Spectra5. An oil pressurized Tensioner that keeps the Chain that runs from the crankshaft to camshaft or the Chain that runs from camshaft to camshaft, from becoming loose and jumping a tooth or more causing Engine damage or out of sync crankshaft to camshaft Timing. Cam To Cam. Engine Timing Belt Tensioner Pulley. From 01/04/2005. From 09/06/2004. From 11/01/2002. To 01/04/2005. To 09/06/2004. Belt Auto. Guide. Tension Pulley.