You should monitor head temperature, oil temp means almost nothing
There is a hose that runs from the radiator to the front of the engine block (front of the vehicle). Where the hose enters the engine, the temperature sender unit is threaded into the block. It has an electrical connector attached to it. To the best of my knowledge, this is the only temperature sender. Best...
On the passenger side of engine, on side near back. It's hard to see, and probably the best way to remove is to lay on top of the engine and work blind, by 'feel'. The sender is connected w/ an 'L' shape connector.
There are three temperature sensors on a 95 Previa engine. They are located on the left front side of the engine. The lower one is somwhat accessable from under the vehicle but access to the other two will require removal of the passenger seat and the access cover under the seat. A Haynes manual is the best way to go about getting info.
Could be the temperature sensor on the water pipe in engine or the guage it self. Best to replace the sender first but check to see if guage is working by grounding an earth and live to the wiring .
In most cases it is 195-205 degrees F. This is the temperature at which an internal combustion engine performs it's best. And the faster the engine reaches this temperature the better.
In a dry room temperature space.
I think the best way to find out is to go to the nearest Saturn dealer and ask the auto department where it is located. They won't charge you for location of part.
Your engine will get the best mileage at full operating temperature. If the thermostat is removed or too low a temperature unit the engine will use more fuel.
The engine may cut out when the temperature rises because the engine could be overheating. It is best to have a mechanic inspect the car and make any necessary repairs.
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It's depends on the location of the country. 260 C in our country(Bangladesh)
To the best of my knowledge, anywhere between 170 and 230 degrees fahrenheit.