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Home >> Fiat >> 1978 >> 128 Base, 2D Sedan >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> 128 & X1/9 4 Cylinder >> Camshaft >> Timing Belt Replacement >> Installation

Timing Belt Replacement: Installation

Install new belt, making sure belt and sprocket teeth engage correctly. Tighten pulley support nut. Recheck timing. Install remaining components.

Fig 1: Front View of Engine Showing Timing Belt Installed
G09334414Courtesy of NOT AVAILABLE


  1. Install timing belt making sure that teeth are properly engaged in sprockets. Start installation of timing belt at crankshaft pulley. Release idler pulley lock nut and retighten after tension is on belt.
    NOTE: Never allow engine to rotate backwards, or slack will develop in belt and belt will jump timing.
  2. Rotate engine one-half turn. Loosen idler pulley lock nut to ensure all slack is removed. Retighten lock nut. Rotate engine until No. 4 cylinder is in firing position (cam lobe up). Install remaining components in reverse of removal order.