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Wehrli WCFab Coolant Tank Billet Cap - Black Anodized is the exact radiator caps identified by manufacturer part number WCF100543. This listing was checked against WCFab's current manufacturer catalog under the catalog product name Billet Aluminum Coolant Tank Cap, Black Anodized. Confirm the complete part number, supported vehicle or dimensions, engine and emissions requirements, mounting position, finish, included components, and installation needs before ordering.
Key Features
- Rated at 18 to 20 PSI, the WCF100543 matches the pressure rating of the OEM coolant system without the failure risk associated with plastic OEM-style caps that degrade under repetitive heat cycles.
- The WCF100543 is rated at 18 to 20 PSI, which matches the operating pressure range of WCFab fabricated coolant tanks for Duramax and Cummins applications.
- WCFab produces coolant tanks, intake manifolds, intercooler piping, and accessories that are engineered, machined, and assembled in the USA.
- It is not intended as a direct-fit replacement for factory GM or Mopar plastic coolant reservoir caps.
- Using an undersized pressure cap can allow coolant to vent prematurely and affect cooling system performance.
- Plastic coolant caps degrade under repetitive heat and pressure cycling, especially in diesel applications that run higher cooling system pressures and temperatures.
Fitment
This component is selected by dimensions, connection size, mounting space, and system compatibility rather than broad year-make-model fitment.
Specifications
| Brand | Wehrli |
|---|---|
| Manufacturer Part Number | WCF100543 |
| Manufacturer Catalog Product | Billet Aluminum Coolant Tank Cap, Black Anodized |
| Product Type | Radiator Caps |
| Fitment Type | Universal |
| Condition | New |
What's Included
One new Wehrli radiator caps identified by manufacturer part number WCF100543, with only the components shown and expressly listed for this exact item.
About Wehrli
Wehrli Custom Fabrication develops high-performance diesel-truck intake, cooling, exhaust, suspension, and engine-bay components. Exact part-number and application verification are essential because configurations can differ across engines, cab and bed combinations, and model years.
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Frequently Asked Questions
Will Wehrli WCF100543 fit my vehicle?
Use the listed year and model where provided, then confirm the engine, cab, bed, chassis, drivetrain, emissions configuration, factory equipment, dimensions, and exact manufacturer part number.
What cooling-system details must I verify?
Confirm hose and port sizes, cap or sensor compatibility, mounting position, coolant specification, included fittings, and the required fill and bleed procedure.
What should be checked before installation?
Verify the complete parts list, mounting points, hose and wiring routes, clearances, fastener torque, fluid or air connections, and the current manufacturer service procedure.
Installation
Install according to the current Wehrli instructions and the vehicle service information. Confirm clearances, routing, fastener torque, fluid or air sealing, sensor connections, alignment where applicable, and safe operation before driving.
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