claim
Back to search

Information on use

Pressure oil filling on reconditioned engines

How do we fill the engines with oil after reconditioning? Why pressure oil filling? How can running-in damage be avoided on reconditioned engines? What must be taken into account before starting new and reconditioned engines? You can find a detailed description here.

SITUATION

After an engine has been completely overhauled, the plain bearings may be damaged immediately during initial startup. The reason: Oil pressure can only be built up by the oil pump once the oil pressure system is filled with oil and vented. If the engine is started in dry state, it may take too long for the oil to reach the bearing positions. The highly stressed plain bearings of the connecting rods in particular suffer from the inadequate oil supply. During the first start phase, the connecting rod bearings are mainly lubricated with the oil applied during mounting. These emergency reserves are used up too quickly, however, and the bearing positions are damaged due to mixed friction and overheating.

REMEDY

To prevent damage during the initial start-up, it is advisable to fill the oil pressure system manually with engine oil before starting up the engine. This ensures that any air is removed from the oil pressure system and ensures that the components work safely from the start. In addition to the plain bearing positions, hydraulic chain tensioners, hydraulic camshaft adjustment, hydraulic tappets and engine components lubricated with engine oil, like turbochargers, fuel feed pumps, fuel injection pumps and vacuum pumps, also benefit from this process.

Fig. 1: Schematic representation of the oil circuit

NOTE

This procedure is generally specified by many renowned engine manufacturers for the initial start-up of new or reconditioned engines.

NEXT STEPS

Fig. 2

1. Using a pressure tank, the oil for the engine is pumped into the engine via a screw connection on the oil pressure system (Fig. 1 and 2). Suitable connection points are the oil channel sealing plugs specified by the engine manufacturer, or the connecting point of the oil pressure switch OPS.


Fig. 3

2. Oil is now pumped into the engine until oil escapes from the oil lubricating points furthest away from the oil pump. These points are usually the rocker arm bearings (Fig. 3) or the bearing positions of camshafts at the top. The maximum permitted oil pressure in engine operation must not be exceeded. During the pressure oil filling, the engine should be turned by hand in the direction of rotation.


3. Ensure that the oil level of the oil filler tank does not fall below the minimum level during filling. If air is sucked in during pressure oil filling and pumped into the oil circuit, the entire process must be repeated.

Keywords :
oil pump , oil consumption
Product group :
Oil supply
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.