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.
Crankcase Ventilation
The system is pressure controlled and completely enclosed.
Crankcase gases flow up to both the valve covers. There is a hose connecting the valve covers. A labyrinth system of plates is installed in the valve covers. The oil in the gases condenses on the plates and drains back to the oil pan.
The ventilation is pressure controlled to retain stable pressure in the crankcase. A pressure regulator is installed on the rear edge of the right valve cover. The gases which are evacuated are led from the regulator through a hose to a connection on the inlet pipe. Coolant is circulated around the connection to prevent freezing.
The pressure in the crankcase is approximately - 0.03 bar.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.