Timing Chain Tensioner 4792443AB Fit For Chrysler Dodge 00-08 2.7L 167CID DOHC The timing chain tensioner maintains the appropriate tension in the timing chain. The tensioner can use spring tension or hydraulic pressure to properly tension the chain. Symptoms of a bad or failing timing chain tensioner include: engine may stall or run rough, noise in the front of the engine (a rattle or rumble, associated with engine speed), or check engine light may illuminate and set misfire, camshaft sensor, and crankshaft sensor codes. When replacing a timing chain tensioner, it is highly recommended to replace the whole timing chain set, which includes all of the chains, the gear set, the tensioner(s), and the guides. Interchange Part Number4792443AB Fits Following Models: FOR CHRYSLER 300 2005-2007 2.7L 2700CC 167CID V6 DOHC, (24 VALVE), VIN CODE 'R'