Hello I will help you with your question,
Support the engine with a floor jack and a block of wood to protect the oil pan and remove the engine mount. The tensioner is held with a single bolt and a locationg pin. Remove the bolt and when installing the new tensioner be sure the pin is seated in the locating hole
The time to replace the tensioner is 2.1 hours so this is no small feat.
Let me know what further questions you have about this