Sierra Thermostat Kit 18-3670 for OMC 2.5L and 3.0L
- Brand:
- Sierra
- Part no:
- 18-3670
Where to buy
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This is Sierra's thermostat kit, part number 18-3670, meant for OMC engines of 2.5L and 3.0L size. It is described as a T-Stat kit, with the fit given as the OMC 140 for 1980-81, plus 2.5l and 3.0l engines for 1982-88. Sierra's own catalog is the place for complete application information, so check your engine against it before relying on those year ranges. No opening temperature is stated for this kit.
Our take
The kit is tied to OMC engines of 2.5l and 3.0l, with the OMC 140 named for 1980-81. That is a narrow fit, so match your engine's size and year against Sierra's catalog before treating it as a drop-in. The opening temperature is not given, so compare it with your original thermostat.