Wehrli WCFab Thermostat Housing

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

Part #: WCF100157-BR

Overview

The Wehrli WCFab X Fleece Thermostat Housing is a premium direct replacement upgrade designed specifically for Dodge Ram 2500 and 3500 models equipped with 5.9L and 6.7L Cummins diesel engines from 1998 through 2018. This thermostat housing replaces the factory OEM part (68145495AA) with a more durable and visually appealing solution that enhances both engine cooling efficiency and under-hood aesthetics. Ideal for diesel enthusiasts looking to improve coolant routing flexibility and complement other performance upgrades, this housing is a smart choice for maintaining optimal engine temperatures under demanding conditions.

Featuring a built-in port with a plug, the housing allows for customizable coolant line configurations, enabling tailored setups for enhanced cooling system performance. Its vibrant Bengal Red powder coat finish not only provides corrosion resistance but also adds a striking visual accent that pairs perfectly with other WCFab components such as upper coolant pipes, intake kits, and intercooler piping.

Key Features

This thermostat housing offers a range of features designed to improve durability, functionality, and style:

• Direct OEM replacement for part number 68145495AA, ensuring perfect fitment and compatibility
• Compatible with 1998–2007 Dodge Ram 2500/3500 5.9L Diesel and 2008–2018 Dodge Ram 2500/3500 6.7L Diesel models
• Integrated coolant port with plug for customizable coolant routing options
• High-quality powder-coated finish in Bengal Red for corrosion resistance and enhanced appearance
• Designed to complement other WCFab cooling and intake upgrades for a cohesive engine bay look
• Precision-engineered to maintain proper thermostat function and coolant flow
• Robust construction to withstand high temperatures and harsh diesel engine environments

Construction & Design

The Wehrli WCFab thermostat housing is crafted from premium materials engineered for strength and longevity. Its robust construction ensures reliable performance under the intense heat and pressure typical of heavy-duty diesel engines. The housing is precision-machined to meet or exceed OEM specifications, guaranteeing a seamless fit and proper sealing to prevent leaks.

The powder-coated Bengal Red finish not only enhances corrosion resistance but also provides a durable surface that resists chipping and fading. This attention to detail ensures the housing maintains its vibrant appearance even after extended use in demanding conditions.

Installation & Fitment

Installation of the Wehrli WCFab thermostat housing is straightforward, designed as a direct bolt-on replacement for the factory unit. No modifications or special tools are required, making it suitable for professional installers and experienced DIY enthusiasts alike. The housing fits all listed Dodge Ram 2500 and 3500 models with 5.9L and 6.7L Cummins diesel engines from 1998 to 2018, ensuring broad compatibility across multiple model years.

What's Included

• Wehrli WCFab X Fleece Thermostat Housing in Bengal Red
• Coolant port plug for customization
• Installation hardware (where applicable)
• Detailed installation instructions

Ideal For

This thermostat housing is ideal for Dodge Ram diesel owners seeking a durable, high-quality replacement part that improves coolant system flexibility and enhances engine bay aesthetics. It is especially suited for enthusiasts upgrading their cooling system components or those performing maintenance on older trucks who want a reliable and visually appealing solution. Whether you are building a performance-oriented Cummins diesel or maintaining a daily driver, this housing offers a perfect blend of form and function.

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.