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Gates 34146 Engine Coolant Thermostat
| Brand | Gates 34146 |
|---|---|
| Material | Steel, copper |
| Sealing Flange Outside Diameter | 3.19 |
| Height Between Flanges | 1.44 |
| Design | Weir-stat |
| Type | Heavy-duty thermostat |
| Height | 3.2 |
| Gasket Quantity | 0 |
| Jiggle Pin Weep Hole | No |
| Seal Type | O-ring |
| Start to Open Temperature | 160 |
| Start to Open Temperature | 71 |
| Installation Tool Included | No |
| Flange Thickness | .16 |
| 9810 | 2.27 |
| 9841 | 1 |
| 9852 | 0 |
| 9907 | 1.6 |
| Design | Weir-stat |
| Flange Thickness (in) | .16 |
| Height from Flange (in) | 1.6 |
| Includes Installation Tool | No |
| Material | Steel, copper |
| Number of Gaskets | 0 |
| Number of Jiggle Pins/Check Valves | 0 |
| Number of Seals | 1 |
| Valve Diameter (in) | 2.27 |
| Fits | — |
Heavy-duty thermostat. Built to handle harsh underhood noise and vibration.
Weir-Stat design. Promotes steady coolant flow for consistent temperature control.
Steel and copper. Durable construction with an O-ring seal for a secure fit.
Cross-references AP Exhaust 38006, EXEDY OEM 15006 and Four Seasons 15008 for the same application. See all 24.
Heavy-Duty Engine Cooling Control
The Gates 34146 Heavy-Duty Thermostat is an engine coolant thermostat built for demanding underhood conditions in trucks, buses, tractors, and heavy equipment. Its steel and copper construction, O-ring seal, and Weir-Stat design support stable coolant flow control in high-vibration environments.
Gates Heavy-Duty Thermostat 34146 is a practical choice for service work where consistent temperature regulation matters. It is set to start opening at 160°F (71°C) and uses a flange-style design with a 3.19 in sealing flange outside diameter.
Key Features
- Part number: Gates 34146
- Heavy-duty thermostat for engine coolant systems
- Weir-Stat design for controlled coolant flow response
- Steel and copper construction
- Start to open temperature: 160°F / 71°C
- O-ring seal type for sealing at the housing interface
- No jiggle pin weep hole
- No installation tool included
- Valve diameter: 2.27 in
- Flange thickness: 0.16 in
Product Details
This Gates thermostat is part of the Heavy-Duty Thermostat line, which focuses on cooling-system durability in commercial and off-highway service. The Weir-Stat design helps regulate coolant movement as the engine reaches operating temperature, while the steel and copper build is suited to harsh vibration and noise conditions under the hood. If you are servicing a heavy-duty truck cooling system, bus cooling system, or tractor engine coolant circuit, Gates 34146 provides a direct replacement option for temperature control service.
This part cross-references Four Seasons 15008 and Motorad 4061-80 for the same application.
Common Problems It May Address
- Engine running too cool or taking too long to reach operating temperature
- Temperature fluctuation caused by a worn thermostat
- Coolant flow control issues in heavy-duty cooling systems
- Overheating concerns related to thermostat sticking or delayed opening
- Service replacement for aging thermostat housings and coolant circuits
Installation Notes and Tips
Verify the thermostat housing dimensions, sealing flange diameter, and temperature rating before installation. Clean the mating surfaces thoroughly and inspect the O-ring sealing area for corrosion or debris. Because no installation tool is included, use the correct service tools for your application and follow the vehicle manufacturer’s cooling-system procedure.
Compatible With heavy-duty truck, bus, tractor, and heavy equipment cooling systems. For vehicle-specific service searches, use Gates 34146 when looking for a heavy-duty engine coolant thermostat for commercial cooling repair.
Quality Assurance
Gates designs the Heavy-Duty Thermostat line for the vibration, noise, and harshness found in demanding underhood environments. The 34146 thermostat is built with steel and copper materials and a sealed O-ring design to support dependable cooling-system service.
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