Contents: Examination ↡ 6-cylinder petrol engine 112 ↡
Examination
1. Check the engine oil level, refer to Section Checking fluid levels, leak monitoring.
2. Warm up the engine to operating temperature. To do this, start the engine and wait until the instrument panel displays the normal coolant temperature. To do this, turn on the coolant temperature indicator on the instrument panel display. Then drive the car for about 5 km to ensure that the engine oil reaches its operating temperature.
Note: At the service station, the oil temperature is checked by inserting a thermometer into the hole of the oil level indicator. The specified value is + 90°C.
3. Oil pressure is measured at the oil filter cap. This requires a special filter cap (special tool) with connection for pressure gauge.
- Replacement oil filter cover required.
The lid can be made as follows:
4. Drill an 8mm diameter hole in the center of the lid.
5. Drill a 2mm diameter hole into the M6 Allen screw.
6. Cut an M6 thread into the connecting nipple of the M12 x 1.5 hose.
7. Insert the screw with the 6.5 x 18 sealing washer from the inside into the hole in the oil filter cover.
8. Install the 12 x 17 aluminum sealing ring and hose connection nipple on the outside of the cover. Screw the Allen screw into the connection nipple.
9. 4-cylinder petrol engine: Unscrew the oil filter cover using a 74 mm socket or HAZET 2169.
10. Remove the cover with the filter element (2). (3) - sealing ring.
11. Diesel engine: Unscrew the oil filter cover (1) using the HAZET 2169 tool (2) and a 27 mm socket (3). The illustration shows a 611 engine.
12. Insert a new filter element into the oil filter housing.
13. Screw on the cover with the connection for testing (special tool) and a sealing ring.
(Material based on data from the portal: MercedesMAN.ru)
14. Attach a pressure gauge to check the oil pressure to the hose of the connecting fitting.
15. Start the engine and let it idle.
16. Oil pressure should not be less than 0.3 atm. Otherwise, it is necessary to check the lubrication system (pump, bearings, etc.).
17. When increasing engine power, the oil pressure should immediately increase and at 3000 rpm of the engine should be at least 3 atm.
18. Stop the engine.
19. Unscrew the pressure gauge.
20. After completing the oil pressure check, install the standard oil filter cover with a new O-ring.
6-cylinder petrol engine 112
1. The oil pressure is checked at the measuring hole on the end side of the engine.
2. Remove the engine cover or air filter vertically upwards.
3. Remove the fan cover with the electric motor, refer to Section Removal and installation the fan.
4. Unscrew the threaded plug of the hole for measuring the oil pressure, located in the lower part of the oil filter housing on the distribution mechanism housing.
5. Screw in the threaded plug with a new sealing ring and tighten it to a torque of 20 Nm.
6. Install the cover with the electric fan.
7. Install the engine cover or air filter on top.