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.
PCV System Description - Overview (2013-18)
Some of the unburned gases in the combustion chamber will leak past the gap between the pistons and cylinders into the crankcase. The blow-by gases that include the unburned gases are inhaled at the positive crankcase ventilation or PCV valve and are burned. This prevents the blow-by gases from flowing into the atmosphere. In addition, the breather chamber of the cylinder block separates oil from blow-by gas, which prevents the oil from entering the combustion chamber.
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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.