October 2021

Above: REPXPERT demonstrates a timing system C ommenting on Dayco’s ongoing contribution to timing systems, Dayco UK National Sales Manager Steve Carolan said: “The Dayco High Tenacity (HT) or white belt with its PTFE film on its inner teeth and fibreglass core has become the mainstay timing belt for many engine variants used for multiple applications by numerous VMs. Dayco HK belts, originally designed for the requirements of specific Peugeot/Citroën applications, encompass the highest level of technological development and feature a tooth lining fabric and weave that incorporates aramid fibres. This combination achieves extremely high wear performance and greater adaptability to tooth geometry, which makes them particularly effective for high-stress transmission systems.” Steve continued: “Other notable solutions include the belt-in-oil (BIO), a technology that Dayco originally developed to drive the high-pressure fuel injection pump for Ford’s 1.8-litre Lynx engine, but which has subsequently 42 AFTERMARKET OCTOBER 2021 TIMING SYSTEMS www.aftermarketonline.net With engines more precise than ever, making sure that timing systems are properly serviced and managed is vital THE PERSISTENCE OF TIMING SYSTEMS been used in several other application, where space is of particular concern, the company has produced a double- sided timing belt. Another innovative development is the Dayco belt-start generator (BSG) 48 V, a Stop/Start hybrid engine system designed to enable torque to be transmitted in different directions. The BSG is an unorthodox alternator system that, as well as charging the battery when needed, provides engine starting and braking energy regeneration through the alternator, via the auxiliary belt. The Dayco Poly-V belt for this system, which has a white, high-strength fabric coating the rib side, is particularly durable and designed to operate in winter temperatures of minus 40 º C and then be subjected up to 90 º C within the engine department.” Best practice On tips for techs, Steve observed: “There are numerous tips that Dayco recommends technicians bear in mind to promote best practice when replacing primary and auxiliary drive components, amongst others.”