Description
The Sierra Marine 18-3668D Marine Series Thermostat is a 142°F replacement engine thermostat designed for compatible 1983 and newer GM V6 and V8 marine engines with standard cooling systems. Constructed from copper and stainless steel, it includes the required gasket/O-ring and is supplied in display packaging.
Designed for marine engine cooling applications, this replacement thermostat provides accurate fit and function while meeting or exceeding the original equipment part it replaces.
Features
- Marine Series replacement thermostat
- Fits compatible 1983 and newer GM V6 and V8 engines
- Designed for standard cooling systems
- 142°F temperature rating
- Copper and stainless steel construction
- Gasket/O-ring included
- Display-pack configuration
- Designed for accurate fit and function
- Manufactured from high-quality materials
- Designed to meet or exceed the original equipment part it replaces
- Approximately 1-hour estimated installation time
Specifications
- Brand: Sierra Marine
- Manufacturer Part Number: 18-3668D
- Series: Marine Series
- Product Type: Engine Thermostat
- Engine Compatibility: 1983+ GM V6 and V8 Engines
- Cooling System: Standard Cooling
- Temperature Rating: 142°F
- Flow Type: Standard
- Material: Copper / Stainless Steel
- Gasket/O-Ring: Included
- Packaging: Display Pack
- Estimated Installation Time: 1 Hour
- Condition: Brand New
- Product: Genuine Sierra Marine Product
What’s Included
- Sierra Marine 18-3668D thermostat
- Gasket/O-ring
Compatibility
Designed for compatible:
- 1983 and newer GM V6 marine engines
- 1983 and newer GM V8 marine engines
- Applications equipped with standard cooling
Important Fitment Information
GM V6 and V8 marine engines can use different thermostats depending on engine configuration and cooling system. Confirm that the application requires a 142°F thermostat for a standard cooling system before ordering.
Verify Sierra Marine manufacturer part number 18-3668D against the existing thermostat or application information to confirm compatibility.
Important
- Rated at 142°F.
- Designed for standard cooling applications.
- Copper and stainless steel construction.
- Gasket/O-ring is included.
- Supplied in display packaging.
- Intended for compatible 1983+ GM V6 and V8 marine engines.
Warranty
Backed by a limited 2-year manufacturer warranty.
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