Aftermarket October 2022

OCTOBER 2022 AFTERMARKET 41 www.aftermarketonline.net supply chain is better informed over Type Approval legislation and the important role they can play in its enforcement, for the benefit of the entire sector.” To access the technical posters, visit: bmcatalysts.co.uk/downloads/ EGR On the exhaust gas recirculation front, earlier this year NGK introduced a range of EGR valves to its NTK Vehicle Electronics portfolio. NGK Spark Plugs (UK) Marketing Manager Mark Hallam observed: “The valves are equivalent to their OE counterparts with phase one of the launch in March seeing the introduction of 45 references to sit alongside the company’s range of NTK Lambda sensors. Many new models will even be equipped with two EGR types, low pressure and high pressure, which means that the replacement part market for these types of valves is likely to grow, corresponding to the level of demand. “The principal function of the EGR system is to reduce the amount of harmful nitrogen oxides (NOx) that are produced during the combustion process. The higher the oxygen (O2) content is of the charge entering the combustion chamber, the higher the burn temperature. Recirculating some of the exhaust gasses into the inlet side of the engine has the effect of reducing the amount of O2, which lowers combustion temperatures and reduces NOx emissions. Mark added: “A valve is required so there can be a compromise between the reduction of NOx emissions and engine efficiency. Too much exhaust gas in the intake charge when the engine is cold would make combustion very unstable and the engine would not run smoothly. At high engine loads too much exhaust gas in the intake charge would cause a reduction in power output. Diesel engines can suffer with excessive black smoke. Hence the valve needs to be controlled accurately to maintain good drivability throughout all operating conditions.” For more information, visit: www.ngkntk.com/uk Turbocharger installation best practice The exhaust system helps run other elements of the vehicle, including the turbo. Commenting on how to properly install a turbo, Nissens Marketing Manager Jan Zieleskiewicz observed: “Clean the area around the turbo before starting the disassembly and then carefully examine all the parts such as the intercooler, inlet/exhaust manifold, pipes, hoses, ventilation, air filter box, EGR, DPF, CAT, etc., that are in and around it for any faults, damage, leaks and impurities, and place all the screws and bolts into a dedicated box. “Clean these parts as they are removed and if necessary, replace them. If the previous turbo breakdown was caused by seizure of the turbine/compressor wheel or foreign objects inside the turbo, the intercooler should always be replaced. However, always replace the O-rings, gaskets and hose clamps. Prime the turbo’s shaft by injecting new engine oil into the turbo’s oil feed before mounting the oil feed pipe and rotating it ten times. Then measure the oil pressure at the turbocharger and check the oil flow before fitting the oil return. “Once the turbo is in place, start the engine and while it is at idle for a couple of minutes, inspect the entire system. Check that all the turbo connections are leak-proof and inspect any suspicious sounds. Ensure that there isn’t too much back pressure in the exhaust system and naturally repair any detected issues. Connect test equipment and reset the fault before taking the car out for a drive to check if it runs correctly, and with the right boost pressure.” For more information, visit the Nissens Automotive expert knowledge portal: https://support.nissens.com/en/material/self-learning- course-turbocharger-component-installation %$" $ !"#$%& GDI Injector %#% $ # $% Cleaner % $ $ % " $ % # " $ $ # # Email: info@kalimex.co Call: For more information: % .uk Right: Technical poster available for download from BM Catalysts