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Materials & Engineering

 

Safety critical tightening torques for repairers from Ezi-Methods

By Andrew Marsh, 01.11.13
News Articleed in: Materials & Engineering | Public
Tightening torque mechanism
There are safety critical tightening torques all over a vehicle especially in the area of suspension, steering and brakes. It is very difficult to find data which gives those torques, or if the fixing is not to be re-used. The illustration above shows how as the fastener is tightened the clamping force is developed between ...

Chevrolet Cruze engine sensors damaged by body welding repairs

By Andrew Marsh, 10.08.13
News Articleed in: Materials & Engineering | Public
Chevrolet Cruze 1.4l VVT turbo petrol engine
GM issued a new instruction via the Holden division for the Holden / Chevrolet Cruze. It would suggest that errors have occurred on vehicles which were repaired in that the cam position sensor was magnetised, so rendering it ineffective. There are at least two Hall effect sensors on an engine – one to measure the ...

Is the collision repair business affected by vehicle manufacturer branding? Oh yes!

By Andrew Marsh, 07.08.13
News Articleed in: Materials & Engineering | New Model Information | Public | Technology Trends
BMW i3 BIW and battery pack front three quarter
BMW so far has not created a single dud brand (Maybach, anyone?) has spent three years positioning its latest creation (‘I’ brand) and is now about to start selling vehicles. The BMW i3 represents a new vehicle from the ground up as well as a new company division. The first product will be joined by ...

Debate about air conditioning refrigerant R1234yf heats up

By Andrew Marsh, 18.02.13
News Articleed in: Materials & Engineering | Public
Debate about air conditioning refrigerant R1234yf heats up
The latest refrigerant R1234yf is deigned to significantly reduce the global warming potential of refrigerant gas compared to the current industry standard, R134a. This is the main drive to adoption of this refrigerant, which has the advantage of using similar system materials (pipes, hoses, sealing rings) to R134a system, whereas the EU proposal of CO2 ...

Part numbers, the core meaning of life for repairers – Part 1

By Jack Regan, 16.08.12
News Articleed in: Materials & Engineering | Public | Update
Volkswagen Golf II parts laid out
Every single vehicle built in the world has a record of the major building blocks that went into its build (engine, transmission, body style, trim pack, electrical systems, LHD or RHD and so on…). That data is linked directly to the Vehicle Identification Number (VIN) and is the core data that the vehicle manufacturer aftermarket ...

Part numbers, the core meaning of life for repairers – Part 2

By Jack Regan,
News Articleed in: Materials & Engineering | Public | Update
Volkswagen Golf II parts laid out
The Ford system has had to adapt for items not thought of when Model T existed – so electronic fuel injection and (now) engine management lives under the master part number for carburettor. Similarly electronic stability control lives under the brake system master part number. Aside from this adaption, each part number has three elements ...

AC refrigerant – what next and when?

By Andrew Marsh, 26.03.12
News Articleed in: Materials & Engineering | Public
Volkswagen NSF front end module
After nearly two decades, the air conditioning system refrigerant R134a is being phased out. The issue was that should any refrigerant escape into the atmosphere, it remained intact for 13 years before breaking down into its less harmful components to the atmosphere. Given that air conditioning has become almost standard equipment on new cars, it ...

AC refrigerant – what next and when? Part 1

By Andrew Marsh,
News Articleed in: Materials & Engineering
BMW 7 series dual AC system 2002
From the start of 2011 there was quite a fuss about getting training for F gas handling as well as the change-over to a new type of refrigerant – R1234yf. There was global recognition that R134a represented an unacceptable risk as a green-house gas, even though it was introduced to address a major risk to ...

AC refrigerant – what next and when? Part 2

By Andrew Marsh,
News Articleed in: Materials & Engineering
AC charge stations
There are many questions about the change over from R134a to R1234yf: When does the use of R134a become ‘illegal’? The Directive 2006/40/EC set out a time table for elimination of R134a. 1st January 2007 – type approval not granted to vehicles with AC systems carrying refrigerant with a GWP greater than 150 (R134a has ...

Carbon fibre reinforced plastics – going mainstream

By Andrew Marsh, 16.03.12
News Articleed in: Materials & Engineering | Public
McLaren MP4 12C platform with F1 and MP4 F1 tubs
For many years fibre reinforced plastics have promised much but only made selective in roads to the automotive mass market. Fibres chopped into relatively short elements and mixed with polymers have been used for some decades for cooling fan shrouds / cowls, front end modules and exterior body panels. Already the price of pre-impregnated carbon ...
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