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MotoradPart #: 7426-190
Motorad 7426-190 Engine Coolant Thermostat
54 vehicles fit this part
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Fail-Safe
Fitment: Dodge and Ram, 2500, 3500, 4000, Ram 2500, and Ram 3500
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Motorad Fail-Safe Thermostat for Ram Cooling Systems
Motorad Fail-Safe thermostat Part Number 7426-190 is an engine coolant thermostat built for OE-specified temperature control in demanding cooling systems. It is a direct-fit cooling system service part for select Ram 2500, Ram 3500, and Ram 4000 applications, with a 192 degree F opening temperature and included rubber seal.
Key Features
- Fail-Safe design locks open if overheating occurs, allowing coolant flow to continue
- OE supplier construction with OEM quality materials and manufacturing processes
- Copper case and wax compound for responsive temperature changes in coolant
- 192 degree F temperature rating for OE-specified thermal control
- Offset design with air relief valve and jiggle pin weep hole
- Includes one rubber gasket/seal
- Sealing flange outside diameter: 2.28 in
- Bypass diameter: 1.14 in; bypass length: 1.10 in
- Flange thickness: 0.05 in
Product Details
The Motorad Fail-Safe line is engineered for drivers who need a thermostat that responds quickly and maintains coolant regulation under load. This 7426-190 thermostat uses a copper case and wax compound to react to temperature changes, while the offset design and air relief valve help support proper coolant circulation during service. It is a practical choice for Ram cooling system repair where OE-style temperature control and seal fitment matter. This part cross-references Monroe Shocks & Struts (e.g., 74261, 97426190) for the same application.
What It Helps Address
- Engine overheating caused by a thermostat that no longer opens correctly
- Coolant temperature instability during towing, hauling, or stop-and-go driving
- Restricted coolant flow from a worn thermostat assembly
- Coolant seepage at the thermostat sealing surface when the seal is damaged
- Delayed warm-up or incorrect operating temperature in Ram cooling systems
Installation Notes
Verify the OE-specified temperature and housing dimensions before installation. Replace the thermostat with the included seal, clean the mating surfaces thoroughly, and confirm the jiggle pin weep hole and air relief valve are oriented as required by the application. This part is listed for Fits 1998-2010 Dodge Ram 2500, N/A; Fits 1998-2010 Dodge Ram 3500, N/A; Fits 2011-2020 Ram 2500, N/A; Fits 2011-2020 Ram 3500, N/A; Fits 2011-2013 Ram 4000, N/A.
Quality Assurance
Motorad manufactures this thermostat to OEM specifications and processes as an OE supplier, using materials selected for demanding automotive cooling systems. The Fail-Safe design adds a built-in open position response in the event of overheating, supporting dependable service in Ram 2500 and Ram 3500 cooling system repairs. Part Number 7426-190 is built for consistent OE-style fit and thermal control.
| Brand | Motorad |
|---|---|
| Part Number | 7426-190 |
| Position | Fail-Safe |
| Sealing Flange Outside Diameter | 2.28 |
| Gasket Or Seal Included | Yes |
| Jiggle Pin Weep Hole | Yes |
| Bypass Diameter | 1.14 in |
| Bypass Length | 1.10 in |
| Flange Thickness | 0.05 in |
| Gasket/Seal Material | Rubber |
| Gasket/Seal Material | Rubber |
| Installation Tool Included | No |
| Number Of Seals | 1 |
| Temperature | 192 deg. f |
| Temperature (Degree) | 192 |
This part fits 54 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2020 | Ram | 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2020 | Ram | 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2019 | Ram | 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2019 | Ram | 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2018 | Ram | 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2018 | Ram | 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2017 | Ram | 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2017 | Ram | 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2016 | Ram | 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2016 | Ram | 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2015 | Ram | 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2015 | Ram | 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2014 | Ram | 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2014 | Ram | 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2013 | Ram | 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2013 | Ram | 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2013 | Ram | 4000 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2012 | Ram | 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2012 | Ram | 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2012 | Ram | 4000 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2011 | Ram | 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2011 | Ram | 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2011 | Ram | 4000 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2010 | Dodge | Ram 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2010 | Dodge | Ram 2500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2010 | Dodge | Ram 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2009 | Dodge | Ram 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2009 | Dodge | Ram 2500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2009 | Dodge | Ram 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2008 | Dodge | Ram 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2008 | Dodge | Ram 2500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2008 | Dodge | Ram 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Dodge | Ram 2500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Dodge | Ram 2500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Dodge | Ram 3500 | 6.7L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2007 | Dodge | Ram 3500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2006 | Dodge | Ram 2500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2006 | Dodge | Ram 3500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2005 | Dodge | Ram 2500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2005 | Dodge | Ram 3500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2004 | Dodge | Ram 2500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2004 | Dodge | Ram 3500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2003 | Dodge | Ram 2500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2003 | Dodge | Ram 3500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2002 | Dodge | Ram 2500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2002 | Dodge | Ram 3500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2001 | Dodge | Ram 2500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2001 | Dodge | Ram 3500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2000 | Dodge | Ram 2500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 2000 | Dodge | Ram 3500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 1999 | Dodge | Ram 2500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 1999 | Dodge | Ram 3500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 1998 | Dodge | Ram 2500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
| 1998 | Dodge | Ram 3500 | 5.9L | L6 | N/A | "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."; Temperature 190F; Includes seal; OE Specified Temperature; Fail-Safe |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
7426-1907426197426190NIP7426-190SS195-6247
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.