/live/media/ZO/ZO_34308_Ang.jpg)
Will it fit your vehicle?
Confirm before you buy. Free return shipping if it doesn't fit.
Gates 34308 Engine Coolant Thermostat
| Brand | Gates 34308 |
|---|---|
| Material | Steel, copper |
| Sealing Flange Outside Diameter | 2.85 |
| Height Between Flanges | 1.15 |
| Design | Bottom by-pass |
| Type | Heavy-duty thermostat |
| Height | 2.32 |
| Gasket Quantity | 0 |
| Jiggle Pin Weep Hole | No |
| Seal Type | O-ring |
| Start to Open Temperature | 180 |
| Start to Open Temperature | 82 |
| Installation Tool Included | No |
| 9813 | 1.34 |
| 9841 | 1 |
| 9852 | 0 |
| 9907 | 1.17 |
| By-Pass Flange Diameter (in) | 1.34 |
| Design | Bottom by-pass |
| Height from Flange (in) | 1.17 |
| Includes Installation Tool | No |
| Material | Steel, copper |
| Number of Gaskets | 0 |
| Number of Jiggle Pins/Check Valves | 0 |
| Number of Seals | 1 |
| Fits | — |
Heavy-duty thermostat. Built for demanding cooling systems with steel and copper construction.
Bottom by-pass design. Supports efficient coolant flow through the thermostat assembly.
O-ring seal. Provides a secure, leak-resistant seal.
Cross-references Bosch 15218, Eastern Catalytic 30448 and Gates 34308 for the same application. See all 10.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Heavy-Duty Engine Cooling Control
The Gates 34308 Heavy-Duty Thermostat is built for demanding cooling systems in trucks, buses, tractors, and heavy equipment. It uses a steel and copper construction with an O-ring seal and a bottom by-pass design to help regulate coolant flow in high-vibration environments.
For buyers searching for a heavy-duty engine coolant thermostat for commercial and off-road service, Gates 34308 delivers a direct-fit cooling system service part with an 180-degree start-to-open temperature.
Key Features
- Heavy-duty engine coolant thermostat for severe-duty cooling applications
- Bottom by-pass design for the specified cooling system layout
- Steel and copper construction for durability in harsh underhood conditions
- O-ring seal type for a secure thermostat housing seal
- 180°F start-to-open temperature for controlled coolant circulation
- Gates Heavy-Duty Thermostat line engineered for noise, vibration, and harshness resistance
Product Details
Gates 34308 is part of the Green Stripe Heavy-Duty Thermostat line, a product line focused on commercial-duty cooling performance. This thermostat is designed for engines that operate under constant load and repeated thermal cycling, where stable coolant control matters. The steel and copper build, bottom by-pass configuration, and O-ring sealing design support reliable service in heavy-duty truck, bus, tractor, and equipment cooling systems.
This part cross-references Bosch 15218 for the same application.
Common Cooling System Issues It Can Address
- Engine running too cool or taking too long to reach operating temperature
- Temperature fluctuation caused by a worn thermostat
- Coolant flow control problems in a bottom by-pass thermostat housing
- Seal leakage at the thermostat housing interface
- Cooling system service needs on heavy-duty truck, bus, tractor, and equipment engines
Installation Notes
Verify the thermostat housing design, by-pass configuration, and start-to-open temperature before installation. Clean the sealing surfaces thoroughly and inspect the O-ring seat for corrosion or debris. This thermostat does not include an installation tool, and it uses no gasket.
Quality Assurance
Gates designs the Green Stripe Heavy-Duty Thermostat line for the vibration, heat, and load demands found in commercial and off-road service. Gates 34308 is built to meet the needs of heavy-duty cooling systems where consistent thermostat operation is required.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| No rows match your filter. | ||||