Belt Tensioner Diagram. Note that the 24l engine had a serpentine belt 7506 inches in length 1906mm and the 25l belt is much shorter at 4717 inches 1196 mm. The central element in this pretensioner is a chamber of combustible gas.
Drive design maintenance manual 77 installation and take up allowance belt pitch length mm installation allowances take up spz mm z spa a spb b spc c 8v d 410 to 530 20 5 530 to 840 25 30 10 850 to 1160 50 15 1170 to 1500 20 1510 to 1830 25 1840 to 2170 30 2180 to 2830. Some pretensioners are built around electric motors or solenoids but the most popular designs today use pyrotechnics to pull in the belt webbing. If routing decal is absent these simple rules may be helpful to the installer.
Most vehicles have a decal to show drive belt routing and it usually shows which pulley is the tensioner and the direction of tensioner movement.
The tensioner should be rebuilt every time that you replace the timing belt. Sep 10 i need. Set the v ribbed belt onto the. If routing decal is absent these simple rules may be helpful to the installer.