Quote:
Originally Posted by jacob smith
Ok but if the thermostat has the bled holes in it should it close tight? And would the fact that thermostat is full open at around 165 and the other matching one is fully open at 175 mean that this one is bad. Or am I misunderstanding you
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They don't have to close tight like a valve, .020 or .030 gap on one side isn't going to leak that much coolant. I would question trying to see EXACTLY when they open in a pan of water??? Put them on the engine, run them and check the temperature on the head outlets with a laser pointed thermometer. You can swop thermostats from side to side to see the true picture. G.M.