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.
Description & Operation
A closed type system is used. The system consists of a head cover baffle plate, a regulating orifice, hose connections, and hoses. Blow-by gas suction is controlled by the regulating orifice.
Under normal operating conditions, blow-by gases are drawn from the valve cover into the intake manifold to be burned by the engine. When engine is running at its maximum speed, intake manifold pressure is too low to handle all the blow-by gas.
Some of the gas will be drawn into the air cleaner, through the rear end of the head cover. The regulating orifice, mounted on the intake manifold, regulates blow-by gas flow in response to variations of intake manifold vacuum.
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.
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