Technical Queries

Why has re-gassing air conditioning become so expensive?


  1. Posted on August 10th, 2018 by Rob Marshall
  2. We have received members comments on how air conditioning regassing has become considerably more expensive, especially during this summer. While you could be sceptical and comment that unscrupulous garage owners have bumped-up their prices during the summer heat, the truth is somewhat different. Saving the planet or an air ‘con’? Air conditioning gas is a […]

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New diesel engine that runs on petrol announced


  1. Posted on July 17th, 2018 by Rob Marshall
  2. With the considerable anti-diesel rhetoric that exists currently, one would think that the world had turned its back on compression-ignition engine technology. That is untrue. While new UK sales have declined, demand for used diesel cars has risen. One of the major issues is that there is no realistic alternative to heavy-oil cars, on the […]

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Dangers of (under) inflation


  1. Posted on July 10th, 2018 by Rob Marshall
  2. While many road safety bodies, including GEM, emphasise the importance of correct tyre pressures, it is worth making additional pressure adjustments during the holiday period, particularly if you are planning long-distance trips.   Relating tyre pressures to weight If your car spends much of its time lightly-loaded, it is likely that your tyre pressures will […]

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Automatic gearboxes – preventative maintenance


  1. Posted on April 26th, 2018 by Rob Marshall
  2. While modern automatic gearboxes have evolved considerably since the 1980s, they still require to be looked after. Following this general advice will help your automatic transmission last for as long as possible. Getting your definitions right The advice given applies to the ‘traditional’ format automatic gearbox, with an epicyclic drivetrain and torque converter clutch. It […]

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Tyre ageing to be researched


  1. Posted on March 28th, 2018 by Rob Marshall
  2. It is a popular question among GEM members – when does a tyre become too old? Sadly, we cannot provide a definitive answer, because it depends on so many variables, including storage and usage conditions. Whenever we have queried premium tyre manufactures about age limits, the answers are, understandably, vague. Research commissioned Yet, the first […]

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Avoiding a keyless entry theft


  1. Posted on January 3rd, 2018 by Rob Marshall
  2. According to Thatcham Research, a flood of thefts has come from criminals that exploit modern keyless entry systems. These are keyfobs that permit car owners to enter and start their cars without having to push a button, or even remove the plastic moulding from their pockets. While these systems offer a convenience to drivers (although […]

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Tyre Safety Month 2017 : correct tyre inflation is vital for safer driving


  1. Posted on October 3rd, 2017 by GEM Motoring Assist
  2. ROAD SAFETY and breakdown recovery provider GEM Motoring Assist is encouraging drivers to ensure they carry out regular checks on their tyres. GEM is supporting Tyre Safety Month, which takes place in October, by reminding motorists that correct tyre pressure is not only vital for safety, but is also the best way to maximise fuel […]

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Timing belt in oil (BIO) overview


  1. Posted on September 25th, 2017 by Rob Marshall
  2. One of the driving forces in modern car development has been to enhance efficiency wherever possible, while reducing tailpipe emissions, including CO2. Some GEM members have questioned if some of these systems just pay lip-service to official emissions and fuel consumption data that have altogether less relevance in the real world. Automatic stop-start is one […]

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‘Clocking’ on the rise.


  1. Posted on September 12th, 2017 by Rob Marshall
  2. To me, ‘mileage correction’ is a rather misleading phrase, because it tries to give something that appears to be inherently immoral an outwardly respectable facade. Yet, I accept that the ability to alter a vehicle’s mileage has a viable place in the arena of honest vehicle repairs. Historically, a car’s total mileage reading was presented […]

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Using the ‘air-con bomb’


  1. Posted on August 18th, 2017 by Rob Marshall
  2. If you are experiencing unpleasant smells, moments after turning on your air conditioning, you may need to set-off a ‘bomb’. Put simply, these are aerosol cans that are activated within the car, which penetrate and disinfect the parts of the ventilation system through which the air flows. This includes, within the heater unit, the external […]

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