Contents: Removal ↡ Installation ↡
Removal
1. Remove the gearbox.
2. Remove the lower engine splash shield.
3. Drain the engine oil from the engine.
4. Drain the coolant from the cooling system.
5. Remove the radiator and radiator fan.
6. To prevent damage to the air conditioning condenser, cover the condenser with a sheet of cardboard.
7. At the front of the cylinder head, remove the nuts and disconnect the lines from the rear self-leveling suspension hydraulic pump.
8. On models with air conditioning, remove the accessory drive belt and disconnect the wires from the air conditioning compressor.
9. From the top of the engine compartment bulkhead, remove the seal, unscrew the screws and remove the wiring harness cover.
10. On non-turbocharged models, remove the air intake tube, release the retaining clips, remove the air cleaner cover and remove the filter element.
11. On turbocharged models, remove the air intake tube from the turbocharger.
12. Label and disconnect the coolant and vacuum hoses from the engine. If necessary, release the hoses from the mounting brackets or brackets on the engine.
13. Label and disconnect all electrical connectors on the engine. Release the wiring harness from the mounting brackets or brackets in the engine compartment. Remove the wiring harness from the engine.
14. On models with air conditioning, remove the accessory drive belt. Unbolt the air conditioning compressor from the engine and move it to the side without disconnecting the hoses from it.
15. Unscrew the nuts and disconnect the fuel supply and return lines from the fuel filter or fuel filter or high-pressure fuel pump. Close the hoses with plugs.
16. Disconnect the accelerator cable from the throttle linkage.
17. Unscrew the cap from the power steering reservoir and, using a syringe, suck out as much fluid as possible, then replace the cap.
18. Remove the union nuts and disconnect the lines from the power steering pump. Release the lines from the clamps or brackets on the engine.
19. Remove the liner from the front left wheel arch, then unscrew the nuts and disconnect the oil lines from the oil cooler.
20. From the flywheel side, unscrew the crankshaft speed sensor and remove the electrical wires from the mounting brackets. Secure the sensor with wires in the engine compartment so that it is not damaged during further work.
21. On automatic transmission models, unscrew the transmission fluid pipes from the heat exchanger.
22. Remove the brake booster vacuum hose from the vacuum pump.
23. Attach the engine to the lifting gear and lift it so that the weight of the engine is supported by the lifting gear.
24. Place a sheet of steel or cardboard between the rear of the cylinder head and the bulkhead to prevent damage when lifting the engine.
25. Finally, check that all hoses, pipes and electrical connectors are disconnected from the engine.
26. Working under the vehicle, unscrew the lower powertrain mount bolts on both sides of the engine.
27. Carefully remove the engine from the engine compartment. When removing the engine, tilt and rotate it if necessary so that it does not damage the engine compartment.
Installation
1. Installation is carried out in the reverse order of removal, taking into account the following points.
2. When installing the engine, tilt and rotate it as necessary so that it fits into place without causing damage.
3. Tighten all mounting bolts and nuts to the specified torque.
4. Connect all hoses and electrical connectors to the engine according to the markings made earlier.
5. Connect and adjust the accelerator cable if necessary.
6. Install the auxiliary drive belt.
7. Install the radiator and radiator fan.
Article borrowed from the web portal: MERCEDESMAN.ru
8. Install the gearbox.
9. Fill the engine with motor oil and the cooling system with coolant.