Z16XER Timing Belt Replacement - Full Step-by-Step Guide. • In this detailed, step-by-step video, we perform a complete timing belt replacement on an Opel Astra H equipped with the 1.6-liter Z16XER gasoline engine, which was installed on this model from 2006 to 2012. • During the service, we replace the entire timing belt kit: • the timing belt, • the tensioner pulley, • the idler pulley, • and the water pump - even though it is not part of the timing belt drive, it is highly recommended to repl