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Removing and installing engine BMW S50

11 00 050

Special tools required:

11 002 0

Follow instructions for disconnecting and connecting battery, refer to general instructions in MG 12.

Disconnect negative battery lead.

BMW E36

Lift engine hood into assembly position and remove firewall (air manifold). These work steps are described in Removing complete wiper bracket.

BMW Z3

Move engine hood to assembly position:

Note:

The following work must be carried out with a second person assisting. Work instruction applies to left and right sides.

Hold engine bonnet/hood.

Unclip retainer (1).

Unhook damper and suspend in ball head (2).

Remove complete manifold.

Drain coolant.

Remove complete radiator with oil cooler.

Remove transmission.

Remove alternator drive belt.

Remove drive belt for air pump and A/C compressor.

Only for air-conditioning systems:

Disconnect plug connection from air-conditioning compressor.

Remove air-conditioning compressor from engine mount (pipes remain connected!)

Only for air-conditioning systems:

Completely remove hose clips from air pump.

Remove hoses.

Only for air-conditioning systems:

Disconnect plug connection (1) from air pump.

Unfasten screw connections (2 and 3).

Remove air pump.

Only for air-conditioning systems:

Remove bearing block for air pump (3 screws).

Only for air-conditioning systems:

Completely untighten screw on air-conditioning compressor.

Leads remain connected!

Tie air-conditioning compressor to one side, relieving tension on pipes.

Remove vane pump for hydraulic steering gear from engine bracket and tie back to one side.

Leads remain connected!

Remove coolant-air guide from alternator.

Unscrew nut from bottom-right engine mount.

Installation:

Tightening torque, refer to Technical Data 11 81 1AZ.

Unfasten ground strap on engine support.

Lower vehicle.

Unscrew nut from bottom-left engine mount.

Installation:

Tightening torque, refer to Technical Data 11 81 2AZ.

Remove hydraulic container from engine support arm.

Leads remain connected!

Caution!

Catch and dispose of fuel as it escapes.

Follow instructions for removing and installing fuel hoses.

Loosen fuel supply line and return line.

Remove cover from plug connections at VANOS control unit.

Remove ground strap (1) and cable tie (2) from VANOS adjustment unit.

Disconnect plug connections of solenoid valves (1) and (2) of VANOS adjustment unit.

Disconnect plug-in connections at holder:

  1. Solenoid valve 2 on VANOS adjustment unit
  2. Position sensor of exhaust camshaft
  3. TDC sensor of cylinder 1 on intake camshaft
  4. TDC sensor of crankshaft at vibration damper

Disconnect plug-in connections at holder:

  1. Throttle potentiometer
  2. Position sensor of exhaust camshaft

Remove cable strap.

Remove connecting strip from injection valves and lay to one side.

Unfasten screws.

Remove ignition-coil cover.

Disconnect plug-in connections at ignition coils.

Unscrew earth connection (1).

Unfasten retainer on ignition cable guide (2).

Remove ignition coil cable and cable guide from cylinder head cover.

Remove ground strap behind cylinder head.

Unclip diagnosis socket and place to one side with complete wiring harness.

Unfasten connections on starter motor.

Installation:

Tightening torque, refer to Technical Data 12 41 4AZ:

4AZ Electrical leads to starter
All M5 5 Nm
All M6 7 Nm
All M8 13 Nm

Unfasten connections on alternator.

Installation:

Tightening torque, refer to Technical Data 12 31 1AZ:

Type Thread Tightening specifications Torque
1AZ Wires to alternator
Terminal D+
M10 / M20 5 Nm
alle / others M6 7 Nm
Terminal B+
S38 / B38 8 Nm
alle / others M8 13 Nm

Unfasten plug connection:

  1. Coolant temperature sensor for control unit
  2. Coolant-temperature sensor for remote-thermometer sensor

Unfasten plug connection.

  1. Sensor for engine-oil pressure
  2. Engine-oil-temperature sensor

Disconnect plug-in connection at solenoid for vacuum control of non-return valve of air pump.

Unfasten plug connection:

  1. Knock sensor for cylinders 1 and 2
  2. Knock sensor for cylinders 3 and 4
  3. Knock sensor for cylinders 5 and 6

Caution!

Confusing the plug connections of knock sensors gives rise to engine damage.

Disconnect plug-in connection from idle-speed control valve.

Unfasten hose clip (1) and screw (2).

Remove oil separator from cylinder head.

Retaining rail for engine wiring harness:

Unscrew screw.

Removing wiring harness.

Unscrew screw.

Unscrew coolant hoses on left-hand side of engine block.

Unscrew coolant hoses on left-hand side of engine block.

Unscrew coolant hose from expansion tank.

Remove hose for tank ventilation from rear of cylinder head.

Remove lower section of steering spindle completely.

Fit engine to special tool 11 0 020.

Layout of front engine mount.

Caution!

Only raise engine on locating lugs provided for this purpose.

Layout of rear engine mount.

Caution!

Do not damage throttle-valve assembly.

Unfasten engine support arm from engine block.

Caution!

Do not damage brake leads at ABS hydraulic unit!

Carefully lift out engine.

Installation:

First screw down right engine mount at bottom, then lower engine from above onto mount.


Categories: 11 Engine
Tags: e36s50z3
tisbimmer :
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