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Review on Sierra International 18 3653D Marine Thermostat by Matt Venable

Revainrating 5 out of 5

Perfect fit for my 1999 Volvo-Penta 5.0 GL

When I first started the engine in my backyard in 2018 I noticed the engine temperature drop. Hand pressure on the rabbit's ears increased the water pressure and allowed the old thermostat to open and adjust. I decided it was time to replace the sticky (and rusty) 4 year old thermostat. I ordered the Sierra kit and received it in a few days. The kit included an o-ring and gasket for my application. Calm is restored.

Pros
  • Includes (1) Thermostat Housing Gasket 18-2858, (1) Thermostat Gasket 18-2947, (1) Thermostat 18-3554, (1) O-Ring 18-7170, (1) 18 -0929 Thermostat Gasket and (1) 18-0398 Thermostat Gasket
Cons
  • Clean