Engine
Oil Filter
The oil filter removes particles and sludge from the engine oil.
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Combustion flow
Interactive — tap a partTap a part to see how it fits in the system.
What it does
- Filters oil continuously while the engine runs
- Traps wear particles and soot
- Has an anti-drain-back valve to keep oil ready
When it fails
- Oil leak at the filter
- Filter loose or crushed (bad tool use)
- Low oil pressure from a clogged filter
How to diagnose
- Check the filter seal for leaks
- Change at every oil service
Maintenance
- Use a quality filter of the correct spec
- Hand-tighten + 3/4 turn, never crush
- Change with every oil change
Use the diagnosis order. When a part fails, confirm each hypothesis with measurements before replacing anything — codes and symptoms overlap.
Related part
Piston & Rings
Pistons convert combustion pressure into linear motion that the crankshaft turns into rotation.