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Gates 33915 Engine Coolant Thermostat
| Brand | Gates 33915 |
|---|---|
| .71 | |
| 1 | |
| 1 | |
| Design | Reverse Poppet Bottom-Blocking By-Pass |
| Design | Reverse Poppet Bottom-Blocking By-Pass |
| Gasket Quantity | 0 |
| Height | 1.66 |
| Height Between Flanges | .95 |
| Height from Flange (in) | .71 |
| Includes Installation Tool | No |
| Installation Tool Included | No |
| Jiggle Pin Weep Hole | Yes |
| Material | Steel, Brass |
| Material | Steel, Brass |
| Number of Gaskets | 0 |
| Number of Jiggle Pins/Check Valves | 1 |
| Number of Seals | 1 |
| OE Comparison Rating | OE Performance |
| Seal Type | O-Ring |
| Sealing Flange Outside Diameter | 2.12 |
| Start to Open Temperature | 88 |
| Start to Open Temperature | 190 |
| Type | OE Type Thermostat |
| Product line | OE Type Thermostat |
| Fits | Ram and Dodge · 55 vehicles |
OE type thermostat. Provides precise temperature control with OEM-equivalent fit.
Steel and brass construction. Built with durable materials for reliable cooling performance.
Reverse poppet design. Bottom-blocking by-pass helps manage coolant flow efficiently.
Cross-references AMS Automotive 4289, Four Seasons 33915 and Motorad 426-190 for the same application. See all 15.
Gates OE Type Thermostat for Ram and Dodge
The Gates OE Type Thermostat 33915 is built for precise engine coolant temperature control and a leak-free OEM-equivalent fit. It is a direct replacement thermostat for select Ram 2500 and Ram 3500 trucks, including 190-degree applications.
- OE Type Thermostat for factory-style cooling system performance
- Start to open temperature: 190°F / 88°C
- Reverse poppet bottom-blocking by-pass design
- Steel and brass construction
- O-ring seal type with one jiggle pin weep hole
- OE Performance comparison rating
- Gates part number 33915
OE Type Thermostat Design
Gates OE Type Thermostats are engineered for accurate temperature regulation in demanding cooling systems. This thermostat uses a reverse poppet bottom-blocking by-pass design, a steel and brass body, and an O-ring seal to support consistent sealing and stable coolant flow. The Gates 33915 is a practical OE-style replacement for Ram and Dodge truck cooling service where factory temperature control matters.
Compatible With 2021-2025 Ram 2500 and Ram 3500, as well as 2013-2020 Ram 2500 and Ram 3500 with 190-degree OE temperature applications. It also fits 1998-2009 Dodge Ram 2500 and Dodge Ram 3500 models listed for this thermostat specification. This part cross-references Four Seasons 33915 for the same application.
Common Cooling System Issues
- Engine running cooler or warmer than the specified operating range
- Slow warm-up after cold starts
- Temperature fluctuation during towing or stop-and-go driving
- Coolant flow control problems caused by a worn thermostat
- Leak concerns at the thermostat sealing surface
Installation Notes
Verify the OE temperature specification before installation and confirm the housing and sealing surface are clean and free of corrosion. This thermostat uses an O-ring seal and does not include an installation tool. The jiggle pin weep hole should be oriented according to the vehicle service procedure during installation.
Quality Assurance
Gates designs OE Type Thermostats to deliver OEM-equivalent fit and precise temperature control for service replacement use. The 33915 is built to match the cooling system requirements of listed Ram and Dodge applications.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2025 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | OE Type Thermostat |
| 2025 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | OE Type Thermostat |
| 2024 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | OE Type Thermostat |
| 2024 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | OE Type Thermostat |
| 2023 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | OE Type Thermostat |
| 2023 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | OE Type Thermostat |
| 2022 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | OE Type Thermostat |
| 2022 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | OE Type Thermostat |
| 2021 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | OE Type Thermostat |
| 2021 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | OE Type Thermostat |
| 2020 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2020 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2019 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2019 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2018 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2018 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2017 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2017 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2016 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2016 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2015 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2015 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2014 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2014 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2013 | Ram | 2500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2013 | Ram | 3500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2009 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2009 | Dodge | Ram 2500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2009 | Dodge | Ram 3500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2008 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2008 | Dodge | Ram 2500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2008 | Dodge | Ram 3500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2008 | Dodge | Ram 3500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2007 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2007 | Dodge | Ram 2500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2007 | Dodge | Ram 3500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2007 | Dodge | Ram 3500 | 6.7L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2006 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2006 | Dodge | Ram 3500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2005 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2005 | Dodge | Ram 3500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2004 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2004 | Dodge | Ram 3500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2003 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2003 | Dodge | Ram 3500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2002 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2002 | Dodge | Ram 3500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2001 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2001 | Dodge | Ram 3500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2000 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 2000 | Dodge | Ram 3500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 1999 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 1999 | Dodge | Ram 3500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 1998 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
| 1998 | Dodge | Ram 3500 | 5.9L | L6 | DIESEL | N/A | 190 Degree; OE Temperature; Seal included; OE Type Thermostat |
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