Mahle GS34012 Engine Crankcase Vent Valve Seal

Engine Crankcase Vent Seal Set

MAHLE GS34012 is an OEM-standard crankcase vent valve seal set for Ford diesel applications that need a precise sealing fit. It is built for crankcase ventilation service where worn seals can allow leaks and reduce sealing integrity.

Key Features

• OEM-standard replacement seal set for crankcase vent valve service
• Includes CCV vent bolt O-rings and CCV vent seals
• Molded rubber construction for sealing consistency
• MAHLE sealing products are trusted by OEMs and technicians worldwide
• Fits a wide range of Ford E-Series and Super Duty applications

Detailed Description

MAHLE GS34012 is a crankcase vent valve seal set engineered for direct sealing service on Ford trucks and vans. The molded rubber design and OEM-standard grade support a reliable seal at the crankcase ventilation connection, helping restore proper sealing performance when original components age or harden. This part number, GS34012, is listed for multiple Ford applications including E-350, F-250, F-350, and Excursion models. If you are replacing a worn crankcase vent valve seal on a Ford E-350 Super Duty or Ford F-350 Super Duty, GS34012 provides the correct sealing components for the job.

What It Is Used For

• Stopping oil vapor or crankcase ventilation leaks at the seal interface
• Replacing hardened, flattened, or damaged vent seals
• Restoring a tight seal after CCV service
• Addressing seepage caused by worn O-rings

Installation Notes and Tips

Verify the vehicle year, model, and crankcase ventilation configuration before installation. Clean the sealing surfaces thoroughly and inspect the vent valve components for wear or damage before installing the new seals. Confirm fitment against the application listing for GS34012 before service.

Quality Assurance

MAHLE gaskets are recognized for sealing performance and are used by OEMs and technicians around the world. This part is specified as OEM Standard for consistent replacement quality.