Hey Guys.

Just did a Radiator Flush and Water Pump change, and figured I would replace the Thermostat. Bought the car 1,000 miles ago, and don't know when it was last changed. It's a Motorcraft so it might be the original.

So I did a test placing four thermostats in a bowl with boiling water. My old one, two new ones from the same brand, and a forth of a different brand. The old one in pic 1 opens. The new one in pic 2 from this Murry brand did not open, and this is the second Murry that...

2 Consecutive Bad Thermostats?