Crankshaft Sprocket Installation Details for Series 111 Engine
Details of the installation of the chain guide on the cylinder head of the 111 series engine
M111
Crankshaft sprocket
1. The crankshaft sprocket installation details for the 111 series engine are shown in the illustration to which all references in the text refer.
2. Remove the oil pan (see Section Maintenance of the lubrication system).
3. Remove the timing belt cover (see Section Removal and installation timing belt covers).
4. Unbolt the sprocket (6) of the oil pump drive, or remove the pump assembly (see Section Maintenance of the lubrication system).
5. Remove the oil pump drive chain (8).
6. Remove the timing chain (see Section Replacing the timing chain), - to remove the chain from the crankshaft sprocket (11), move the tensioner bar to the side.
7. Using the puller (06), remove the crankshaft sprocket (11).
8. Installation is carried out in the reverse order. If necessary, the sprocket should be heated before mounting on the shaft journal, also make sure that the segment keys (12) are correctly positioned in the receiving groove. Chain guide on the cylinder head
9. The details of the installation of the chain guide on the cylinder head of the 111 series engine are shown in the illustration to which all references in the text refer.
10. Remove the front cover (23) of the cylinder head (see Section Removal and installation timing belt covers).
11. Turning the crankshaft in the normal direction, bring the piston of the first cylinder to the position 20° after TDC.
12. Using the locking pins (01), secure the inlet (75) and outlet (78) camshafts.
13. Remove the chain tensioner (14) (see below).
14. Unbolt and remove the chain guide (70).
15. Installation is carried out in reverse order.
Chain guides on the timing cover
Details of the installation of the chain guide on the timing cover of the 111 series engine
1. The details of the installation of the chain guide on the timing cover of the 111 series engine are shown in the illustration to which all references in the text refer.
2. Remove the cylinder head (see Section Removal and installation of cylinder head(s)).
3. Remove the timing belt cover (65) (see Section Removal and installation timing belt covers).
Note: There is no need to remove the oil pan - try not to damage the oil pan sealing gasket.
4. Remove the chain guide (6) from the carrier pin (8).
5. Installation is carried out in reverse order.
Chain tensioner
Timing Chain Tensioner Installation Details for Series 111 Engine
Timing Chain Tensioner Design for Series 111 Engine
1 - Plug; 2 - Return flow check valve ball; 3 - Spring; 4 - Ball guide; 5 - Aluminum sealing element; 7 - Rod; 8 - Spring; 9 - Spring loaded lock; 10 - Stop; 11 - Pressure reducing valve ball; 12 - Spring; 13 - Stop (pressed); 14 - Tensioner housing; 15 - Aluminum sealing element; 16 - Tensioner housing cover; 17 - Cylinder head; 18 - Bolt with washer; 19 - Tension bar; 20 - Cylinder head gasket; 21 - Timing chain; 22 - Plastic friction lining of the bar; A - Oil supply channel; B - Tensioner oil receiver
1. The installation details and design features of the timing chain tensioner for the 111 series engine are shown in the illustrations, to which all references in the text refer.
2. Remove the air cleaner cover (see Chapter Removal and installation air intake tract components).
3. On models equipped with an air boost system, remove the compressor.
4. To prevent the chain from jumping behind the crankshaft sprockets when removing it, turn the crankshaft in the normal direction and bring the piston of the first cylinder to the 20° after TDC position, - the inlet valve drive cam (26), visible through the oil filler neck, should turn with the working protrusion upward at an angle, - remove the cover (25).
5. Wrap the generator in a clean cloth.
6. Loosen the end plug (1) and remove the tensioner assembly (14).
7. Installation is carried out in the reverse order - do not forget to replace the sealing element (15).
8. Finally, start the engine and check the tensioner assembly for signs of developing leaks.
Tension bar
Tensioner bar installation details on 111 series engine
1. The details of the tension bar installation on the 111 series engine are shown in the illustration to which all references in the text refer.
2. Remove the cylinder head (see Section Removal and installation of cylinder head(s)).
3. Remove the timing belt cover (65) (see Section Removal and installation timing belt covers).
Note: There is no need to remove the oil pan - try not to damage the oil pan sealing gasket.
4. Remove the tension bar (19) from the support pin (17).
5. Installation is carried out in reverse order.
M112/113
Chain guides on the timing cover
(Material borrowed from an online resource MERCEDESMAN.ru)
Details of installation of chain guides on timing cover of engines of series 112 and 113
1 - Chain guides; 2 - Crankshaft; 3 - Balance shaft
1. The installation details of the timing chain guides on the 112 and 113 series engines are shown in the illustration to which all references in the text refer.
2. Remove the powertrain trim panels.
3. If necessary, remove the crankcase guard (see Chapter Body).
4. On models equipped with engine 113.942 (ML 230), remove the air deflector.
5. Drain the engine oil (see Chapter Changing engine oil and oil filter).
6. Remove the cylinder heads (see Section Removal and installation of cylinder head(s)).
7. Remove the lower section of the oil pan (see Section Maintenance of the lubrication system).
8. Remove the timing belt cover (see Section Removal and installation timing belt covers).
9. While simultaneously removing the chain guides from the mounting bolts (1).
10. Installation is carried out in reverse order.
Chain tensioner
M112/113 (except M113.965/981)
Timing Chain Tensioner Installation Details for Series 112 and 113 Engines (except 113.965/981)
1. Details of the installation of the chain tensioner on engines of the 112 and 113 series (except 113.965/981) are shown in the illustration, to which all references found in the text refer.
2. Remove the cooling fan assembly with viscous coupling (1).
3. Remove the fan cover (2).
4. Remove the accessory drive belt (3).
5. Remove the generator (4) (see Chapter Engine electrical systems).
6. Remove the tensioner (6) from the timing belt cover (5).
7. Installation is carried out in the reverse order - do not forget to replace the sealing element.
M113.965/981
Timing Chain Tensioner Installation Details for Engines 113.965/981
1. The details of the installation of the chain tensioner on engines 113.965/981 are shown in the illustration, to which all references in the text refer.
2. Remove the fan assembly (2 and 1).
3. Remove the generator (G2) (see Chapter Engine electrical systems).
4. Remove the tensioner (6) from the timing belt cover (5).
5. Installation is carried out in the reverse order - do not forget to replace the sealing element (7).