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Crankcase Evacuation System
Adding or upgrading a crankcase evacuation system is a great way to decrease pressure inside your vehicle's engine, reducing the possibility of oil leaks and increasing horsepower.
JEGS offers a wide selection of crankcase evacuation systems from top manufacturers such as Mishimoto, Vibrant Performance, Jaz Products, JEGS, and more.
If you're looking to further improve engine efficiency, our beginner's guide to vacuum pumps explains how they can complement a crankcase evacuation system to maximize performance. Each crankcase evacuation system is made from high-quality components and assembly so you can get the performance you want at a price you can afford with the assurance you need.
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In high performance engines, a conventional PCV valve for crankcase ventilation might not be enough to prevent gases from accumulating inside the engine. The optimum situation would be a partial vacuum in the crankcase, helping to reduce wear, enhance performance and stretch the life of the engine. A partial vacuum in the crankcase ensures that oil stays where it belongs and circulates through the engine properly, from the crank and bearings all the way up to the valve train and rockers.
This is where you can find everything you need to address this issue, including crankcase vacuum pumps and crankcase evacuation pumps from brands like Earl's, Motorcraft, Moroso, Mishimoto, Vibrant Performance, Jaz Products, Milodon, Dynatech and Aerospace Components. That includes breather filters, air/oil separators, oil catch cans, electric crankcase vacuum pumps, breather tanks and all the fittings and connections necessary for installation. All crankcase evacuation systems are built from top grade materials and components so that you can get the engine protection and performance you need at a price you can afford.
Why is a crankcase evacuation system important for your engine? Combustion naturally has byproducts like water vapor, half-burned hydrocarbons, acids and gases that can build up inside the crankcase. Too much pressure from these gases can lead to poor seals around the piston rings, with increased blowby, poor lubrication along the cylinder walls (which speeds up engine wear) and contaminated oil.
These problems can be especially acute in humid environments, where moisture and vapor in the crankcase can build up quickly. In addition, inadequate crankcase ventilation and excess internal pressure can cause gaskets to fail, leading to leaks around valve covers, the oil pan or rear main seal. Track and dyno tests as well as real-world examples show that proper crankcase evacuation can boost performance and help address all these problems.
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P5007052 Replacement Valve Cover Baffles & Screws Kit for Small/Big Block, Magnum V8 Engines
Part Number: 312-P5007052
Ships Today
Lowest price guarantee
MOPAR PERFORMANCE
P5007052 Replacement Valve Cover Baffles & Screws Kit for Small/Big Block, Magnum V8 Engines
Part Number: 312-P5007052
Ships TodayLowest Price Guarantee
HAWKS MOTORSPORTS
CBW-159 Vacuum Pump Delete Plate, GM Gen V LT, Billet Aluminum
Part Number: 199-CBW-159
Ships on Sep 02, 2026Lowest price guarantee
HAWKS MOTORSPORTS
CBW-159 Vacuum Pump Delete Plate, GM Gen V LT, Billet Aluminum
Part Number: 199-CBW-159
Ships on Sep 02, 2026Lowest Price Guarantee
What Is a Crankcase Evacuation System?
A crankcase evacuation system, sometimes referred to as an exhaust evacuation kit, is an essential component in many high-performance and racing vehicles. It plays a crucial role in maintaining the health and efficiency of your engine. But what exactly is a crankcase evacuation system?
A crankcase evacuation system is designed to remove harmful gases, pressure, and excess moisture from the engine's crankcase. It helps to create a controlled vacuum inside the crankcase, which offers several benefits:
- **Reduced Pressure:** The system reduces the pressure inside the crankcase, preventing oil leaks and gasket failures. Excessive pressure can force oil past seals and into places it shouldn't be, causing engine damage.
- **Improved Piston Ring Seal:** By maintaining a vacuum in the crankcase, a crankcase evacuation system helps improve the seal of the piston rings. This can lead to increased power and efficiency.
- **Reduced Blow-By:** Blow-by is the escape of combustion gases past the piston rings into the crankcase. A crankcase evacuation system helps reduce blow-by, which can contaminate the oil and reduce engine performance.
- **Enhanced Ring and Cylinder Lubrication:** Proper evacuation helps ensure that the oil is distributed effectively to lubricate the piston rings and cylinder walls, preventing friction-related damage.
- **Moisture Removal:** The system removes excess moisture from the crankcase, which can be especially beneficial in humid environments. Moisture can lead to corrosion and other issues.
What Happens When There Is a Vacuum in the Crankcase?
When a vacuum is maintained in the crankcase, several positive effects occur:
- **Improved Piston Ring Seal:** The vacuum helps keep the piston rings seated against the cylinder walls, reducing blow-by and increasing engine efficiency.
- **Reduced Oil Leaks:** Lower crankcase pressure reduces the likelihood of oil leaks and gasket failures, ensuring that oil stays where it belongs.
- **Enhanced Lubrication:** With a controlled vacuum, oil can be more precisely distributed to lubricate critical engine components, minimizing wear and tear.
- **Prevention of Contamination:** The vacuum prevents the entry of contaminants into the crankcase, helping to maintain oil quality and engine cleanliness.
Overall, a crankcase evacuation system plays a vital role in optimizing engine performance, protecting engine components, and extending the life of your vehicle.
How Much Does a Crankcase Evacuation Kit Cost?
The cost of a crankcase evacuation kit can vary depending on several factors:
1. **Kit Components:** Crankcase evacuation kits can include various components, such as hoses, fittings, vacuum pumps, and catch cans. The complexity and completeness of the kit can impact its cost.
2. **Brand and Quality:** Reputable brands with a history of quality and performance may offer higher-priced kits. High-quality components are essential to ensure the system's effectiveness.
3. **Application:** The cost may also vary based on the specific requirements of your vehicle. Some kits are designed for specific engine types or applications, and these factors can influence the price.
As a general guideline, crankcase evacuation kits can range from around $100 to several hundred dollars or more. It's important to choose a kit that matches your engine's needs and performance goals while staying within your budget.
Explore our selection of crankcase evacuation systems to find the right kit for your vehicle and enjoy the benefits of improved engine performance and longevity.