Thermostat

zwhugheszwhughes Member Posts: 3
edited September 2015 in Chevrolet
New radiator, new water pump, new thermostat....after sitting for cpl hours temp has to reach 260 before thermostat opens...after that it happens at 195......until it sits and cools then back 260 again for thermostat to open....why is it doing that.....any thoughts?????
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