Engine and Transmission

Sensors lead the way in warranty claim


  1. Posted on October 29th, 2018 by Rob Marshall
  2. A report that says sensors have pipped alternators to become a top warranty claim (for those sold by the RAC dealer network) came as little surprise to us, when the news hit GEM’s technical helpdesk. There are several reasons for this, such as virtually everything mechanical being influenced, or controlled, entirely by electronics that depend […]

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Will the new Green E10 petrol cost you dear?


  1. Posted on October 19th, 2018 by Rob Marshall
  2. The government consultation (which lasted for fewer than two months) closed on the 16th September. In it, the Department of Transport (DfT) sought public feedback on whether and how to introduce E10 petrol in the UK, in what way to label the new fuel, plus for how long a continued supply of the ‘traditional’ E5 […]

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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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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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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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Level checks – heed the Max


  1. Posted on August 14th, 2017 by Rob Marshall
  2. While ensuring correct fluid levels is vital for year-round reliability, a useful reminder to help prevent a ruined summer holiday is to make sure that your car is in good health, prior to venturing on a long journey. Yet, while levels should not be permitted to fall below any ‘minimum’ marks, it is essential to […]

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Prolonging diesel injection pump life


  1. Posted on August 4th, 2017 by Rob Marshall
  2. I hope that you would not vote this blog as the most boring topic ever to appear on the Internet but, if you wish to reduce the risk of having to stump-up an eye-watering sum for a new replacement diesel high-pressure pump, you may wish to read on… Even the most disinterested car owner could […]

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Be wary of the killer modifications


  1. Posted on May 19th, 2017 by Rob Marshall
  2. A recent inquest that concluded the accidental deaths of a young couple has highlighted the dangers of adapting (or deactivating) car anti-pollution systems, in a bid to either increase vehicle performance, or reduce repair costs. Last December, the bodies of Tom Putt (20) and Nikki Willis (23) were found inside a Ford Fiesta ST that […]

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Fake car parts situation is getting worse


  1. Posted on May 16th, 2017 by Rob Marshall
  2. It appears as though the fake car parts scandal is worsening, since our last blog on the topic. In a worrying recent development, we have come across an honest motor trader getting caught-out, by receiving counterfeit shock absorbers through his well-established, trusted and reliable parts supplier. Thankfully, the technician noticed that there was a problem […]

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Practical problems of ditching diesel


  1. Posted on April 11th, 2017 by Rob Marshall
  2. Last month, the Transport Secretary, Chris Grayling, advised that drivers should, “Have a long, hard think about diesel.” While he did not think that diesels would disappear completely, his statement advised that city drivers, in particular, should buy a “low-emissions” car. Leaving aside the technical cases in favour of diesel engines and the very high […]

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