Wehrli WCFab X Fleece Thermostat Housing

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

Part #: WCF100157-CT

Overview

The Wehrli WCFab X Fleece Thermostat Housing is a premium direct replacement for the factory coolant elbow on Dodge and Ram trucks equipped with 5.9L and 6.7L Cummins diesel engines from 1998 through 2018. Designed to upgrade the often fragile and visually unappealing OEM thermostat housing, this part offers enhanced durability and a sleek appearance with its vibrant candy teal powder coat finish. It is ideal for diesel enthusiasts looking to improve engine bay aesthetics while maintaining reliable cooling system performance.

Featuring a built-in port with a plug, this thermostat housing allows for customizable coolant routing, enabling tailored setups for additional cooling components or sensors. It pairs perfectly with other WCFab and Fleece Performance Engineering upgrades such as upper coolant pipes, intake kits, and intercooler piping, making it a versatile choice for those building a high-performance or show-quality diesel truck.

Key Features

Engineered for durability and style, the Wehrli WCFab X Fleece Thermostat Housing offers several key benefits:

• Direct OEM replacement for Chrysler part number 68145495AA
• Compatible with 1998–2007 Dodge Ram 2500 & 3500 5.9L diesel engines
• Fits 2008–2010 Dodge Ram 2500 and 2008–2009 Dodge Ram 3500 6.7L diesel engines
• Also fits 2011–2018 Ram 2500 and 3500 6.7L diesel engines
• Durable powder-coated finish in candy teal for corrosion resistance and visual appeal
• Integrated coolant port with plug for customizable coolant routing options
• Precision CNC-machined for perfect fit and reliable sealing
• Designed to complement other WCFab and Fleece Performance upgrades
• Improves engine bay aesthetics by replacing the OEM plastic housing with a robust metal unit

Construction & Design

This thermostat housing is crafted from high-quality billet aluminum, providing superior strength and heat dissipation compared to the stock plastic component. The CNC machining process ensures tight tolerances for a precise fit and leak-free operation. The candy teal powder coat finish not only enhances corrosion resistance but also adds a striking visual upgrade to your engine bay. The integrated coolant port with a removable plug allows for flexible coolant system configurations, accommodating additional sensors or coolant lines as needed.

Installation & Fitment

The Wehrli WCFab X Fleece Thermostat Housing is designed as a direct bolt-on replacement for the OEM thermostat housing on compatible Dodge and Ram trucks with 5.9L and 6.7L Cummins engines. Installation requires no modifications and can be completed with basic hand tools. It is recommended to replace the thermostat and gasket during installation to ensure optimal cooling system performance and prevent leaks. This part fits the following models and years:

• 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

What's Included

• Wehrli WCFab X Fleece Thermostat Housing (Candy Teal Powder Coat)
• Integrated coolant port plug
• Installation hardware (if applicable)
• Detailed installation instructions

Ideal For

This thermostat housing is perfect for diesel truck owners and enthusiasts who want to upgrade their cooling system components with durable, high-quality parts that improve both function and appearance. It is especially suited for those running other WCFab or Fleece Performance upgrades, or anyone seeking a reliable replacement for the OEM thermostat housing prone to cracking or leaking. Whether building a daily driver, tow rig, or show truck, this thermostat housing offers a smart, stylish solution.

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.