Oil sump on models 316i, 318i
Figure W—1625
1. Oil sump
2. Hairpin
3. Cork
4. O-ring
5. Oil drain plug
6. O-ring, size A12x15.5-AL
7. Tray
8. Bolt
9. Lid
10. Oil pan gasket
11. Bolt
12. Bolt
13. Guide tube
14. O-ring
15. Bolt
16. Oil dipstick
17. O-ring
Models 320i, 325i, 328i
Drawing W 1626
1. Oil sump W-1634
2. Hairpin
3. O-ring
4. Cork
5. Nut
6. O-ring, size A12xl5,5-AL
7. Oil drain plug
8. Oil pan gasket
9. Bolt
10. Bolt
11. Bolt
12. Guide tube
13. O-ring
14. Bolt
15. Bracket
16. Bolt
17. Oil dipstick
18. O-ring
Withdrawal
Attention: Due to the lack of space to remove the oil sump, it is necessary to loosen both engine mounts and lift the engine, tilting it forward. For a detailed description of these work steps, see section "Removal and installation of the engine".
Disconnect the ground wire from the battery.
Attention: When the battery is disconnected, the information in the electronic memory devices, such as the engine trouble memory or the radio security code memory, is erased. When disconnecting the battery, follow the instructions in sections "Radio" And "Removing and installing the battery".
Attention: On vehicles with a six-cylinder engine, the battery is located in the luggage compartment on the right side next to the spare wheel.
Raise the car.
If equipped, remove the engine compartment undertray.
Drain engine oil.
Unscrew muffler pipe from manifold. Remove the exhaust system for spent cans as a set.
Remove the air filter housing by disconnecting the air intake hose from the throttle valve fitting.
Six-cylinder engine: Unscrew from the top of the radiator, unscrew from the generator and remove the generator ventilation duct.
Remove the heater fresh air duct.
Remove fan.
Unscrew the guide tube of the oil measuring rod, for which unscrew the bolt -14- (Six-cylinder engine, Drawing W 1626) or -15- (Four cylinder engine. Drawing W 1625). Pull the guide tube out of the oil sump.
Unscrew the expansion tank of the hydraulic system of the power steering (2 bolts) and pull the tank forward.
Remove the alternator/power steering pump V-belt.
Loosen the power steering pump (3 bolts) and hang on the side of the wire with connected hoses.
If present, unscrew the A/C compressor and hang it from the side with the hoses connected.
Unbolt left and right engine mounts from above.
On the underside of the vehicle, loosen the nuts on both engine mounts by 4 turns.
Hook up the engine with ropes and raise it on a hoist. In the absence of an appropriate lift, pull the cable through the slats on the engine and slide a sufficiently strong pipe under the cable and support it on sufficiently strong stands or on the grooves of the front fenders.
Attention: Do not support the pipe on the front fenders. Raise the engine slowly, making sure that the wires and hoses do not stretch or rub.
318is/ti models only: Unscrew the bottom of the oil sump to gain access to the mounting bolts.
Loosen the front and rear oil pan bolts (see picture) and lower the oil pan. To loosen the two front bolts, a narrow socket wrench with an extension is required.
Models 320i, 325i, 328i only: Remove the oil pump, otherwise the oil pan cannot be pulled out.
Pull the oil sump back.
Installation
Clean the surfaces of the oil sump and engine block.
Cover the transitions of the gear box cover and the top cover with an elastic sealing compound "3 Bond 1209".
Glue a new gasket with grease, then check the position of the gasket.
Caution: The gasket must be replaced.
Install oil sump.
Models 320i,325i,328i: Insert oil pump. Tighten the bolts to 20 Nm. 2 centering sleeves must be installed between the engine block and the oil pump housing. Insert the chain sprocket and tighten the nut (left hand thread) with a tightening torque of 25 Nm.
Tighten oil sump bolts by hand. After that, tighten it with a torque of 10 Nm.
Model 318is/ti: Screw on the lower part of the oil sump with a new gasket and tightening torque of the bolts to 10 Nm.
Insert and screw down the guide tube with a new O-ring.
Install the engine. Installation is carried out in the reverse order. Screw in both engine mounts with a screw tightening torque of 45 Nm.
Pour oil into the engine. The marks on the stem indicate the oil level in the engine. The difference between the min and max marks is 1 liter.
Lower the car.
Connect ground wire to battery.
After a test drive, check the oil sump for leaks and, if necessary, tighten all bolts carefully.
Install the engine compartment undertray.