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Old 05-05-2005
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Help with operating temp ?

any body know what the normal Operating Temp is for a V6 4.0, 5 Speed with No AC ? (1992 Ranger ) Haynes says opening temp for the thermostat is 192 F I installed an aftermarket mechanical Temp gauge due to the instrument panel gauge failure. I'm reading about 194 f (90 C) on the gauge. Haynes says Fully open should be 226 F. Never seems to get there. The Truck runs just fine but I'm worried I may have a Thermostat problem. What do you think ?
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Old 05-05-2005
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Quote:
Originally Posted by Mootz
any body know what the normal Operating Temp is for a V6 4.0, 5 Speed with No AC ? (1992 Ranger ) Haynes says opening temp for the thermostat is 192 F I installed an aftermarket mechanical Temp gauge due to the instrument panel gauge failure. I'm reading about 194 f (90 C) on the gauge. Haynes says Fully open should be 226 F. Never seems to get there. The Truck runs just fine but I'm worried I may have a Thermostat problem. What do you think ?
Under normal conditions, your engine will run between about 190~200F when warmed up. A few degrees more in extreme conditions. You don't ever want to see 226F.
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Old 05-05-2005
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Quote:
Originally Posted by Mootz
Haynes says Fully open should be 226 F.
That's got to be a mis-print. At 226 degrees, your water wouldn't be a liquid anymore
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Old 05-05-2005
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a slight difference in temperatures is completely normal. two degrees wont make any difference.
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Old 05-05-2005
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Quote:
Originally Posted by FireRanger
That's got to be a mis-print. At 226 degrees, your water wouldn't be a liquid anymore
The boiling point of water increases with increased pressure, so it is possible to have liquid water at 226F in a pressurized system. Besides, the coolant is only about half water.
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Old 05-06-2005
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"You don't ever want to see 226F" I saw .. ( maybe Jeff/Rayjay can remember better then I ) close to 275 when I had that overheating issue going to Centralia this last time. Pegged the factory temp gauge. It was QUITE a display to see with the coolent steaming out of the resivor by the wiper fluid. The cap blew right open on it.

I ( like yourself ) have installed an aftermarket gauge. My engine now never sees anything over 200degrees ( gauge and digimoto/obd2 readings going/tested )

D.
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Old 05-07-2005
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Temperature range

It is in fact possible to have 226f water in a pressurized system, some vehicles operated at 212 f and above. But the trouble with mine is my normal operating temp is not getting to 190 F, it's running around 180 F and this seems a little screwy to me. Could it be just the aftermarket gauge isn't that accurate ? It just doesnt seem likely that it would run so cool (if you can call 180 F cool)
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Old 05-07-2005
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PRESSURIZEd !!

Quote:
Originally Posted by FireRanger
That's got to be a mis-print. At 226 degrees, your water wouldn't be a liquid anymore
Hate to tell you this but the whole purpose in a PRESSURIZED vehicle cooling sytem is to RAISE the boiling point of the water so the system can actually use it. Its called a closed system.
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Old 05-07-2005
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Quote:
Originally Posted by Mootz
It is in fact possible to have 226f water in a pressurized system, some vehicles operated at 212 f and above. But the trouble with mine is my normal operating temp is not getting to 190 F, it's running around 180 F and this seems a little screwy to me. Could it be just the aftermarket gauge isn't that accurate ? It just doesnt seem likely that it would run so cool (if you can call 180 F cool)
Your original post said you were running at 194F on the gauge. That sounded OK. But now you say the gauge is running around 180F and never gets to 190F.

???
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