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<h2>What does a crankcase breather do?</h2>A crankcase breather, also called a crankcase breather valve or crankcase vent valve, is a component in an engine that helps regulate the pressure and ventilation of the crankcase, which is the area where the engine's pistons move up and down.A crankcase breather valve works by allowing fresh air to enter the engine's crankcase while facilitating the release of gases and vapors. It typically consists of an inlet, a ventilation passage, and an outlet. As the engine runs, blow-by gases and oil vapor accumulate in the crankcase. The crankcase breather draws in fresh air from the environment through its inlet, displacing the accumulated gases and vapors. Any oil or liquid contaminants are separated and collected within the breather. The cleaned gases and vapors then exit the breather through the outlet and are redirected back into the engine's intake system. This process helps regulate crankcase pressure, prevent the buildup of harmful substances, and reduce emissions. By maintaining proper ventilation, the crankcase breather ensures the efficient operation of the engine and contributes to a clean and well-functioning crankcase.<h2>Crankcase breather blocked symptoms</h2>When a crankcase breather becomes blocked or restricted, it can lead to several symptoms and potential issues in the engine:<ol><li>Increased oil consumption: Blockage can lead to higher oil consumption and potential leaks.</li><li>Poor engine performance: Reduced power, rough idling, or hesitation during acceleration.</li><li>Excessive crankcase pressure: Pressure buildup causes oil leaks from various engine components.</li><li>Blue/white smoke from exhaust: Oil enters the combustion chamber, resulting in smoke.</li><li>Engine misfires/rough running: Improper air-fuel mixture leading to misfires and decreased fuel efficiency.</li></ol><h2>FAQs about Crankcase Breather Valve</h2>Question: How often should I inspect or replace the crankcase breather valve?It is recommended to inspect the crankcase breather valve during routine maintenance intervals, typically every 30,000 to 60,000 miles (or as specified by the vehicle manufacturer).Question: How can I test if my crankcase breather valve is functioning properly?One way to test the crankcase breather valve is to remove it from the engine and shake it. If you hear a rattling sound, it indicates that the valve is working correctly. Besides, you can&nbsp;also&nbsp;inspect the valve for any signs of blockage or damage.Question: Can a blocked crankcase breather valve affect fuel efficiency?Yes, a blocked breather valve can disrupt the proper air-fuel mixture in the engine, potentially leading to decreased fuel efficiency. If you notice a sudden decrease in fuel economy, along with other symptoms like rough running, it is advisable to have the breather valve checked.Question: Is it necessary to replace the entire breather assembly, or can individual components be replaced?The breather assembly typically consists of multiple components, including the valve itself and associated hoses. In some cases, only specific components may need replacement, such as a clogged hose or a faulty valve. However, depending on the design and availability of parts, it may be more practical to replace the entire breather assembly for optimal performance.

Crankcase Breather Valve

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Air Filter Box

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Air Flow Sensor

Air Intake Duct

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Air Intake Hose

Air Intake Manifold Actuator Control Solenoid

Air Intake Manifold Flap Adjuster

Air Intake Manifold Runner Control Sensor

Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

Intake Manifold Flap Actuator

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Intercooler

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Oxygen Sensor

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Pressure Sensor

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Throttle Body

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Throttle Position Sensor

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Turbocharger

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Turbocharger Oil Line

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Vacuum Pump

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Air Filters & Intake Systems

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Camshaft Adjuster

Camshaft Adjuster Cover

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Camshaft Timing Gear

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Camshafts

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Engine Valve Cover

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Harmonic Balancer

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Timing Belt Kit

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

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Valve Lifters Tappet

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Cams, Timing & Valvetrain

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Belt Tensioner

Coolant Level Sensor

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Crankcase Breather Hose

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Crankshaft Position Sensor

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Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

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Flywheel

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Oil Cooler

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Oil Cooler Line

Oil Filler Cap

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Oil Filter

Oil Filter Base

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Oil Filter Housing

Oil Filter Housing Cover

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Oil Level Sensor

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Oil Pan

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Oil Pump

Oil Pump Drive Gear Shaft

Oil Pump Pickup Tube

Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

Engine Valve Covers & Ignition Coils Kits

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Glow Plug Relay Module

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Ignition Coil

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Ignition Coils & Spark Plugs Kits

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Ignition Distributor

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Ignition Starter Switch

Ignition Switch Actuator

Knock Detonation Sensor

Relay

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Spark Plug

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Spark Plug Wire

Electronic Control Modules, Ignition & Distributors

Engine Wiring Harness

Intake Manifold Repair Kit

Engine Components & Accessories

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Auxiliary Water Pump

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Expansion Tank

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Expansion Tank Mounting Plate

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Fuel Cooler

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Radiator

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Radiator Hose

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Radiator Support Assembly

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Temperature Sensor

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Turbo Hose

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Water Coolant Pipe

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Water Outlet

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Engine Cooling

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Engine Mount

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Engine Mounts

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Catalytic Converter

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EGR Valve

Emissions Fluid Pump

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Exhaust Fluid Heater

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Exhaust Gas Temperature Sensor

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Exhaust Manifold

Fuel Tank Breather Valve

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Fuel Vapor Leak Detection Pump

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Nitrogen Oxide Sensor

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Secondary Air Injection Check Valve

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Vapor Canister Vent Solenoid

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Exhaust & Emission Systems

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Fuel Filter

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Fuel Injection Control Module

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Fuel Injection Pressure Regulator

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Fuel Injector

Fuel Injector Kit

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Fuel Injector Module Wiring Harness

Fuel Line Kit

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Fuel Pump

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Fuel Sending Unit

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Fuel Tank Filler Neck Pipe

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Fuel Tank Strap

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High Pressure Fuel Pump

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Idle Air Control Valve

Mechanical Fuel Pump

Oil Pressure Relief Valve

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Fuel Systems & Components

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The engine comprises many essential elements such as the lower cylinder block, upper cylinder head(s), and the cooling & lubricating systems. With A-Premium aftermarket engine components, you can expect that your engine deliver years of reliable performance. We offer a diverse selection of engine components from air filters and ignition coils (kits) to fuel pumps to cater to your needs.

2009 Ford F650 Crankcase Breather Valve

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