WEHRLI CUSTOM FAB WCF100131 2001-2010 LB7 LLY LBZ LMM DURAMAX WCFAB X PPE HIGH-CAPACITY CAST ALUMINUM OIL PAN

Product Description

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The WEHRLI CUSTOM FAB WCF100131 DURAMAX HIGH-CAPACITY CAST ALUMINUM OIL PAN is a premium lubrication system upgrade engineered for 2001-2010 GM 6.6L Duramax LB7, LLY, LBZ, and LMM engines. Developed through a collaboration between Wehrli Custom Fab and PPE, this heavy-duty cast aluminum oil pan increases oil capacity while improving heat dissipation and long-term durability under high load conditions.

Compared to the restrictive factory stamped steel pan, this high-capacity design helps maintain more stable oil temperatures, improves lubrication volume during heavy towing or performance use, and provides exceptional structural strength thanks to its thick cast aluminum construction. It is a popular upgrade for trucks running increased horsepower, heavy towing loads, or long-duration operation where maintaining oil supply and cooling is critical.

In addition to performance benefits, the WCF100131 also improves engine serviceability and durability. Integrated cooling fins assist with thermal management, while the precision-machined mounting surface ensures a leak-free seal when installed with proper gaskets and hardware.

Key Features:

• High-capacity oil pan design increases engine oil volume
• Heavy-duty cast aluminum construction for strength and durability
• Cooling fins help dissipate heat and stabilize oil temperatures
• Improves lubrication supply under high load and performance applications
• Engineered through collaboration between Wehrli Custom Fab and PPE
• Precision machined sealing surface for leak-free installation
• Ideal for towing, performance builds, and long-duration engine operation

Fitment:

• 2001 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LB7
• 2002 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LB7
• 2003 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LB7
• 2004 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LB7
• 2004.5 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LLY
• 2005 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LLY
• 2006 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LLY
• 2006 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LBZ
• 2007 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LBZ
• 2007.5 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
• 2008 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
• 2009 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
• 2010 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LMM
• 2001-2010 GMC Sierra 2500HD / 3500HD 6.6L Duramax LB7 LLY LBZ LMM

FAQ

How much additional oil capacity does this pan add?

The WCF100131 increases overall engine oil capacity compared to the factory pan, helping maintain stable lubrication under heavy loads and high-temperature operating conditions.

Why upgrade to a cast aluminum oil pan?

Cast aluminum pans provide better heat dissipation, increased structural strength, and improved durability compared to thin stamped factory oil pans.

Is this oil pan compatible with all Duramax engines?

This pan is designed specifically for 2001-2010 LB7, LLY, LBZ, and LMM Duramax engines. It is not intended for later LML or L5P applications.

Does this oil pan improve engine cooling?

Yes. The integrated cooling fins and additional oil capacity help reduce oil temperature spikes during towing, racing, or heavy workload conditions.

Is professional installation recommended?

Because oil pan installation involves removing the factory pan and resealing the engine block surface, professional installation or experienced mechanical knowledge is recommended.