Gates EMH988 Engine Crankcase Vent Valve - PCV Valve

Gates EMH988 Crankcase Vent Valve

The Gates EMH988 crankcase vent valve is an OE-exact replacement for Subaru crankcase ventilation service. Built with a steel body and a single hose connector, it is made for direct-fit installation and consistent crankcase pressure control.

For Subaru Impreza, WRX, WRX STI, Legacy, Forester, Outback, and Baja applications, this Gates crankcase vent valve helps restore proper emission ventilation system operation. The EMH988 is a practical choice when replacing a worn PCV valve on Subaru models that need an OE-style fit and function.

Key Features

• OE-exact crankcase vent valve for direct replacement
• Steel construction for durable service
• Single hose connector layout
• Includes PCV valve content as listed
• Cross-reference: 11810AA040
• Part number: EMH988

Product Details

Gates EMH988 is part of the brand’s crankcase ventilation line, which includes crankcase ventilation pressure regulators, PCV valves, and oil separators. This product line is focused on exact-fit replacement parts that restore emission ventilation performance and simplify installation on the vehicle. The EMH988 is engineered for Subaru crankcase ventilation service where an OE-style replacement is needed.

Compatible With Subaru Impreza, WRX, WRX STI, Legacy, Forester, Outback, and Baja applications across the listed model years. Fits 2000-2008 Subaru Impreza, PCV Valve; Fits 2009-2011 Subaru Impreza, PCV Valve, Eng. No. 5792108 & Before; Fits 2012-2014 Subaru Impreza, PCV Valve; Fits 2012-2014 Subaru WRX, PCV Valve; Fits 2013-2014 Subaru WRX STI, PCV Valve; Fits 2001-2009 Subaru Legacy, PCV Valve; Fits 2011 Subaru Legacy, PCV Valve; Fits 2001-2007 Subaru Forester, PCV Valve; Fits 2008 Subaru Forester, PCV Valve, W/O Calif. Emission System; Fits 2009 Subaru Forester, PCV Valve; Fits 2010 Subaru Forester, PCV Valve, Eng. No. 5792108 & Before; Fits 2001-2003 Subaru Outback, PCV Valve; Fits 2005-2008 Subaru Outback, PCV Valve; Fits 2003-2006 Subaru Baja, PCV Valve.

Common Issues This Part Addresses

• Excess crankcase pressure from a worn PCV valve
• Rough idle related to ventilation system restriction
• Oil vapor control problems in the crankcase ventilation system
• Emission system performance loss caused by a failing vent valve
• Fitment issues when replacing an OE Subaru crankcase vent valve

Installation Notes

Verify the vehicle year, model, and engine notes before installation, especially on Subaru Impreza and Forester applications with engine-number or emissions-system restrictions. Match the hose connection and mounting location to the original part, and inspect nearby vacuum hoses for wear before completing the repair. The EMH988 is intended as a direct replacement for the listed PCV valve position.

Quality Assurance

Gates manufactures OE-exact crankcase ventilation components to help restore emission ventilation system operation and service life. The EMH988 is built to the same fit and function expectations used for Subaru crankcase ventilation replacement service.