Engine belt: Difference between revisions
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|{{#ev:youtube|https://youtu.be/ | |{{#ev:youtube|https://youtu.be/Dh8QXkzLvlY|320|center|W220 Tensioner Idler Pulley DIY (By Masood)|frame}} | ||
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Revision as of 00:39, 2 February 2021
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Description
The Poly-V-belt drive (commonly known as the Serpentine Belt) drives engine components (alternator, AC compressor, etc.) from the engine.
Layout Diagrams
Crankshaft turns clockwise.
S350/S430/S500
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Length: 2380mm |
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6-groove single-belt drive, with AC compressor
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Part no:
- A0119979792
- Bosch 1987946046 (length 2390mm)
- Continental ctam 6PK2390 (length 2390mm)
S55 AMG
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The S 55 AMG has two poly-V-belts (belt one shown in purple/belt two shown in black).
Length of belt one: 1289 mm Length of belt two: 2462 mm |
S600
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Length: 2335 mm |
Replacing belt
To remove tension from idler pulley, locate 17mm tensioner bolt located on tensioner bracket (see photo below). Belt obstructs the view so it has to be found by feel. After locating 17mm bolt, push down the bar counter-clockwise (see photo below). When putting the belt back on, it is easier to leave the last part of the belt to slide over the water pump pulley as it has no lip or grooves.
See photo DIY here (S350/S430/S500): http://www.benzworld.org/forums/w220-s-class/1582489-drive-belt-idler-change-photo-diy.html
Replacing Tensioning Device (Tensioner Pulley)
Complete DIY Video
Replacing Guide Pulley (Idler Pulley)
Complete DIY Video