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Sierra International 18 3649 Thermostat 160° Review

2

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Average

Revainrating 3.5 out of 5  
Rating 
3.7
🌡️ Engine Cooling & Climate Control, 🛠️ Replacement Parts

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Media

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img 1 attached to Sierra International 18 3649 Thermostat 160°
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img 4 attached to Sierra International 18 3649 Thermostat 160°

Description of Sierra International 18 3649 Thermostat 160°

Designed for freshwater cooling. Fits GM engines with standard cooling requiring a 160° thermostat (1987 and newer). Interchangeable with Crusader 97895, GLM 13100, Mallory 9-43002, and Mercruiser Stern Drive 8052732, 8072522, 807252T2, 8M0091470, 8M0109441. Temperature Rating: 160°F. Each Sierra product meets or exceeds the original equipment part it replaces.

Reviews

Global ratings 2
  • 5
    1
  • 4
    0
  • 3
    1
  • 2
    0
  • 1
    0

Type of review

Revainrating 3 out of 5

Temperature Woes for my opinion

Using this thermostat, our team found that it consistently failed to regulate the engine's temperature. While installation was fairly straightforward, the poor performance of this product left us struggling with overheating issues on multiple occasions..

Pros
  • Easy installation
Cons
  • Inconsistent temperature regulation

Revainrating 5 out of 5

Overheats at idle

A 1996 Baja Islander 180 with a 4.3LX engine overheats at idle. It had a new sub-block water impeller and idled to just over 200 degrees. Anything over idle and the temperature dropped quickly. I replaced the thermostat with this Sierra 160 degrees and the problem was solved. Now the temperature regulates itself normally.

Pros
  • Pretty packaging
Cons
  • Negative impression