Gates EMH934 Engine Crankcase Vent Valve - Oil Separator

Gates EMH934 Crankcase Vent Valve Overview

The Gates EMH934 is an OE-exact crankcase vent valve and oil separator built for emission control service. It is made from plastic and uses a three-hose-connector layout with multiple inside diameter sizes for a precise replacement on select BMW applications.

For BMW Z3, 323i, 323is, 328i, 328is, 528i, and M3 models, this Gates crankcase ventilation component helps restore proper crankcase pressure regulation and oil separation performance. The EMH934 is a direct-fit service part for vehicles that need an exact-match crankcase vent valve replacement.

Key Features

• OE-exact crankcase ventilation pressure regulator and oil separator design
• Plastic construction for emission system service applications
• Three hose connectors for the listed BMW crankcase ventilation routing
• Multiple inside diameter measurements: .31, .62, .9, 8, 16, and 23
• Direct replacement part number: Gates EMH934
• Cross-reference: Dorman OE Solutions 911-113

Detailed Product Description

Gates EMH934 is part of the Gates Crankcase Vent Valve line, a product line focused on OE-exact crankcase ventilation pressure regulators, PCV valves, and oil separators. This part is engineered to match the original configuration closely, helping maintain the intended operation of the emission ventilation system on select BMW models. If you are replacing a BMW Z3 oil separator or servicing a crankcase vent valve on a 1997-2000 BMW Z3, 1998-1999 BMW 323i or 323is, 1997-1999 BMW 328i or 328is, 1997-1998 BMW 528i, or 1998 BMW M3, EMH934 provides the correct application-specific fitment.

What This Part Helps Address

• Excess crankcase pressure from a worn vent valve
• Oil vapor separation issues in the crankcase ventilation system
• Rough idle or drivability concerns related to ventilation faults
• Oil contamination in intake-related emission components
• Emission system performance loss caused by a failing separator

Installation Notes and Tips

Verify the vehicle’s year, model, and crankcase ventilation layout before installation. This part is listed for the oil separator position and should be matched to the existing hose routing and connector sizes on the vehicle. Confirm the replacement against the original part number EMH934 and the vehicle’s OE configuration before service.

Quality Assurance

Gates supplies OE-exact crankcase ventilation solutions intended to restore emission system operation and performance levels while supporting long service life in the crankcase ventilation system.