Gates EMH996 Engine Crankcase Vent Valve

Gates EMH996 Crankcase Vent Valve

The Gates EMH996 crankcase vent valve is an OE-exact replacement for vehicles that need precise crankcase ventilation pressure control. Built from plastic and supplied with the PCV valve and bolt, it supports a direct-fit repair for emission system service on select Chevrolet, GMC, Buick, and Cadillac models.

Key Features

• OE-exact crankcase ventilation pressure regulator for accurate fitment
• Plastic construction for a direct replacement profile
• Inside diameter: 12 mm (.47 in.)
• One hose connector for the specified application
• Includes PCV valve and bolt
• Gates EMH996 for emission control service

Product Details

Gates EMH996 is part of the Gates Crankcase Vent Valve line, which focuses on OE-style crankcase ventilation pressure regulators, PCV valves, and oil separators. The goal is straightforward: restore the emission ventilation system to proper operation with a part that matches the original fit and installation layout. This makes it a practical choice for service on applications such as the Chevrolet Colorado, GMC Canyon, Chevrolet Blazer, GMC Acadia, Buick Envision, Chevrolet Impala, Cadillac ATS, Chevrolet Malibu Limited, Cadillac CTS, and Chevrolet Malibu.

This part cross-references GM 12655399 for the same application.

What It Helps Address

• Crankcase pressure control issues
• Oil vapor routing problems in the ventilation system
• Emission system fault conditions related to PCV operation
• Rough idle or drivability concerns tied to ventilation flow
• Fitment problems caused by worn or damaged vent valve components

Installation Notes and Tips

Verify the vehicle year, make, and model against the listed fitment before installation. Confirm the hose connection size and mounting style match the original part, and inspect the surrounding ventilation hoses and seals for wear before reassembly. For best results, replace the valve only after the engine is cool and the intake area is clean.

Quality Assurance

Gates positions this crankcase vent valve as an OE-exact replacement engineered to restore emission ventilation performance and support long service life in the crankcase ventilation system.