WEHRLI CUSTOM FAB WCF100542 2004.5-2007 5.9L CUMMINS OEM PLACEMENT COOLANT TANK KIT

Product Description

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The WEHRLI CUSTOM FAB WCF100542 2004.5-2007 5.9L CUMMINS OEM PLACEMENT COOLANT TANK KIT is a premium cooling system upgrade designed to replace the fragile factory plastic coolant reservoir found on late 3rd-gen Cummins trucks. The factory tank is well known for cracking, leaking, and becoming brittle with heat cycles and age. Wehrli Custom Fab engineered this kit to provide a durable fabricated aluminum solution that mounts in the factory OEM location while dramatically improving reliability and engine bay appearance.

This kit uses a precision fabricated aluminum tank designed specifically for the 2004.5-2007 Ram Cummins platform. The upgraded tank maintains the factory coolant routing while providing a stronger structure capable of withstanding the heat and pressure associated with heavy towing, daily driving, and performance applications. For Cummins owners looking to eliminate one of the most common cooling system failure points, the WCF100542 coolant tank kit is a clean and dependable solution.

Key Benefits:

• Direct replacement for the fragile factory plastic coolant reservoir
• Fabricated aluminum coolant tank for superior durability
• Maintains OEM mounting location and routing
• Improves reliability of the cooling system
• Clean performance look for the engine bay
• Designed specifically for 2004.5-2007 5.9L Cummins trucks
• Simple bolt-on installation
• Made in the USA

Fitment:

• 2004.5 Dodge Ram 2500 5.9L Cummins
• 2005 Dodge Ram 2500 5.9L Cummins
• 2006 Dodge Ram 2500 5.9L Cummins
• 2007 Dodge Ram 2500 5.9L Cummins
• 2004.5 Dodge Ram 3500 5.9L Cummins
• 2005 Dodge Ram 3500 5.9L Cummins
• 2006 Dodge Ram 3500 5.9L Cummins
• 2007 Dodge Ram 3500 5.9L Cummins

What’s Included:

• Fabricated aluminum coolant reservoir tank
• Mounting bracket system
• Coolant hose fittings
• Mounting hardware
• Installation hardware

FAQ

Why upgrade the factory coolant reservoir on a Cummins?

The factory plastic coolant tank on 3rd-gen Cummins trucks is known to become brittle and crack over time due to heat cycles and pressure. The Wehrli aluminum tank eliminates this common failure point while providing better durability and long-term reliability.

Does this tank install in the factory location?

Yes. The WCF100542 is designed for OEM placement, meaning it mounts in the same location as the factory coolant reservoir and integrates with the stock cooling system routing.

Will this work on a 2003 or early 2004 Cummins?

No. This kit is designed specifically for the 2004.5-2007 5.9L Cummins platform and may not fit earlier cooling system configurations.

Is fabrication required for installation?

No fabrication is required. The kit is designed as a direct bolt-on installation using the included brackets and hardware.

Does this improve cooling performance?

The primary benefit is durability and reliability. However, the aluminum construction and improved tank design help maintain consistent coolant system operation during heavy towing and performance use.