Published - 2021

Gas springs - additional sales potential in the winter half-year

Tech news

Cold has never been the gas spring's best friend. Low temperatures often cause older gas springs to leak and fully or partially cease to function. Therefore, as an additional sales opportunity for workshops, it is a really good idea to check the function of the gas springs on the cars that find their way to the workshop during the winter half-year.
 
But why is the gas spring particularly affected by cold? The cylinder of the gas spring is filled with gas and a little oil. The pressure in the gas spring decreases the colder it gets - and so does the viscosity of the oil. From summer to winter, this means that there is typically a 10-15% lower pressure/power on a gas spring. 

The reduced power in the winter half-year combined with the pressure drop that follows over time due to wear on the gasket between cylinder and piston means that the gas spring is no longer able to function as it should. This can, for example, be seen by the luggage compartment door or engine bonnet slowly closing, when open. Another sign thereof is having to use more force when opening the luggage compartment door or engine bonnet. The phenomenon is especially prevalent with very cheap gas springs of poor quality. Although gas springs are virtually maintenance-free, we recommend to always keep the gas spring parts free of rust and dirt. This applies particularly to the gas spring piston rod, which in opposite case can lead to damaging the seal on the gas spring. 

At Triscan, which carries one of Europe's largest selections of gas springs and is itself a co-owner of a gas spring factory, special attention is paid to the gas spring's weaknesses. “We only use quality sealings from leading suppliers in our production. In this way, we ensure that a Triscan gas spring has the best conditions so as not to become leaky. But we actually do more than that. We know that many car owners do not get their gas springs cleaned of dirt and rust around the piston. That is why our gas springs are equipped with a special protection - a plastic cover - which partly counteracts the formation of rust in and around the sealing. In this way, cleaning becomes less of a factor,” says Asger Thybo Geertsen, CPO at Triscan. 
 
gasfjeder snit 3D

3D CAD section illustration of cylinder, piston and sealing on a gas spring

 

eksempel plastikkappe

Example of plastic cover mounted on Triscan gas spring


Over time, various new types of gas springs have been developed and Triscan is also involved in this process. Both the so-called coil-over and tension springs used on BMW's 5 Series (E60 and F10) and X5 (E70) can be found in the programme. The same goes for electric gas springs, where the programme has just been extended to as many as 21 references. “In the beginning, as so often before, it was only in the segment of luxury cars that the electric gas springs were to be found. But now the technology has become so mature that they are also to be found in several more popular cars in the middle class. It is e.g. in Audi Q3, BMW X3, Hyundai iX35, Skoda Superb and VW Tiguan”, concludes Asger Thybo Geertsen. 

eksempel elektrisk gasfjeder 
Electric gas spring - BMW X5 Series 

 coil over 8710112016Coil-over gas spring - BMW X5 Series (E70)

 

trækfjeder 8710112015Tension gas spring - BMW 5 Series (E60, F10)


Visible signs of defective gas springs:
•    Defective/broken fittings which are often made of plastic.
•    Oil at and around the assembly of the gas spring cylinder and piston. 

Hidden signs of defective gas springs:
•    Inability to maintain the tailgate or the bonnet in the open position. 
•    Increased use of force required for opening the tailgate or bonnet.

Remember:
•    Always replace gas springs in pairs.
•    At TRISCAN, we have more than 1,700 references within gas springs
•    At TRISCAN, special fittings are part of the delivery