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Cars & Motorcycles
Car Mechanics

Car Mechanics November 2020

Car Mechanics is the UK's only car magazine with essential advice on maintaining and repairing popular makes and models. It’s an invaluable motoring resource that appeals to both the DIY car enthusiast and the more experienced motor trade professional. Car Mechanics has helped save money for our readers every month since 1958. Each issue includes a wide range of in-depth features written in a clear, straightforward manner: • Readers’ motoring-related problems answered for FREE • Real-life motoring dilemmas from our man in the garage trade • Electronic diagnostics delves inside a different modern vehicle each month to explain its management system • Survival Guide looks at new and used component prices for a particular vehicle • Used Car Focus is an in-depth buying guide on a specific make and model • Service Bay covers a full service with close-up images and comprehensive descriptions • Project cars are a major part of the structure of the magazine as we buy, fix and sell different vehicles over a period of months So if you're into saving money and being a home technician, Car Mechanics will help you out - guaranteed!

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Country:
United Kingdom
Language:
English
Publisher:
Kelsey Publishing Group
Frequency:
Monthly

in this issue

2 min.
air quality trial

Email martyn.knowles@kelsey.co.uk Follow us on Facebook @ Car Mechanics Something you may not be aware of is that Highways England are about to trial 60mph speed limits on various sections of motorway across England. Not only that, the speed limits will be operational 24 hours a day. Why? Well, they are investigating the effects that different speeds and driving styles have on vehicle emissions. The trial sections aren’t that long in distance (one or two junctions in length), but it is hoped to test whether reducing the speed limit reduces NO2 levels. The proposed speed restrictions will be at these locations: M6 junctions 6 to 7 Witton M1 junctions 34 to 33 Rotherham M602 junctions 1 to 3 Eccles M5 junctions 1 to 2 Oldbury These locations were identified where levels of NO2 exceed the legal limits. These 60mph limits…

2 min.
saab saga

We decided on a Saab 9-3 for our next project car - Saab’s are great cars I believe, with a loyal following - they are slightly quirky - which is a good thing. With the last cars sold in 2011/12, parts supply still seems to be solid as far as I can tell. I set about finding one on my usual BCA app. Time was pressing on and as we required a diesel model, I was hoping to find one ‘down south’ to then travel north to Sheffield for a hand-over with Andrew Everett (and take pictures, etc). One such 60-plate 9-3 Sportwagon was listed in a lovely light blue hue. Only four images were visible for some reason, but you could see damage on the offside rear. However, as this…

1 min.
new magazine

Launching next month is a new title in association with Car Mechanics. Former CM Editor, Peter Simpson will be the Editor of our new exciting magazine called Bargain Cars. As the name suggests, the publication will be full of great cars to buy now - covering all market sectors, in all price brackets. For the first issue, which is on-sale on November 20,2020 (same day as CM publishes), the main feature car is the Jaguar XF. There’s also a full buying guide on the Land Rover Freelander, £3000 estate cars, Mazda MX-5 at rock bottom prices - plus a BMW E39 road test. To find out more, to order a copy or subscribe, visit shop.kelsey.co.uk/BC20 or see the advert on page 39.…

22 min.
emissions

Despite being a great liberator, the motorcar is also a serial polluter. Whether powered by internal combustion (ICE), or electric, the automobile has a negative environmental impact. As the majority of cars on our roads are ICE-powered, this article focuses on petrol and diesel tailpipe emissions of production cars, while providing an overview of the latest developments. What do engines burn? While ICEs can combust alternative fuels, petrol and diesel are a complex mix of chemicals, originating from not only crude oil but also bio-fuels. British diesel may contain up to 7% bio-diesel (hence the B7 pump labelling), while petrol can contain up to 5% bio-ethanol (E5), a percentage mooted to double at some point within the next twelve months. Added to this base fuel are additive packs, which differ between individual…

2 min.
emissions – where politics & engineering collide

A car manufacturer tunes engines to optimise cost, power, reliability, maintenance schedules and longevity, while meeting Whole Vehicle Type Approval targets. As emissions are set by legislators, perhaps it became inevitable that motor manufacturers and politicians became ever-closer. Post-’Dieselgate’, some quarters argued that the relationship had become too cosy. Since the late 1990s, lawmakers decided to focus on carbon dioxide (CO2 – often called ‘carbon’, which is an inaccurate and misleading description) as a means to levy taxes. For the UK market, manufacturers scrambled to get their CO2 figures as low as they could to reduce the car owner’s tax burden, such as Vehicle Excise Duty rates. This policy advantaged diesel engines, because of their greater fuel efficiency and resultant lower CO2 advantages. Naturally, car owners and fleets rejoiced in this…

2 min.
which main gases comes out of your exhaust?

Carbon Dioxide (CO2) Is a non- poisonous greenhouse gas. Unlike many other tailpipe fumes, it is related directly to fuel consumption. Interestingly, burning more fuel (and increasing CO2 emissions) can reduce other poisonous gases. It is not assessed at MOT Test time but it is measured for Whole Vehicle Type Approval. Carbon monoxide (CO) is a highly poisonous and odourless gas, caused by incomplete combustion. In petrol engines, excessive CO might be caused by the mixture being ignited but not burning completely. Diesel ICEs tend to produce less CO than petrols, because the combustion tends to take place with excess oxygen, which explains why diesel CO is not considered at MOT Test time. Hydrocarbons (HC) While excessive HC can have the same causes as high CO, it tends to be caused by…