https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image9a51da7735e648caa411dd19fe3015c6.txt

<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

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagecfb361ff6cc54b22b1f30236d8cb84ae.txt

Air Filter Box

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageef32df7428f2425b87301667c1ec9bd3.txt

Mass Air Flow Sensors/Car MAF Sensors | A-Premium

Air Flow Sensor

Air Intake Duct

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image172ed642cd5649409681f03dd9cb3946.txt

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

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image209fc8ff3521428080a60d3b94252f31.txt

Engine Air Filter

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image0a94f36fd961461aa4c6e7d9631359f8.txt

Intake Manifold

Intake Manifold Flap Actuator

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagea8dd964331f6410bbb12b303bd28806f.txt

Intercooler

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image36d1a21a946c40cd88807cac4f16802c.txt

Oxygen Sensor

Car Oxygen Sensor Price From $24.99 | A-Premium

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image2874032448264cc89fcfd3d32e8c4bd4.txt

Pressure Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image71b6637412454ac48505f8fe656d59da.txt

Throttle Body

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image95a81ec8105e4580ac078f34b15f7105.txt

Throttle Position Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagecff91ba9de7c4cb1932d544e82f0bf52.txt

Turbocharger

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagedbb3e2f10990462aa8dbd76eb04c2e54.txt

Turbocharger Oil Line

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image73f58f2321b2459fb6919729a345e546.txt

Vacuum Pump

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagec297244633284630939f3bdf6d50529b.txt

Air Filters & Intake Systems

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image72a54af151ea46ae9a947a6c57ba4aae.txt

Camshaft Adjuster

Camshaft Adjuster Cover

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image0c746ef912ad473cb3d80560a2d7e0a5.txt

Camshaft Timing Gear

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageac12d53c77414db58a69179123e8d9a5.txt

Camshafts

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagecd9a40b4eb4546c08e376fe1b7fe5819.txt

Engine Valve Cover

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagec9ce5895dea14f089b6df8f067fd618b.txt

Harmonic Balancer

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image04246ffa3e3a4cca9c49011214ff6a6f.txt

Timing Belt Kit

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageeeb3265558bd478fbac20059ec555c8c.txt

Timing Chain Kit

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image5af48eb273014fb5a489fe6bb5d14c1e.txt

Timing Cover

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image77c0478f7034493f91708786ed8fc52c.txt

Timing-Control Valve Solenoid

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageff7f4b3ee7204c2d93e5d7f67976617f.txt

Valve Lifters Tappet

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image4ed51fbea7bc4818aa193ac0256a2f42.txt

Cams, Timing & Valvetrain

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image7e54d40a14d3470cb6c0e1820c263b93.txt

Belt Tensioner

Coolant Level Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageef7c9a21b8f3481fafd9dc34deefd95e.txt

Crankcase Breather Hose

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image0f26e0448a8b4d72a06bbefb2c03ab27.txt

Crankshaft Position Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image69a46fdd403d4aee988b03c7ce172cb1.txt

Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagea7c063be923740da92163da876f8499f.txt

Flywheel

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image850df044e5234274b30aa010ee94dba5.txt

Oil Cooler

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageebaf93bfb7c046d789a04bb0ac166235.txt

Oil Cooler Line

Oil Filler Cap

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image0a064858e22c4a7ba148c91978e1e5a8.txt

Oil Filter

Oil Filter Base

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image32b3ec52ad0249e58ed4ae5303d2f0e7.txt

Oil Filter Housing

Oil Filter Housing Cover

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagedef8d67a5f484cb2a2d594d50eb5b73a.txt

Oil Level Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagee113aaa2222d49448a25eb9c355123e1.txt

Oil Pan

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagec53c3f4f8470449caa2c14852afab4e6.txt

Oil Pump

Oil Pump Drive Gear Shaft

Oil Pump Pickup Tube

Cranks, Pistons, Oil & Components

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image5e4e697a02574c87ae0b5cfda83cd3e8.txt

Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

Engine Valve Covers & Ignition Coils Kits

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagec81e856f9df545e6a9f4b11411937f3d.txt

Glow Plug Relay Module

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image74cc3f1efb2d492684aac85a1f3bd96f.txt

Ignition Coil

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image57ca3e4e8038449ab08157e98602f20b.txt

Ignition Coils & Spark Plugs Kits

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image41d187d382d941e79a6cde28a906b960.txt

Ignition Distributor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagedf6ffde1de044334b7320f4e47bcd934.txt

Ignition Starter Switch

Ignition Switch Actuator

Knock Detonation Sensor

Relay

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image50b27b80d8bb4caa97e9d3e5826bee31.txt

Spark Plug

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image27a6097036004160abe4de68c69ffa5c.txt

Spark Plug Wire

Electronic Control Modules, Ignition & Distributors

Engine Wiring Harness

Intake Manifold Repair Kit

Engine Components & Accessories

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image1bcab546ad734695ae275b9f5387598a.txt

Auxiliary Water Pump

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image134c67bba50247a988314c79d505b0d6.txt

Expansion Tank

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagefc43366b4109446c870f3055074a7e71.txt

Expansion Tank Mounting Plate

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imaged8199a7345cc43e88a5d14ecfb40b3a2.txt

Fuel Cooler

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image8ddda567a60c477c9a65cf6cdae4c553.txt

Radiator

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagee5529da684c54cf9bfe4c53e51d23532.txt

Radiator Hose

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagea7d3d16b9dd44ff080d87ecaf742aac8.txt

Radiator Support Assembly

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagedc0ba0ee1887431a9916caaffd9b039b.txt

Temperature Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagef5bb80a8289d4f4aa97ca832df326a98.txt

Turbo Hose

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image140a0119a00647d293656500204d1240.txt

Water Coolant Pipe

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image3f8f1ada421d4315bbe16795fddae29e.txt

Water Outlet

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imaged782e20933d346be8c825ba03dacd7a2.txt

Engine Cooling

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image3baa7d4f13b240f4b434c1a3ecef6b46.txt

Engine Mount

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagef4560369a27b422e8cae72e315cac999.txt

Engine Mounts

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image2bc060e1e59d437ca23550a9632b5785.txt

Catalytic Converter

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image9e0c65cba4314bd3831f99d93c5286bd.txt

EGR Valve

Emissions Fluid Pump

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagecd6cce2d648a4d48968f715fd63dd449.txt

Exhaust Fluid Heater

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image769619b70dfc4e12836a6e96b271bdf2.txt

Exhaust Gas Temperature Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image138fc20360e046148a51e1ac65c19920.txt

Exhaust Manifold

Fuel Tank Breather Valve

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagec580b273dbec426f9ab82d06997d1ac2.txt

Fuel Vapor Leak Detection Pump

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image276214f15ce14047994dab09b028b3d2.txt

Nitrogen Oxide Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagef458952c2a4d48fa8299c4f50b2e07d1.txt

Secondary Air Injection Check Valve

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagec2b2e038a9d248e4b05934cb21b38993.txt

Vapor Canister Vent Solenoid

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageaf4ec04f6a89458b80a30eeb16eadbfb.txt

Exhaust & Emission Systems

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image97facfcbb86b43b4a9ad188ac8fa6c29.txt

Fuel Filter

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image95e2429ba38b48afaf44a5d71960a2b3.txt

Fuel Injection Control Module

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image35a18fc091664f2eb09491c55a106d58.txt

Fuel Injection Pressure Regulator

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image8f88e319f3214f1ca53d04303247e06d.txt

Fuel Injector

Fuel Injector Kit

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image03b440fe157e4382a3e5c145a3a5721f.txt

Fuel Injector Module Wiring Harness

Fuel Line Kit

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image91ddc33aff3241aeadb57bbe08a346b8.txt

Fuel Pump

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagef432a18989f549c2a49737a9ddf24a97.txt

Fuel Sending Unit

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image16546efb48224a6bb15be0aa836d48bc.txt

Fuel Tank Filler Neck Pipe

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image8b0e72eca99740429d7f4987e96df2f7.txt

Fuel Tank Strap

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image538dc8bcfb96428abc9247d043f29d80.txt

High Pressure Fuel Pump

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image73ba032c33ed4306ade78f43cf04508a.txt

Idle Air Control Valve

Mechanical Fuel Pump

Oil Pressure Relief Valve

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image79546737cea74c66b4c6ea8b0c0348c7.txt

Fuel Systems & Components

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image9e422512f0f44681934e568b8dc0892a.txt

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.

BMW 740i Crankcase Breather Valve