Diesel Engine System Oil Filter


Oil filters are used to remove foreign objects from lubrication oil systems. Removing foreign particles ensures no unnecessary erosion damage occurs to downstream machinery parts, this is particularly important when fine tolerances between the machinery components must be maintained.


How Oil Filters Work

The below video is an extract from our Diesel Engine Fundamentals (Part 1) Online Video Course.

Oil flows into the filter through small holes on the outer perimeter of the filter. The oil then passes through paper pleats. The paper pleats allow the oil to pass through but the paper is too fine for larger particles to pass through. Larger particles are thus retained on the surface of the paper pleat and prevented from flowing to the oil galleries and engine components.


When To Change An Oil Filter

An oil filter becomes dirty over time and the flow rate through the filter reduces (differential pressure across the filter becomes larger). In order to maintain the correct flow rate, the filter should be changed at scheduled intervals. When to replace the filter is usually determined by the number of engine service hours, distance travelled, or, a set time interval such as e.g. 12 months.


3D Model Components

This 3D model shows all major components associated with a typical automotive oil filter, these include:

  • Gasket
  • Inlet Port
  • Drain Back Seal
  • Base Plate
  • Casing/Shell
  • Filter Media


Additional Resources