Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pressure circulation lubrication
The engine is equipped with pressure circulation lubrication. The oil drawn in by the oil pump via an intake pipe from the oil pan flows through the full-flow oil filter. The oil then enters the main oil gallery, which usually runs in the engine block parallel to the crankshaft. Ducts lead to the main bearings of the crankshaft. The crankshaft and conrod are supplied with oil by the main bearings, as the crankshaft has corresponding bore holes. Part of the oil is branched off the main oil gallery and fed to the cylinder head at the corresponding positions.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.