Gates EMH001 Engine Crankcase Breather Hose - Oil Separator To Engine

OE-Exact Crankcase Breather Hose

Gates EMH001 is an OE-exact engine crankcase breather hose for emission control service. Built from rubber and aluminum, it restores the crankcase ventilation path with a direct replacement design for 2011-2016 Chevrolet Silverado 2500 HD and Silverado 3500 HD, as well as GMC Sierra 2500 HD and Sierra 3500 HD applications.

The Gates Emission Control Hose line focuses on replacement hoses that match original equipment fit and function. EMH001 follows that approach with a formed hose layout, protective sleeve, and OE-grade construction for the oil separator to engine connection.

Key Features

• OE Exact grade replacement for crankcase ventilation and emission control service
• Rubber and aluminum construction for durability and service life
• Fits oil separator to engine routing on select Chevrolet and GMC heavy-duty trucks
• End types include bolt-on and push-in connections
• Protective sleeve included for added abrasion resistance
• Direct replacement for Gates EMH001 and OE reference 12657323

Detailed Description

Gates EMH001 is engineered as an engine crankcase breather hose for the emission control system. It is built to OE-exact standards and uses materials selected for long-term service in crankcase ventilation routing. With a centerline length of 25.5 inches (648 mm) and inside diameter specifications of 0.3, 0.4, 9, and 11, this hose is formed to match the original path between the oil separator and engine.

Compatible With 2011-2016 Chevrolet Silverado 2500 HD, oil separator to engine; 2011-2016 Chevrolet Silverado 3500 HD, oil separator to engine; 2011-2016 GMC Sierra 2500 HD, oil separator to engine; and 2011-2016 GMC Sierra 3500 HD, oil separator to engine. If you are replacing a worn Silverado 2500 HD breather hose or servicing a Sierra 3500 HD emission hose, EMH001 provides a direct-fit solution for the listed applications.

This part cross-references OE number 12657323 for the same application.

Common Issues This Part Addresses

• Cracked or hardened crankcase breather hose material
• Oil separator to engine hose leakage
• Restricted crankcase ventilation flow
• Emission system performance concerns caused by hose deterioration
• Fitment problems from a damaged or misshaped replacement hose

Installation Notes and Tips

Verify the vehicle year, make, model, and oil separator to engine routing before installation. Confirm the end styles match the original connection points and inspect adjoining fittings for wear, contamination, or damage that could affect sealing. Because this hose uses OE-exact dimensions, it should be installed in the original routing path without modification.

Quality Assurance

Gates designs this Emission Control Hose line as an OE-style replacement solution for crankcase ventilation and emission control service. EMH001 is built to restore the emission system to proper operation with materials chosen for durability and maximum service life.