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2004 Jeep grand Cherokee V8 what temp should the motor coolant be ? When the outside Temp gets down around 15deg or colder I get cold on my way to work about a 1/2 Hr drive. Coolant level is good, heater fan blows strong ,
Coolant temperature reading on dash is reading 190? what would a normal reading be ?
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It is related to the outside temp and the cold temp of the oil. Cold engines with cold oil will read a higher pressure. The pressure should go down to normal when operating temp is reached.
If you have verified that the dash temp gauge is correct by checking temp of coolant in radiator,yes your guess would be what i would change,the engine needs to have a 195degree thermostat in it.195 degrees is what the computer is programed to see as normal running temp.
Tried changing the fluid? Often gummy deposits get gummier when cold and take a while to free up with temp increase. Of course, if you are good at it, you can rebuild it but I'd try that first. Generally I use lucas conditioner with B&M or Amsoil synthetic fluid in mine...seems to do the job.
hi
there is no recall from jeep (there should be) your blend doors are damaged or broken. jeep will quote you around £800 to fix. log on to heatertreater.net they have a diy quick fix that will last the life of jeep. you can install the new blend doors that are metel (not stupid plastic ones jeep use) in around half an hour, this really does work as i have installed a few of these kits with no problems.
hope this helps
You didn’t mention replacing the temperature sensor located
on the block in the path of the ‘cooled’ coolant.
I can’t tell you any closer where to look for it since you
didn’t specify which engine you have.
This device is a solid state item called a thermistor.
With the air temperature around 77 degrees F and a 'cold' engine, it should
measure about 10,000 Ohms and hot, around 1,200 Ohms while disconnected from
its mating connector.
With the ignition on, and the connector disconnected from
the sensor, you should measure about 5 volts coming from the ECU.
If this has failed, the ECU is not getting the right info
back from the sensor and doesn’t know if the fan is needed or not.
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