HomeEmission Control > Crankcase Ventilation SystemGates EMH921 Engine Crankcase Vent Valve - Oil Separator
Part #: EMH921

Gates EMH921 Engine Crankcase Vent Valve - Oil Separator

Crankcase Vent Valve, Oil Separator
⚙️ 11 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Crankcase Vent Valve, Oil Separator
🚗Fitment: BMW, 540i, 740i, and 740iL
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Overview of Gates Crankcase Vent Valve EMH921

The Gates Crankcase Vent Valve EMH921 is designed to maintain proper crankcase ventilation in select BMW models. Engineered with durable plastic and featuring dual hose connectors, this valve supports efficient oil separation and emission control.

  • Constructed from high-quality plastic for durability
  • Two hose connectors for secure attachment
  • Inside diameters of 0.7 inches (18 mm) and 0.26 inches (7 mm) for precise fitment
  • Includes an integrated oil separator to reduce emissions
  • Compatible with BMW 540i, 740i, and 740iL models

Detailed Product Description

The Gates Crankcase Vent Valve EMH921 is part of the Crankcase Vent Valve product line, which focuses on controlling crankcase pressure and reducing harmful emissions. This engine crankcase vent valve is made from plastic, ensuring resistance to corrosion and heat within the engine bay. It features two hose connectors with inside diameters of 0.7 inches (18 mm) and 0.26 inches (7 mm), allowing for a secure and precise connection to the crankcase ventilation system. The integrated oil separator helps to trap oil vapors, preventing them from entering the intake system and reducing engine deposits.

Compatible Vehicles and Applications

This crankcase vent valve is specifically designed for use in BMW vehicles, including the 540i, 740i, and 740iL models. The part number EMH921 ensures exact fitment and compatibility with these models, supporting proper engine ventilation and emission control.

  • Prevents excessive crankcase pressure buildup
  • Reduces oil vapor contamination in the intake system
  • Helps maintain engine performance and efficiency
  • Supports compliance with emission regulations
  • Minimizes engine oil leaks and sludge formation

Installation Notes and Tips

When installing the Gates Crankcase Vent Valve EMH921, ensure that the hose connectors match the specified inside diameters of 0.7 inches (18 mm) and 0.26 inches (7 mm) for a proper seal. Inspect the surrounding hoses and connections for wear or damage before installation. Proper routing of hoses is essential to maintain effective ventilation and prevent vacuum leaks.

Quality Assurance and Warranty

Gates is a recognized manufacturer in the automotive industry, known for producing reliable emission control components. The Crankcase Vent Valve EMH921 is manufactured to meet OEM specifications for fit and function. While specific warranty details are not provided, Gates products typically come with a limited warranty against defects in materials and workmanship.

BrandGates
Part NumberEMH921
PositionCrankcase Vent Valve, Oil Separator
MaterialPlastic
Inside Diameter.26
Inside Diameter.7
Inside Diameter18
Inside Diameter7
Hose Connector Quantity2
ContentsOil separator
Inside Diameter 1 (in).7
Inside Diameter 1 (mm)18
Inside Diameter 2 (in).26
Inside Diameter 2 (mm)7
MaterialPlastic
Number of Hose Connectors2

This part fits 11 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2003BMW540i4.4LV8GASOil SeparatorCrankcase Vent Valve
2002BMW540i4.4LV8GASOil SeparatorCrankcase Vent Valve
2001BMW540i4.4LV8GASOil SeparatorCrankcase Vent Valve
2001BMW740i4.4LV8GASOil SeparatorCrankcase Vent Valve
2001BMW740iL4.4LV8GASOil SeparatorCrankcase Vent Valve
2000BMW540i4.4LV8GASOil SeparatorCrankcase Vent Valve
2000BMW740i4.4LV8GASOil SeparatorCrankcase Vent Valve
2000BMW740iL4.4LV8GASOil SeparatorCrankcase Vent Valve
1999BMW540i4.4LV8GASOil SeparatorCrankcase Vent Valve
1999BMW740i4.4LV8GASOil SeparatorCrankcase Vent Valve
1999BMW740iL4.4LV8GASOil SeparatorCrankcase Vent Valve

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

11151705272EMH921

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.