PCV & Breather Components
- 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$1.22 - $284.21Save: up to 12%$1.10 - $255.80
- Genuine®Crankcase Breather HoseCrankcase Breather 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...Made with precision and quality in mindDesigned to meet your specific needs$4.80 - $580.58
- Gates®Engine Crankcase Breather HoseEngine Crankcase Breather Hose by Gates®. 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...High quality at an affordable priceExpertly made from premium materials$3.52 - $361.98
- Mopar®Breather HoseBreather 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 of...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$5.47 - $1,080.45Save: up to 12%$4.92 - $959.00
- Genuine®PCV Valve HosePCV Valve 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...Made with precision and quality in mindDesigned to meet your specific needs$8.60 - $561.80
- Motorcraft®PCV Valve HosePCV Valve Hose by Motorcraft®. Motorcraft PCV Valve hose is designed for maximum performance and durability. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and...Direct OEM replacementMeets strict Ford Motor Company standards$12.51 - $135.56
- ACDelco®Genuine GM Parts™ PCV Valve HoseGenuine GM Parts™ PCV Valve Hose 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$7.53 - $137.57Save: up to 16%$6.40 - $116.93
- 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$9.50 - $97.64
- 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 - $31.86
- 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
- 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$3.77 - $60.31
- 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$20.75 - $151.32Save: up to 18%$17.64 - $127.87
- ACDelco®Gold™ Positive Crank Ventilation Valve TubeGold™ Positive Crank Ventilation 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$26.85Save: 15%$22.82
- 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$27.67 - $41.72
- 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$6.69 - $129.16
- 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$4.36 - $30.90
- 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$2.33 - $6.99
- 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$20.37 - $29.54
- Genuine®Oil Separator HoseOil Separator 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...Made with precision and quality in mindDesigned to meet your specific needs$14.48 - $244.35
- Genuine®PCV Breather Cap BoltPCV Breather Cap Bolt 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$3.92 - $31.11
- Standard®Intermotor™ PCV Valve GrommetIntermotor™ PCV Valve Grommet 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...Made with precision and quality in mindDesigned to meet your specific needs$2.02 - $3.46
- 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$2.16 - $6.20
- Beck Arnley®PCV Valve GrommetPCV Valve Grommet by Beck Arnley®. For one hundred years, Beck Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in the 1950's, brand understand...OE quality products from top original equipmentTop quality materials$1.43 - $3.07
- 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$5.85 - $114.44
- URO Parts®PCV Valve GrommetPCV Valve Grommet by URO Parts®. Make your vehicle operating quiet again by replacing your malfunctioning component with this top-notch emission control part. The dependable URO part will make your exhaust system work as it should and...Designed to replace your worn out exhaust partHelps to restore quiet vehicle operation$3.40 - $7.32
- 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$58.59 - $78.40
- ACDelco®GM Original Equipment PCV Valve HoseGM Original Equipment PCV Valve Hose 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$38.81 - $68.53Save: up to 15%$32.99 - $58.72
- ACDelco®GM Original Equipment PCV Valve Hose ClampGM Original Equipment PCV Valve Hose Clamp 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$14.75 - $15.18Save: 15%$12.54 - $12.90
- ACDelco®GM Original Equipment™ PCV Valve GasketGM Original Equipment™ PCV Valve Gasket 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$8.99 - $12.93Save: 15%$7.64 - $10.99
- ACDelco®GM Original Equipment™ PCV Valve Hose AdapterGM Original Equipment™ 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...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$13.95Save: 15%$11.86
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.