Complete Timing Belt Replacement Tutorial | Ford Focus 1.5 TDCi Diesel. • Today we’re working on a 2015 Ford Focus with the 1.5 TDCi diesel engine (code AED). In this video, we perform a complete timing belt drive replacement: installing a new toothed belt, water pump, as well as both the idler and tensioner pulleys. • The video shows the entire process step by step: removing the old belt, dismantling the pulleys and water pump, installing the new components, and correctly tensioning the belt. E