SIERRA 18-3649 Thermostat – 160 Degree Fresh Water Cooling

Don’t sacrifice performance by running the engine too hot or too cold

A failed thermostat can cause an engine to run at the wrong temperature adversely affect performance and efficiency. The fix can be as simple as replacing the thermostat. Sierra engineered this thermostat to meet or exceed the specifications for many GM based applications that require a 160° operating temperature (1987 and newer with standard cooling systems).

For 50 years Sierra has been producing parts engineered to meet or exceed the specifications of marine engine manufacturers and has gained the confidence of engine manufacturers and boat builders. Boaters and technicians can be assured a Sierra part will fit right the first time and restore function to OEM specifications.

Key Features

• Thermostat meets or exceeds manufacturer specifications
• Compatible with 1997 and new GM based engines with standard cooling systems
• Temperature rating of 160°
• For use with fresh water cooling systems

The Sierra Engine Parts Selector

In addition to thermostats, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see our Engine Parts Selector, where you can search by engine make, serial number and model or year of manufacture.