2. If there is no stand, you can disassemble the engine on a stand, workbench or on the floor, placing it firmly on supports. When working without a stand, carefully ensure that the engine does not tip over or fall.
3. If you are going to buy a rebuilt engine, first of all remove all external parts from the old engine for subsequent installation on the new engine (if you want to do all the other work yourself). These auxiliary parts include: (see Fig. 7.3, a, b):
- a) Brackets of auxiliary units (oil filter, generator, power steering pump, engine mounts, crankcase valve housing, etc.
- b) Thermostat and casing (see Chapter 3).
- c) Oil dipstick tube.
- d) All electrical switches and sensors.
- d) Intake and exhaust manifolds (chapter 4).
- e) Coil and spark plugs (chapter 5).
Fig. 7.3, a. Removing the oil filter housing...
Fig. 7.3, b....and crankcase ventilation housings
Note: When removing external parts from the engine, pay attention to the installation features that may be useful during assembly. Note the position of gaskets, seals, bolts, washers, etc.
4. If you purchase an engine in a "small kit", which includes a cylinder block complete with crankcase, crankshaft, pistons and connecting rods, then you must also remove the cylinder head, sump, oil pump and camshaft drive chain from the old engine.
5. If a complete overhaul of the engine is planned, it can be disassembled in the following order.
- a) Intake and exhaust manifolds (see chapter 4).
- b) Camshaft drive mechanism (chain, sprockets and tensioner).
- c) Cylinder head.
- d) Flywheel/drive plate.
- d) Oil pan.
- e) Oil pump.
- g) Pistons with connecting rods (paragraph 11).
- c) Crankshaft (paragraph 12).
Material taken from a web resource (mercedesman.ru)
6. Before you begin disassembling and repairing, make sure you have all the necessary tools. For more information, see the "Tools and Accessories" section.