PCV & Breather Components
- Genuine®PCV Valve GrommetPCV Valve Grommet by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium materials using state-of-the-art...Made with precision and quality in mindDesigned to meet your specific needs$1.19 - $35.83
- Mopar®PCV Valve HosePCV Valve Hose by Mopar®. Keep your vehicle safe for the environment with this high-quality product from Mopar. Made from premium materials with tight tolerances to your original part, this product will help you restore the efficiency...Built to restore your emission control systemDesigned to fit your vehicle specifications$1.11 - $246.16
- Dorman®HELP™ PCV Valve HoseHELP™ PCV Valve Hose by Dorman®. Proper crankcase ventilation is key to smooth performance and engine longevity. Made from quality materials to resist cracking and brittleness, this PCV hose replaces a worn or leaking original...Ideal replacement - this PCV tubing replaces the original hose on specified vehicle years, makes and modelsDurable materials - this PCV hose is designed to withstand exposure to extreme temperatures and oil vapors to resist cracking and leaking$3.97 - $60.29
- Dorman®HELP™ PCV Valve ElbowHELP™ PCV Valve Elbow by Dorman®. This PCV valve elbow is designed to match the fit and function of the original elbow on specified vehicles, and is engineered for durability and reliable performance.Direct replacement - this PCV valve elbow is designed to match the fit and function of the original elbow on specified vehiclesRestores functionality - reliable replacement for an original elbow that is leaking or has failed due to heat and fatigue$3.54 - $13.98
- ACDelco®Genuine GM Parts™ PCV Valve Hose AdapterGenuine GM Parts™ PCV Valve Hose Adapter by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$14.92 - $123.63
- Standard®TechSmart™ Engine Crankcase Breather HoseTechSmart Engine Crankcase Breather Hose by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity...Made with precision and quality in mindDesigned to meet your specific needs$5.82 - $129.16
- Dorman®PCV Valve HosePCV Valve Hose by Dorman®. PCV Hoses allows crankcase pressure to escape the engine in a controlled manner. Plus, now with Dorman's PCV Valve Hoses you can replace just the hose, without the expense and hassle of installing a complete...Constructed of high quality materials for long lasting useDirect replacement for a proper fit every time$10.57 - $50.72
- ACDelco®Genuine GM Parts™ PCV Valve OrificeGenuine GM Parts™ PCV Valve Orifice by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$10.91 - $12.65
- Dorman®OE Solutions™ PCV Valve DiaphragmOE Solutions™ PCV Valve Diaphragm by Dorman®. This PCV valve diaphragm is designed to match the fit and function of the original diaphragm on specified vehicles, and is engineered for durability and reliable performance.Direct replacement for a proper fitA necessary replacement item for passing inspection in certain states$20.88 - $29.58
- Genuine®PCV HosePCV Hose by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium materials using state-of-the-art manufacturing...Made with precision and quality in mindDesigned to meet your specific needs$9.88 - $97.11
- Gates®PCV Valve HosePCV Valve Hose by Gates®. Emission Hose is constructed from high quality materials for durability and maximum service life. Replacement hose effectively restores the emission system to proper operation and performance.Meets SAE J30R7 specificationsResistant to fuel vapors and oil$0.17 - $178.71
- Professional Parts Sweden®Oil Trap KitOil Trap Kit by Professional Parts Sweden®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Expected to provide seamless service for yearsDesigned with breakthrough technology$58.66 - $76.64
- Dorman®HELP™ Breather HoseHELP™ Breather Hose by Dorman®. This engine crankcase breather hose is designed to match the fit and function of the original hose on specified vehicles, and is engineered for durability and reliable performance.Direct replacement - this engine crankcase breather hose is designed to match the fit and function of the original hose on specified vehicleRestores functionality - reliable replacement for an original hose that has failed due to pressure, heat and cracking$4.64 - $31.60
- Standard®PCV Valve GrommetPCV Valve Grommet (GV5) by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all channels...Made with precision and quality in mindDesigned to meet your specific needs$1.99 - $6.51
- Genuine®Breather O-RingBreather O-Ring by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium materials using state-of-the-art...Made with precision and quality in mindDesigned to meet your specific needs$3.25 - $18.26
- Original Equipment®Breather HoseBreather Hose by Original Equipment®. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle's emissions control system is in need of repair, but before you waste your time and gas running out to the...Perfect replacement for your damaged or worn out original partMade using high-grade materials for long-lasting dependability$7.51 - $271.28
- SKP®PCV Valve HosePCV Valve Hose by SKP®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials...High quality at an affordable priceExpertly made from premium materials$4.32 - $129.29
- Dorman®HELP™ PCV Valve GrommetHELP™ PCV Valve Grommet by Dorman®. This PCV valve grommet is designed to match the fit and function of the original grommet on specified vehicles, and is engineered for durability and reliable performance.Direct replacement - this PCV valve grommet is designed to match the fit and function of the original grommet on specified vehiclesRestores functionality - this grommet is made to fit and fully restore part functionality after the original grommet fails$1.96 - $7.08
- Dorman®OE Solutions™ PCV Valve TubeOE Solutions™ PCV Valve Tube by Dorman®. Proper crankcase ventilation is key to smooth performance and engine longevity. Made from quality materials to resist cracking and brittleness, this PCV hose replaces a worn or leaking original...Ideal replacement - this PCV tubing replaces the original tubing on specified vehicle years, makes and modelsDurable materials - this PCV tubing is designed to withstand exposure to extreme temperatures and oil vapors to resist cracking and leaking$27.23 - $38.69
- ACDelco®Genuine GM Parts™ PCV Valve TubeGenuine GM Parts™ PCV Valve Tube by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$11.48 - $69.04
- Genuine®Breather ConnectorBreather Connector by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium materials using state-of-the-art...Made with precision and quality in mindDesigned to meet your specific needs$9.90 - $43.89
- Genuine®Crankcase Breather ConnectorCrankcase Breather Connector by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium materials using...Made with precision and quality in mindDesigned to meet your specific needs$8.31 - $118.92
- Mopar®Engine Oil Separator HoseEngine Oil Separator Hose by Mopar®. Want your prized possession to look and perform the way it was designed to? Then top-of-the-line Mopar automotive parts and accessories are for you. Made using the latest manufacturing technology to...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$19.05 - $441.08
- Motorcraft®PCV Valve Hose KitPCV Valve Hose Kit by Motorcraft®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...Built to strict Ford Motor Company specificationsRecommended by Ford Motor Company$33.07 - $117.58
- SKP®Engine Crankcase Breather HoseEngine Crankcase Breather Hose by SKP®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...High quality at an affordable priceExpertly made from premium materials$5.92 - $115.30
- URO Parts®Breather HoseBreather Hose by URO Parts®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver...Made with precision and quality in mindDesigned to meet your specific needs$1.01 - $262.56
- Autotecnica®PCV Valve HosePCV Valve Hose by Autotecnica®. This superior part by Autotecnica is a great alternative solution to the costly factory equipment that will help you restore smooth and efficient operation of your vehicle. Thoroughly designed and...Designed to replace your worn out factory emission partOptimizes engine cooling performance$12.16 - $27.43
- Vaico®Crankcase Breather HoseCrankcase Breather Hose by Vaico®. From breather tube to breather tube to valve cover. Original equipment manufacturer quality. Quality results from the consistent pursuit of a customer-focused strategy. Clients wishes are in the center...Designed to provide long-lasting service lifeMade utilizing state-of-the-art equipment$2.42 - $192.15
- Dorman®HELP™ PCV ConnectorHELP™ PCV Connector by Dorman®. This engine crankcase breather connector is designed to match the appearance and function of the original hardware on specified applications. Made of quality materials, it is engineered for reliable...Direct replacement - this engine crankcase breather connector matches the appearance and function of the factory hardware on specified applicationsIdeal solution - this connector is a reliable replacement for an original part that is missing or has failed due to fatigue$5.63
- Dorman®HELP™ PCV Valve CoverHELP™ PCV Valve Cover by Dorman®. This PCV valve cover is designed to match the fit and function of the original cover on specified vehicles, and is engineered for durability and reliable performance.Direct replacement - this PCV valve cover is designed to match the fit and function of the original cover on specified vehiclesRestores functionality - this cover is made to fit and fully restore part functionality after the original cover fails$7.22
The PCV (Positive Crankcase Ventilation) system channels harmful crankcase vapors to the air intake in a controlled manner so they can be burned along with the air/fuel mixture. These gases must be allowed to escape from the crankcase or pressure could build up causing gaskets and seals to fail resulting in leaks, and to prevent oil contamination which could reduce the oil’s effectiveness and usable lifespan.
All engines, no matter how new or well-maintained, have a certain amount of “blow-by”, where some of the gases from the combustion chambers leak past the piston rings and cylinder walls. This causes pressure to build up inside the crankcase, which if not provided a path for exit, would instead escape past seals and gaskets, causing engine oil leaks. These gases also mix with moisture in the crankcase to form compounds that are destructive to the engine lubricating oil, causing sludge to form. In the past these gases were allowed to escape from the engine block through a “road draft tube”, but since they contain hydrocarbons (HC), when it was realized in the 1950s that HC was a major cause of smog, a new method for ventilation was needed.
PCV was the earliest emission control system, first appearing on cars in 1961. In this system air enters the crankcase through a crankcase breather tube. The air is filtered either by the engine air filter or by a dedicated crankcase breather filter element. The incoming fresh air mixes with the crankcase vapors and is drawn out from the crankcase into the intake manifold, where it mixes with the incoming air/fuel mixture and is burned in the combustion chambers. The PCV valve is used to regulate the flow of vapors. It contains a restrictor and a light spring.
At idle, not much blow-by is produced but intake manifold vacuum is high. The high level of vacuum causes the restrictor to be drawn against the spring, limiting the flow of vapors. At low engine loads such as would be experienced at cruising speed, less manifold vacuum positions the restrictor to allow a moderate flow of vapors. During high engine load conditions like acceleration, there is a higher amount of blow-by but also minimal engine vacuum. Under these conditions the PCV valve allows the maximum flow of vapors to the intake manifold.