Question about 1989 Mercedes-Benz 300-Class
Hi make sure you draw a picture of the way the belt runs around the pulleys because once its off it can be difficult to guess the correct way it goes back on so get a pen and paper and draw all the pulleys and draw the way the belt goes around the pulleys so as when you come to put it back on you know exactly which pulleys it goes over and what way the belt goes around each pulley
Depending on model first remove two(2) piece fan shroud,the tensioner is located between the water pump and power steer pump,between the pump pulleys is a 10mll. socket head bolt,loosen this bolt several turns,the pre-tension bolt is located behind the power steer pump and is a 13mll.socket size,turn the bolt anti-clockwise to release the tension,if you dont have a belt diagram make one now,pull the belt to loosen it and remove from the pulleys,fit the belt per the diagram leaving the alternator pulley to last,pull the belt whilst loosening the pre tensioner until you can fit the belt over the alternator pulley,pre-tension the belt by turning the pre-tensioner bolt clockwise,do not overtighten,retighten 10mll tensioner bolt,start engine,check belt is correctly aligned on pulleys,retension if neccesary,refit shrouds.
let me know how you get on or if you need further assistance ok
Posted on Aug 05, 2010
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Posted on Jan 02, 2017
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