DAYCO SERVICE INFORMATION
GM 1.7 Turbo Diesel Timing SystemOverview Problems in the market persist with the failure of the belt tensioner on the 1.7-litre turbo diesel engine used in many Vauxhall/Opel and Isuzu vehicles following the prescribed belt and tensioner change specified by the vehicle’s official service schedule. The issue is further complicated as there are at least ten versions of this unit, each with its own design variant. However, the cause of the most common failure occurs because the belt is over tensioned, which because of its design is very easy for the technician installing the belt to do.