First aftermarket steel pistons for passenger cars

Kolbenschmidt GmbH - part of Rheinmetall Automotive - is a pioneer in the development of steel pistons for use in passenger car engines - a technology that has become well established in modern engine manufacture. A steel piston has numerous advantages over an aluminium piston, including a reduction in friction, weight and fuel consumption. MS Motorservice International GmbH is now bringing this technology from its sister company to the aftermarket sector.

Beginning in the middle of the 2010s, there has been a growing trend towards the utilisation of steel pistons in passenger car engines. Many leading car manufacturers now use the innovation. Ultimately, increasing pressures and high temperatures mean that modern engines have to meet tougher requirements than ever before. These requirements can be met more reliably by a smaller and lighter steel piston. In response to this development, Motorservice now offers aftermarket steel pistons for the Mercedes-Benz OM 642.855, OM 642.873, OM 654.920 and OM 656.929 engines - spare parts in OEM quality.

Advantages of steel pistons
The constantly increasing use of steel pistons can be attributed to a number of advantages over aluminium pistons: With steel pistons, combustion pressures of well over 200 bar and peak temperatures of over 400 °C are possible. This enables a greater power density to be achieved, allowing further downsizing of the engines. In addition, the thermal expansion of steel is significantly less than that of aluminium: A steel piston is closer to the optimum shape even when cold. This means that the necessary clearance for movement can be made significantly smaller and the interacting sliding parts can be coordinated better with one another to reduce friction. The surface coatings developed by Kolbenschmidt especially for steel pistons amplify this effect, bringing further improvements in even running and cold running properties of the steel pistons.

Smaller, lighter, more efficient
The smaller clearance and the narrower gap dimensions also reduce oil consumption and blow-by gases. Operational safety is also increased, both in the cold start phase and at maximum load in the higher temperature range. The higher strength and temperature resistance of steel allow very thin-walled designs. This enables steel pistons that are lighter than aluminium pistons to be constructed. The compression height of the piston and its total length can be reduced. The new designs can bring savings of around 30 percent compared to aluminium. The larger piston pin diameter than with aluminium enables higher force transmission to be achieved. Ultimately, the use of steel pistons allows a smaller, lighter and more efficient design of the entire engine.

About Motorservice
As a sales organisation for Rheinmetall Automotive's aftermarket activities, Motorservice acquires a large proportion of its range internally from within the group, including the subsidiaries Kolbenschmidt and Pierburg. The internationally active spare parts specialist also has the know-how of a large international automotive supplier. Customers therefore benefit from products in OE quality.

Don't want to miss any news?

Use of cookies and data protection

Motorservice Group uses cookies saved to your device in order to optimize and continuously improve its websites, as well as for statistical purposes. Further information on our use of cookies can be found here, together with our publication details and data protection notice.

By clicking on “OK” you confirm that you have taken note of the information on cookies, the data protection declaration and the publication details. You can also change your cookie settings for this website at any time.

Privacy settings

We place great importance on transparent information relating to all aspects of data protection. Our website contains detailed information on the settings you can select and what effect these settings have. You can change your selected settings at any time. Regardless of the selection you choose, we will not draw any conclusions regarding you as a person (except where you have explicitly entered your details). For information on deleting the cookies, please see the help function in your browser. You can find out more in the data protection declaration.

Change your privacy settings by clicking on the corresponding buttons

Necessary

Cookies essential for the system ensure that the website works correctly. Without these cookies, malfunctions or error messages may occur.

This website will:

  • Store cookies required by the system
  • Store the settings you make on this website

This site wil never do the following without your agreement:

  • Store your settings, such as the language selection or cookie banner, so that you do not have to repeat them in the future.
  • Evaluate visits anonymously and draw conclusions to help us to optimize our website.
  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Convenience

These cookies make the website easier to use and save settings, for example, so that you do not have to repeat them every time you visit the site.

This website will:

  • Store cookies required by the system
  • Store your settings, such as the language selection or cookie banner, so that you do not have to repeat them in the future.

This site wil never do the following without your agreement:

  • Evaluate visits anonymously and draw conclusions to help us to optimize our website.
  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Statistics

Statistics cookies enable us to evaluate the usage behaviour on the website anonymously – without enabling any conclusions to be drawn about you as a person. This enables us to measure the performance of the website and to improve it continuously to offer a better user experience.

This website will:

  • Store cookies required by the system
  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)
  • Evaluate visits anonymously and draw conclusions to help us to optimize our website.

This site wil never do the following without your agreement:

  • Draw conclusions regarding you as a person (except where you have explicitly entered your details, e.g. in contact forms)

Of course, we will always respect the do-not-track (DNT) setting in your browser. In this case, no tracking cookies are set and no tracking functions are loaded.