I requested they use only Motorcraft thermostat, because I knew there was a part # update. Threw the updated Motorcraft one in and it solved the issue.
Soon as i bought Motorcraft all was normal again
Make sure you use the motorcraft thermostat.
Go with the Motorcraft thermostat as it has a rubber seal on the outside edge.
I work at a Honda dealership in the mechanic field, and I would recommend the OEM thermostat, unless you have a rebuilt engine.
Stop using cheap thermostats. Get an oem honda unit and it will last and work correctly.
Your temp gauge is reading low because your mechanic is not using an OEM Honda thermostat. An OEM thermostat is designed specifically for your engine and the car will warm up quickly and the temp gauge will sit at the 50 yard line in any weather.
The Honda thermostat opened probably 50% more than the aftermarket, so lesson learned there.
Car takes forever to warm up and seems to always be running rich, so I'm guessing either the thermostat or ECT, or both, is/are bad.
I’ve had a Motorcraft thermostat fail after 100mi on my Ford
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