment to the engine and carefully support the engine.
6. Slowly and carefully lift the engine out of the vehicle, tilting the front of the engine upward for clearance. Use care to not damage the painted surfaces of the front radiator support.

To install:

1. Installation is the reverse of the removal procedure, while using the following torque values:
   
   
   6mm fasteners: 61 inch lbs. (7 Nm)

   7mm fasteners: 10 ft. lbs. (13 Nm)

   8mm fasteners: 16 ft. lbs. (22 Nm)

   10mm fasteners: 31 ft. lbs. (42 Nm)
   
   

N52 Engines

CAUTION

Aluminum-magnesium material. No steel fasteners may be used due to the threat of electrochemical corrosion. A magnesium crankcase requires aluminum fasteners exclusively. Aluminum fasteners must be replaced each time they are removed. The end faces of aluminum fasteners are painted blue for purposes of identification. Torque specifications and torque angles must be observed for risk of damage.

1. Before servicing the vehicle, refer to the Precautions section.
2. Drain the cooling system and engine oil.
3. Relieve the fuel system pressure.
4. Raise the hood all the way up into the service position. This usually requires disconnecting the gas struts and securing the hood hinges with bolts.
5. Secure the engine with a holding tool to prevent it from tilting.
6. Remove or disconnect the following:
   
   CAUTION

   Do not disconnect coolant pipe from crankcase.
   
   
   
   NOTE

   Do not disconnect hydraulic lines.
   
   
   
   
   Negative battery cable

   Exhaust system

   Transmission assembly

   Intake filter housing

   Fan cowl with electric fan

   Radiator and hoses

   Water pump

   Thermostat

   All coolant hoses from engine

   Intake manifold

   Vacuum line and hose from brake booster

   Ignition wiring harness, secure and set aside.

   Engine wiring harness, secure and set aside

   Fuel injector rail, secure and set aside
   
   
   
   
   A/C compressor, set down and secure on front axle carrier
   
   
   
   
   Power steering pump, set down and secure on front axle carrier

   If equipped with Dynamic Drive, remove bracket

   Verify that all remaining fluid lines or electrical leads have been disconnected and properly placed aside

   Engine mount nuts and bolts and carefully lift the engine from the vehicle
   
   
7. Installation is the reverse of the removal procedure. Check DME function. Replace all aluminum bolts. Use the following torque values:
   
   
   6mm fasteners: 61 inch lbs. (7 Nm)

   7mm fasteners: 10 ft. lbs. (13 Nm)

   8mm fasteners: 16 ft. lbs. (22 Nm)

   10mm fasteners: 31 ft. lbs. (42 Nm)
   
   

N62 Engines

1. Before servicing the vehicle, refer to the Precautions section.
2. Drain the cooling system.
3. Relieve the fuel system pressure.
4. Raise the hood all the way up into the service position. This usually requires disconnecting the gas struts and securing the hood hinges with bolts.
5. Secure the engine with a holding tool to prevent it from tilting.
6. Remove or disconnect the following:
   
   
   Negative battery cable

   Transmission assembly

   Radiator and hoses

   Expansion tank

   Intake manifold

   Heater hoses

   Engine wiring harness from the control unit

   Spark plug wiring harness

   Negative lead from spring strut dome

   Vacuum line and hose from vacuum pump

   Line on tank venting valve

   Both oxygen monitor and control sensors

   Negative lead from engine support arm

   Vibration damper and tensioning pulley fro A/C compressor drive belt

   Fasteners from power steering pump, secure pump aside

   Fasteners from A/C compressors, secure compressor aside

   Fasteners from ABS control unit, secure unit aside

   Lower universal joint from the steering spindle

   If equipped with Dynamic Drive, unlock and detach the hydraulic line

   Verify that all remaining fluid lines or electrical leads have been disconnected and properly placed aside

   Engine mount nuts and bolts and carefully lift the engine from the vehicle
   
   
7. Installation is the reverse of the removal procedure. Use the following torque values:
   
   
   6mm fasteners: 61 inch lbs. (7 Nm)

   7mm fasteners: 10 ft. lbs. (13 Nm)

   8mm fasteners: 16 ft. lbs. (22 Nm)

   10mm fasteners: 31 ft. lbs. (42 Nm)
   
   

S62 Engines

1. Before servicing the vehicle, refer to the Precautions section.
2. Properly discharge the A/C system.
3. Drain the cooling system.
4. Relieve the fuel system pressure.
5. Raise the hood all the way up into the service position. This usually requires disconnecting the gas struts and securing the hood hinges with bolts.
6. Remove or disconnect the following:
   
   
   Negative battery cable

   Retaining clips from air ducts

   Turn duct upwards to unlock, then pull forward and out

   Connections on Digital Motor Electronics (DME) control unit

   Wiring harness connections in electronics box

   Retaining clips from heater bulkheads

   Lay engine wiring harness on engine

   Oil pressure switch connector

   Grounding cable and main flow oil filter housing from holder

   Fasteners on right floor panel

   Pull floor panel down and disconnect positive battery lead

   Release expansion rivet and withdraw positive battery lead from holders

   Remove transmission

   Alternator drive belt

   A/C compressor drive belt and compressor

   Power steering pump bolts and secure pump aside

   Left side filter housing

   Low pressure lead from brake booster

   Locks and clips from fuel hose, then the fuel hose

   Vacuum line and cooling system hoses

   Right exhaust manifold

   Ground strap from right engine support

   Top left and right nuts from engine mount

   Intake manifold cover

   Verify that all remaining fluid lines or electrical leads have been disconnected and properly placed aside

   Carefully lift the engine from the vehicle
   
   
7. Installation is the reverse of the removal procedure. When installing the engine, place the mount stud in hole (1) of the support bracket. Use the following torque values:
   
   
   6mm fasteners: 61 inch lbs. (7 Nm)

   7mm fasteners: 10 ft. lbs. (13 Nm)

   8mm fasteners: 16 ft. lbs. (22 Nm)

   10mm fasteners: 31 ft. lbs. (42 Nm)
   
   

   

   

   Fig. Engine ground strap and mount