Quote:
Originally Posted by larry perkins
hey guys, the thermostat is closed when cold, coolant circulates thru the block, warms engine,thermostat opens,closes port so coolant can now circulate thru the radiator. you remove a thermostat and the engine should run hot because the block port never closes.
correct me if i am wrong
larry perkins lou ky
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Yes, Thermostat is closed when the engine is cold, but there in no port that closes when the t-stat opens. There is a bypass port that allows coolant around the t-stat, but if the t-stat remains closed, like when they fail, the bypass port is not big enough to allow full coolant flow, resulting in an overheat. A missing, or failed open t-stat does not allow the engine to warm up to normal operating temp on cold days because the cold coolant in the radiator is in full flow at all times when the engine is running. A cold t-stat blocks this flow until the coolant heats up enough for the t-stat to open.
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RRGrassi
70's Southern Pacific #5608 Fairmont A-4 MOW car
13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.
99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K
90 Dodge D250 5.9 Cummins/5 speed. 400K
Gone and still missed...1982 w123 300D, 1991 w124 300D
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