The 1992 Ford Ranger 4.0 liter had a 197 * Fahrenheit thermostat from the
factory
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 ?
yes if the motors are the same.
The thermostat is done it has to be replaced.......
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To change that thermostat you need to follow the top radiator hose to the motor from the radiator. It will lead to the thermostat housing on the block. The housing will be anchored with (2) bolts to the block (I think). Take the housing off and the thermostat is housed inside.you will have to replace it with a manufactured suggested thermo(probably 180* or 200 degree thermo).
this was not helpful for me
is in side of the rear main fiuse box