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 Systems: Description
The 4 cylinder Non-Turbo crankcase ventilation system consists of an oil trap, flame guard, and PCV valve which are located in valve cover, vacuum hose to intake manifold, nipple, and a hose to the air cleaner. The 4 cylinder Turbo system consists of an oil trap, PCV valve, and a vacuum hose to turbo-compressor intake.
The 6 cylinder crankcase ventilation system consists of an oil filter cap with 1 hose to air cleaner and a vacuum hose that decides and goes to right and left banks of the intake manifold. There is a PCV valve on each bank of the intake manifold where the vacuum hose attaches.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.