1. However, this is quieter and the tensioner does not wear greatly. 2. Direct drive eliminates the need for a pulley, belt and belt tensioner . 3. The tensioner is either operated by turning a screw or a manual wheel. 4. An improved belt tensioner was introduced in 2002. 5. A interference design of the engine . 2002 + engines utilized a different mechanical tensioner . 6. Helberg was awarded a patent for an " automatic control cable tensioner ". 7. Increasingly common recent uses may include the tensioner for a variators for variable valve timing systems. 8. When tensioning a head, the tensioning rod closest to the tensioner should be tightened first. 9. The tensioner is either in a lateral position underneath the exhaust or integrated in the clutch cover. 10. It is common to replace the timing belt tensioner at the same time as the belt is replaced.