Engine and Transmission

Diesel Particulate Filters


  1. Posted on November 29th, 2020 by GEM Motoring Assist
  2. Few recent technological developments have caused as much angst among motorists, as diesel particulate filters have, but Rob Marshall advises that they are reliable, provided the car is driven appropriately. Thirty decades of diesel engine development has seen them transform from being sluggish and smoky to peppy and polished. While DERV-powered cars have the attraction […]

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The behind the scenes damage that floods wreak upon your car


  1. Posted on November 27th, 2020 by Rob Marshall
  2. While many of us escaped the recent floods, some parts of the UK experienced torrential downpours and it is certain that most of us will be confronted by flooded roads at some point between now and next spring.   While there are many sound safety reasons for not entering deep water, such as the danger […]

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Will the new Green E10 petrol cost you dear?


  1. Posted on October 19th, 2020 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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Timing belt in oil (BIO) overview


  1. Posted on September 25th, 2020 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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Diesel Particulate Filter introduced for petrols


  1. Posted on August 24th, 2020 by Rob Marshall
  2. Despite the heavy criticisms that have been directed at diesel engines in the past few years, the fuel still offers advantages. Recently, I liaised with a committee that influences the UK government’s air quality policies, which recommends the diesel scrappage scheme (of which I do not approve, as written here). I queried, if people scrap […]

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Spark plug upgrades


  1. Posted on August 16th, 2020 by Rob Marshall
  2. You can spend hundreds of pounds on aftermarket bolt-on products that claim to improve your fuel consumption – some work, others are simply gimmicks. Even so, fitting quality replacement parts can have a greater relevance. The spark plug has a very hard life. It must contain forces that equate to fifty times that of gravity, […]

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Level checks – heed the Max


  1. Posted on August 14th, 2020 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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Save money and check oil before going on holiday


  1. Posted on August 6th, 2020 by Rob Marshall
  2. Contrary to popular belief, all engines consume oil, even when in good condition; the rate at which they do so varies, however. The result is that the oil level drops within the sump. Yet, providing that it does not fall below the ‘minimum’ mark on the dipstick, engine damage is unlikely to occur. Not every […]

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The perils of cheap ignition coils


  1. Posted on August 5th, 2020 by Rob Marshall
  2. Ignition coils have been crucial to the petrol engine, even before one was used to power a horseless carriage and are still vital today. Their role is to provide a high voltage spark that is used to jump across a gap on a spark plug, to ignite the petrol and air mixture. Without a decent […]

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Prolonging diesel injection pump life


  1. Posted on August 4th, 2020 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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