190E 23 L4-23L (102985) (1987) Drive Belt Tensioner (Page 2832)
Drive Belt Tensioner: Service and Repair
NOTE: The belt tensioning device has been modified during production, tensioner version may vary from one vehicle to another. Early engines may
be retrofit with later tensioners but requires additional parts.
PROCEDURE
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Remove Poly V-Belt.
On Tensioning Devices Without Shock Absorber
NOTE: The 1st design of the tensioning device was without a shock absorber.
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Unbolt fixing bolt (25).
^
Tightening torque:
With 19mm hex head 75 Nm (55 ft lbs).
With 17mm hex head 80 Nm (59 ft lbs).
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Remove belt tensioner.
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Remove sealing cover (5).
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Unbolt hexagon socket screw (4) and remove idler pulley.
^
Tightening torque: 25 Nm (18.5 ft lbs).
On Tensioning Devices With Lower Shock Absorber