Review on Sierra International 18-1989K White 🌡️ Thermostat Service Kit: Optimal Cooling System Maintenance by Jonathan Brendemuehl

Name: Sierra International 18-1989K White 🌡️ Thermostat Service Kit: Optimal Cooling System Maintenance
Item: Sierra International 18-1989K White 🌡️ Thermostat Service Kit: Optimal Cooling System Maintenance
Rating: 5

September 12, 2022

Great for thermostats

I bought these gaskets for a 1996 Mercruiser 4.3LX engine. In my case, it's best to use a white plastic thermostat sleeve. Also included is a blue sleeve that is slightly shorter so should fit other models. Installed a new Sierra thermostat and used these gaskets, everything works great.

Pros

Few competitors

Cons

Mostly OK but...

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