Sierra Thermostat 18-3550 (Stat Only)
- Brand:
- Sierra
- Part no:
- 18-3550
Where to buy
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Sierra 18-3550 is a thermostat sold on its own, marked as stat only and cross-referenced to 59078. Treat it as the thermostat by itself. The maker's name for it is Sierra Thermostat 59078 (Stat Only). Nothing further about its opening temperature or the engines it fits is stated, so confirm both against your engine's service information before fitting it.
Our take
The 18-3550 is marked Stat Only, so treat it as the thermostat by itself. If your old thermostat sat in a housing that needs a gasket, source that separately. No opening temperature is given, so check it against your engine's specification.