Gates EMH166 Engine Crankcase Breather Hose - Valve Cover To Intake Tube

Gates EMH166 Emission Control Hose

The Gates EMH166 is an OE-exact engine crankcase breather hose built for emission control service. It restores the crankcase ventilation path with the correct molded shape, clip-on and push-in ends, and durable plastic and rubber construction.

Compatible with Buick LaCrosse valve cover to intake tube applications, this Gates Emission Control Hose line is made for direct replacement needs where factory-style routing and fit are important. The EMH166 is engineered to match the original hose layout for 2010 and 2012-2016 Buick LaCrosse models.

Key Features

• OE Exact replacement for crankcase ventilation and emission control service
• Fits Buick LaCrosse valve cover to intake tube routing
• Molded hose design for factory-style fitment
• Plastic and rubber construction for durability and service life
• Clip-on and push-in end types for proper connection points
• Protective sleeve included for added hose protection
• OE comparison rating: OE Exact

Product Details

Gates EMH166 is an engine crankcase breather hose designed to restore emission system operation and performance. It features a 27-inch centerline length, 14 mm and 9 mm inside diameters, one quick connector, and a molded profile that follows the original routing. This part cross-references 12633396 for the same application. Use EMH166 when replacing a worn or damaged Buick LaCrosse crankcase ventilation hose and you need a direct-fit solution that matches the factory connection style.

Common Problems This Hose Can Address

• Cracked or brittle crankcase breather hose material
• Loose or damaged hose connections at the valve cover or intake tube
• Emission system leaks caused by deteriorated hose routing
• Improper crankcase ventilation flow from a failed hose
• Noise, odor, or drivability concerns related to hose leakage

Installation Notes and Tips

Verify the hose routing before removal so the replacement follows the original path from the valve cover to the intake tube. Inspect the mating ports, clips, and nearby breather components for wear or contamination before installing the new hose. Confirm the end types and diameter match the vehicle connection points on the Buick LaCrosse before final assembly.

Quality Assurance

Gates builds its Emission Control Hose line with OE-exact dimensions and durable materials to support long service life in crankcase ventilation and emission control applications. EMH166 is intended to restore factory-style operation on the specified Buick LaCrosse fitments.