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Simply bypass the cooling fan thermostat .G
To allow coolant circulation through the engine when the thermostat is closed.
I will assume that is in an automobile. A bypass hose goes around the thermostat in your cooling system to allow some coolant to flow whenever the engine is running. This prevents to much pressure to be built up in the system, allows for even cooling at start up and even gives you a slight amount of heat when you start the engine. Your heater core is often part of the bypass system in a car. When the engine's thermometer opens the flow of coolant in the car increases this cooling the engine. As the engine cools the thermostat closes slightly and increases the flow through the core and bypass hose.
Are You Talking About The Engine Coolant Thermostat. You Don`t Have To Bypass It, Just Take It Out And Throw it Away. Problem, If You Choose To Do So You Engine Will Not Run At The Desired Tempature. Winter Or Summer. Remove The Thermostat If You Are Having Problems With It. Install The Correct Tempature Rating One For Your Car. Also Install It The Correct Direction. From Your Question It May Be That You Have Installed Yours Backwards, If This Helps. Install The Thermostat With The Spring Side Toward The Engine . ie The Flow Of The Water Comming From The Engine By Way Of The Top Hose. Put The Spring Side Toward The Engine.
You CAN just remove it; but that introduces another set of problems. The computer monitors the engine temperature, and if the engine is not warming sufficiently the computer will start to report a fault. A cold engine does not perform as well, and if the thermostat is removed the engine will not be able to reach operating temperature. The thermostat restricts coolant flow into the radiator while the engine is cool. Once the engine warms to operating temperature, the thermostat opens, allowing excessive heat to be dissipated through the radiator. Removing the thermostat is NOT recommended and can significantly affect performance and engine wear.
When the thermostat is closed, the coolant circulates through the bypass hose from the water pump to the block.When the thermostat is closed, the coolant circulates through the bypass hose from the water pump to the block.
I assume you are talking about the engine thermostat. Looking at the engine from the front of the vehicle, look for the water pump where all the black cooling lines come together (will be on the front of the engine, almost at the top). There will be a small bypass hose about 6 inches long that runs from one side of a small dome housing to the other. Inside that dome housing is the thermostat.
The 2003 Subaru thermostat is located inside of the thermostat housing, on the front of the engine. The thermostat will be near the bottom of the engine.
Bypass
You can find the thermostat on the front of the engine. The thermostat will be inside of the thermostat housing.
There is supposed to be an engine thermostat . Do you mean that someone has removed the engine thermostat ? What year of Ford Ranger and what year ?
Engine thermostat is where your upper radiator hose hooks to the top of the engine