Mahle GS33445 Engine Crankcase Vent Valve Seal

Mahle Crankcase Vent Valve Seal for Ford Super Duty

The Mahle GS33445 crankcase vent valve seal is an OEM-standard rubber sealing component for crankcase breather service. It is built for applications that require a reliable seal at the left valve cover on select Ford Super Duty trucks and vans.

Mahle’s gasket and sealing line focuses on OE-style fit and material consistency for engine sealing repairs. The GS33445 follows that approach with rubber construction and application-specific coverage for Ford E-350 Super Duty, F-250 Super Duty, F-350 Super Duty, E-350 Club Wagon, and Excursion models.

Key Features

• Mahle GS33445 engine crankcase vent valve seal
• Rubber gasket material for sealing service
• OEM Standard item grade
• Application-specific fit for left valve cover crankcase breather service
• Compatible with Ford and Navistar cross-reference applications
• Designed for emission control sealing systems

Detailed Description

The Mahle GS33445 is an engine crankcase vent valve seal used in emission control sealing applications where the crankcase breather assembly services the left valve cover. This part number is listed for 2003-2007 Ford F-250 Super Duty, 2003-2007 Ford F-350 Super Duty, 2003-2005 Ford Excursion, 2004-2005 Ford E-350 Club Wagon, and 2004-2010 Ford E-350 Super Duty. It also cross-references Ford W301373 and Navistar 1844156 / 1844156C1 for the same application.

Built with rubber and specified as OEM Standard, the GS33445 is suited for technicians replacing a worn crankcase breather gasket on Ford Super Duty and related platforms. Search terms such as Mahle GS33445 Ford F-250 Super Duty crankcase breather gasket, Mahle GS33445 Ford E-350 Super Duty valve cover seal, and Ford Excursion crankcase vent valve seal point to the same service part.

Common Repair Symptoms

• Oil seepage around the crankcase breather or valve cover area
• Damaged or flattened breather seal during service
• Air leakage at the crankcase vent sealing point
• Maintenance replacement during valve cover or breather work
• Emission control sealing wear on high-mileage Ford Super Duty engines

Installation Notes and Tips

Confirm the vehicle year, engine configuration, and left valve cover breather location before installation. Clean the sealing surface thoroughly and inspect the breather assembly for damage or distortion that could affect seal retention. Verify the old seal profile against the Mahle GS33445 before reassembly.

Quality Assurance

Mahle gaskets and sealing products are used by OEMs and technicians worldwide, and this part is built to OEM-standard expectations for fit and sealing performance.