Product Description
Upgrade the cooling system reliability and engine bay appearance of your Duramax with the WEHRLI CUSTOM FAB WCF100645 OEM PLACEMENT COOLANT TANK KIT. Designed for 2001-2007 LB7, LLY, and LBZ Duramax trucks, this premium upgrade replaces the factory plastic coolant reservoir with a durable fabricated aluminum tank while retaining the OEM mounting location for a clean factory-style installation.
Factory coolant reservoirs on early Duramax trucks are known for becoming brittle over time, leading to cracks, leaks, and potential overheating issues. Wehrli Custom Fabrication engineered this aluminum coolant tank kit to solve those problems permanently. The precision-welded aluminum tank provides improved durability, better heat resistance, and long-term reliability compared to the stock plastic unit.
This kit includes a fabricated aluminum expansion tank, billet mounting brackets, and all required hardware to install directly in the factory location. The result is a stronger coolant system component that maintains OEM function while enhancing the overall look of your Duramax engine bay.
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Key Features
- Replaces failure-prone factory plastic coolant reservoir
- Fabricated aluminum coolant expansion tank for long-term durability
- Maintains OEM mounting location for factory fitment
- Improves engine bay appearance with performance styling
- Designed and manufactured by Wehrli Custom Fabrication
- Direct bolt-on installation with included mounting hardware
- Compatible with factory cooling system components
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 LBZ
- 2007 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LBZ
- 2001-2007 GMC Sierra 2500HD / 3500HD 6.6L Duramax
Frequently Asked Questions
Why upgrade the factory coolant tank?
The factory plastic coolant reservoir on early Duramax trucks often becomes brittle and prone to cracking over time. This aluminum upgrade eliminates those common failure points.
Does this coolant tank install in the factory location?
Yes. The Wehrli WCF100645 coolant tank kit is designed to mount directly in the OEM position using the included brackets and hardware.
Will this work with the stock radiator and hoses?
Yes. The kit is designed to integrate with the factory cooling system components including radiator hoses and overflow connections.
Is fabrication required to install this kit?
No fabrication is required. The kit is designed as a direct bolt-on replacement for the factory coolant reservoir.
Does this improve engine bay appearance?
Yes. The fabricated aluminum construction gives your Duramax engine bay a clean performance look compared to the factory plastic tank.
Specifications for WEHRLI CUSTOM FAB WCF100645
| Specification | Details |
|---|---|
| Brand | Wehrli Custom Fabrication |
| Part Number | WCF100645 |
| UPC | Not Listed by Manufacturer |
| GTIN | Not Listed |
| Shipping Weight | Approximately 6 lbs |
| Package Dimensions | 14 x 10 x 10 inches |
| Shipping Method | UPS / FedEx Ground |
| Prop 65 Warning | This product may contain chemicals known to the State of California to cause cancer or reproductive harm. For more information visit https://www.P65Warnings.ca.gov |
