Wehrli WCFab X Fleece Thermostat Housing

1998–2018 Dodge / Ram 2500 & 3500 5.9L & 6.7L Diesel

Part #: WCF100157-SGS

Overview

The Wehrli WCFab X Fleece Thermostat Housing is a premium direct replacement for the factory thermostat housing found on Dodge and Ram 2500 and 3500 trucks equipped with 5.9L and 6.7L Cummins diesel engines from 1998 through 2018. Designed to upgrade the OEM coolant elbow, this housing not only improves the engine bay’s appearance with its vibrant Sparkle Granny Smith powder coat finish but also enhances functionality with a customizable coolant port. It’s an ideal solution for diesel enthusiasts seeking a reliable, durable, and visually appealing cooling system component that integrates seamlessly with other WCFab and Fleece Performance upgrades.

Whether you’re restoring your truck, upgrading your cooling system, or customizing coolant routing for enhanced performance or maintenance ease, this thermostat housing offers a robust and stylish alternative to the stock part.

Key Features

Engineered for durability and customization, the Wehrli WCFab X Fleece Thermostat Housing offers several standout features:

• Direct OEM replacement for part number 68145495AA, ensuring perfect fitment and compatibility
• Includes a coolant port with a removable plug, allowing for flexible coolant routing and accessory integration
• Finished in a vibrant Sparkle Granny Smith powder coat for corrosion resistance and a unique aesthetic
• Compatible with WCFab Upper Coolant Pipes, Intake Kits, and Intercooler Piping for a coordinated upgrade
• Constructed from high-quality materials designed to withstand harsh diesel engine environments
• Designed specifically for 5.9L and 6.7L Cummins engines in Dodge/Ram trucks from 1998 to 2018
• Improves engine bay appearance by replacing the unsightly OEM thermostat housing
• Precision-machined for reliable sealing and leak prevention

Construction & Design

The thermostat housing is crafted from premium-grade aluminum, providing excellent strength-to-weight ratio and superior heat dissipation compared to the original plastic or cast components. The housing is precision-machined to ensure a perfect seal with the engine block and thermostat, preventing coolant leaks and maintaining optimal engine temperature control. The Sparkle Granny Smith powder coat finish not only adds a striking visual upgrade but also offers long-lasting corrosion resistance to protect against the rigors of daily driving and harsh under-hood conditions.

Its integrated coolant port with a plug allows for easy customization of coolant lines, making it a versatile choice for those running aftermarket cooling components or custom setups.

Installation & Fitment

Installation is straightforward as this thermostat housing is a direct bolt-on replacement for the OEM part number 68145495AA. It fits the following vehicles:

• 1998–2007 Dodge Ram 2500 5.9L Diesel
• 1998–2007 Dodge Ram 3500 5.9L Diesel
• 2008–2010 Dodge Ram 2500 6.7L Diesel
• 2008–2009 Dodge Ram 3500 6.7L Diesel
• 2011–2018 Ram 2500 6.7L Diesel
• 2011–2018 Ram 3500 6.7L Diesel

No modifications are required for installation, making it an ideal upgrade for both professional mechanics and DIY enthusiasts. The included coolant port plug can be removed or installed depending on your cooling system configuration.

What's Included

• Wehrli WCFab X Fleece Thermostat Housing (Sparkle Granny Smith finish)
• Coolant port plug installed
• Installation hardware (where applicable)

Ideal For

This thermostat housing is perfect for Dodge and Ram diesel truck owners who want to replace their aging or damaged OEM thermostat housing with a more durable, customizable, and visually appealing component. It is especially suited for enthusiasts upgrading their cooling system with WCFab or Fleece Performance parts, as well as those seeking improved coolant routing options for enhanced engine cooling efficiency or accessory integration.

Wehrli Custom Fabrication (WCFab) is a diesel performance and metal fabrication specialist building upgraded hard parts and engineered solutions for Duramax, Cummins, and Power Stroke trucks. Known for high-quality fabrication and truck-focused product development, WCFab supports everything from tow rigs to race-oriented diesel builds where durability, airflow, and heat management matter.