Removal and installation of the oil pallet

Engine oil sump models 520i, 523i, 528i

Withdrawal

Attention: Due to the lack of space to remove the oil pan, it is necessary to release both engine mounts and lower front axle beam.

Disconnect ground wire (-) battery The battery is located in the luggage compartment behind the right side trim.

Attention: This erases the contents of memory devices, such as the engine trouble code memory. Follow the instructions given in the chapter "Removing and installing the battery".

Disconnect the air filter housing with intake air hose from the throttle valve connection and pull out of the engine compartment.

Raise the car, remove the bottom engine compartment cover.

Drain engine oil, see section "Maintenance work".



Release the clamp and remove the oil return hose from the oil separator at the guide tube of the oil level indicator.


Unscrew the fastening of the guide tube of the oil level indicator at the bracket, for which loosen the bolt -14- (see drawing W-1638). Pull the guide tube out of the oil pan upwards, observing the position of the O-ring.



Attach the engine to a lifting device and lift it up. If there is no lifting device, pass the appropriate cable through the engine lugs, put a reliable pipe under the cable and support it on the appropriate trestle or in the depressed belts in the wings.

Attention. Do not rest the pipe on the wings of the body. Slowly lift the engine up, while making sure that not a single wire or hose is stretched or squeezed. The BMW lifting device shown in the figure is mounted on the left and right of the underframe.

Using a lifting device, slowly raise the motor by approx. 5 mm.



Disconnect the steering shaft from the steering gear. To do this, release the clamp and remove the cardan joint from the steering mechanism.


Loosen the power steering pump mounting and hang the pump with attached pipes on the engine with a wire.

Attention: Do not disconnect the pipes from the pump, otherwise the oil will leak out. However, if the hydraulic system is opened, it must be extremely clean, as dirt entering the system will cause malfunctions and damage.

Loosen the fasteners at both engine mounts at the top left and right by approx. 4 turns.

Remove the nuts securing both engine mounts from the underside of the vehicle.

If equipped, detach the oil lines from the holder on the oil pan.

Disconnect the engine oil level sensor connector at the oil pan.



Support the front axle carrier with a garage jack with a suitable adapter. The illustration shows a BMW adapter.


unscrew the mount front axle beams and lower it as low as possible.

Note: Do not loosen the attachment to the steering box and control arms.

Loosen the oil pan fasteners front and rear (drawing).

Lower the oil pan and pull it out towards the rear.

Note: If the oil sump cannot be pulled out, unscrew the pressure rod fastener on the left and right of the stabilizer and lower the front axle beam lower.

Installation

Clean the contact surfaces of the oil pan and engine block.



Seal the transitions to the sprocket housing cover and the chain bulkhead with Drei Bond 1209, a permanently elastic sealant. The sealant layer should be approx. 3 mm wide and approx. 2 mm high.

Lubricate the new oil pan gasket with some grease, then check that the gasket is installed correctly.

Caution: Always install a new gasket.

Attach oil pan.

Install oil pan bolts, but do not tighten. First, it is easy to tighten the bolts securing the pan to the gearbox, and then the bolts securing the engine. After that, tighten all bolts to a torque of 10 Nm, i.e. easy enough. If the mounting bolts are tightened too much, the gasket will be crushed and will not seal.

If fitted, route the oil lines through the holders on the oil pan.

Insert the guide tube of the oil level indicator with the sealing ring and screw it to the bracket. Always replace a damaged sealing ring.

Secure the oil return hose from the oil separator to the guide tube of the oil level indicator with a clamp.

Connect and lock the plug for the oil level sensor.

Screw stabilizer bars.

Raise the front axle beam and screw.

Screw the steering shaft to the steering gear, tighten the clamp bolt to 20 Nm.

Lower the engine and remove the engine jack. Tighten both engine mountings to 45 Nm.

Note: All motor supports and brackets are tightened to the following torques: M8 thread 25 Nm, M10 thread 45 Nm.

Install the power steering pump.

Fill with engine oil. There are 2 marks on the oil level indicator, between which the oil level must be located. The difference in oil quantities between the min and max marks is 1 liter.

Lower the car.

Install air filter.

Connect ground wire (-) battery. Set the clock, tune the radio to transmitting radio stations.

After a test drive, check the tightness of the oil pan, if necessary carefully tighten all bolts.

Install the lower engine cover.