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...AC Servicing - system flushing To perform properly, the AC system must be clinically clean inside the loop. Refrigerant and lubricant working in high temperatures and pressures, as well as components with precise mechanisms (compressor, expansion devices), require cleanliness for optima...

...Common turbo problems - REA/SREA failure modes Rotary Electronic Actuators (REA) or Simple Rotary Electronic Actuators (SREA) are fitted to many variable geometry turbos and control the variable vane movement. This TechTip from Melett explores the benefits of the these actuators, and poss...

...Opel Astra-K: Brakes binding Question: We are having difficulty finding the cause of a brake binding fault on a 2015 Opel Astra. The brakes are being lightly applied without the pedal being depressed. We have checked the brake calipers and they are not sticking. Can you assist us? Answ...

...THROTTLE VALVES AND REGULATING THROTTLESWHAT IS THE DIFFERENCE?In a petrol engine, the throttle valve impacts the quantity of air that is drawn in. More or less fresh air or air-fuel mixture flows into the cylinder according to how open the valve is. The position of the throttle valve dire...

...Components of a typical DPF systems with Selective Catalytic Reduction (SCR) After Treatment Devices: Systems for the removal of pollutants from exhaust gases once they have left the combustion chamber, such as Diesel Particulate Filters (DPF's) and Catalytic Converters. CO2 - Carbon...

...Volkswagen Golf - Antiroll bar knock Removing the drop link, allows more movement and easier fitting of the new D bushes The source of a very loud knocking noise can often be a surprisingly small bush. The humble D bushes on the antiroll bar often fail, allowing a tiny contact point betw...

...Choosing an Oscilloscope Have you ever looked at an oscilloscope and been bewildered by the different specifications? Sampling, Bandwidth, Differential or Single Ended, Resolution, Input Voltage, and the list goes on. Ryan's Automotive's Seamus Ryan explains some of the basic terminology...

...INA Belt Academy VW Scirocco 2.0TDi This month, REPXPERT's Alistair Mason replaced the timing belt and water pump on a 2011 Volkswagen Scirocco. The car was fitted with a 2.0 TDi common rail engine (engine code CFHC), had covered slightly more than 70,000 miles and was replaced due to adv...

...Clutch component failure diagnosis part 3 Despite the complex nature of the modern clutch system, many technicians remain under the misapprehension that clutch replacement is a simple and straightforward affair. However, with clutch replacement now often taking several hours, it's impera...

...A recent call to the Helpline involved a Ford Mondeo misfire. The 2007 Mondeo 1.8 TDCi had a misfire on cylinder 1, with a code present for Injector circuit failure. On investigation, the injector circuit was shorted within the injector. A new injector was sourced from a local supplier and...



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