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W116 (1972-1980, petrol) W126 (1979-1991, petrol) W140 (1991-1998) W220 (1998-2005)
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  • Removal and installation timing chain covers

Removal and installation timing chain covers (Mercedes-Benz S-Class W140)

0
Contents: Removal ↡ Installation ↡

Removal



Timing chain cover installation details (1 of 3), bringing the engine to the 45° position before…

Timing chain cover installation details (1 of 3), bringing the engine to the 45° position before TDC of the first cylinder piston (arrow)
1, 1a, 2 - Bolts; 01 - Rods; 4 - Bracket; 6 - Timing chain tensioner; 11 - Steering pump; 31, 34 - Exhaust camshaft sprockets; 32, 33 - Camshaft adjusters; 30, 30a - Lids


Timing Chain Cover Installation Details (2 of 3)

Timing Chain Cover Installation Details (2 of 3)
a, b, d, c - Bolts; 01 - Rods; 02 - Puller; 03 - Threaded insert; 3 - Water pump; 14 - Front crankshaft oil seal cover; 15 - Crankshaft oil seal; 35 - Cork; 36 - Seal; 37 - Tensioner lever pin; 33 - Tension lever


1. Bring the engine to a position 45° before TDC of the piston of the first cylinder.



2. Lock the camshafts using the rods (01).

3. On the left cylinder head, unscrew the bolts (1), (1a) and (2). Fasten the support plate with the power steering pump (11) and the connected pipes to the side.

4. Remove the front covers (30) and (30a).

5. Mark the relative positions of the sprockets (31), (32), (33) and (34) of the camshafts and the timing chain (arrows).

6. Remove the timing chain tensioner (6).

7. Remove the camshaft adjusters (32), (33) and the exhaust camshaft sprockets (31) and (34).

8. Remove the crankshaft pulley.

9. Loosen the tray mounting bolts and lower it.

10. Remove the cooling system pump (3).

11. Unscrew the plug (35) with the sealing ring (36).

12. Using a puller (02) and a threaded insert (03), remove the pin (37) of the timing chain tensioner lever.

13. Remove the tension lever (38).

14. Remove the timing chain cover mounting bolts (a), (b), (d) and (e).

15. Remove the front crankshaft oil seal (15).

16. Remove the oil pump (25).

17. Remove the bolts (f), (g) and (h) securing the timing chain cover (9).

18. Remove the timing chain cover (9).

Timing chain cover installation details (3 of 3), arrows indicate engine oil application locations

Timing chain cover installation details (3 of 3), arrows indicate engine oil application locations
f, g, h - Bolts; 9 - Timing chain cover; 23, 24 - Sealing rings; 25 - Oil pump; 26 - Oil pump drive chain; 27 - Crankshaft sprocket; 29, 29a - Bushings




Installation



Installation is performed in the reverse order of removal. Wipe the sealing surfaces and lubricate them with sealant 002 989 47 20 10. Replace the sealing rings (23) and (24), lubricate the gaskets with engine oil. Replace the front crankshaft oil seal.
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The article has been verified: Polyakov Zakhar Grigorievich
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S-Class W140 / Petrol engine V8
Next ▶

Removal and installation cylinder heads
Removal and installation the exhaust manifold
Removal and installation the intake manifold
Cylinder Head Covers — Installation Details
Removal and installation the engine
Timing chain replacement
Checking the valve timing
Timing Drive — General Information, Component Maintenance
Removal and installation the valve timing regulator
Removal and installation camshafts
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  • Introduction to guide
  • User manual
  • Maintenance
  • Power unit
  • Engine repair
  • Cooling and heating systems
  • Power and exhaust systems
  • Ignition and control system
  • Charge and launch systems
  • Transmission
  • Automatic gearbox
  • Drive shafts
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  • Front suspension
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  • Introduction to guide
  • Power unit
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  • Power system (carburetor)
  • Fuel injection system
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