The newer cars use a 2 stage thermostat that circulates the coolant around the head, then block before it goes into the radiator. Most newer cooling systems are designed for the tstat and it aids in flow. You can usually get a cooler one or drill some holes in it to make it weaker so to speak.
Quote:
Originally Posted by MetroMPG
It would still take longer to warm up if you remove the coolant thermostat because you have to warm up a larger volume of circulating coolant rather than a small volume of non-circulating.
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