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Old 06-17-2015, 02:29 PM   #1
saturncrystal
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Wink over heating issues


hi everyone. I NEED HELP. lol. so my saturn sc1 2002 keeps over heating I have replaced the thermostat, it still did, so then we replaced the water pump and radiator along with new belt and also new coolants, it is still getting hot, what should i try next??? thank you in advance for your help, i truly appreciate it.

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Old 06-17-2015, 07:14 PM   #2
derfderf
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1) is aux cooling fan coming on when the temp gauge hits near the beginning of the red on the temp indicator? On that subject, does it EVER turn on?

2)have you ever changed out the ECTS (engine coolant temp sensor) with a brass style replacement?

3)Is the air dam in the front of the car still there?
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To test the fan, engage the AC -- the fan should kick in and remain on while the AC is on.
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remove the squeeze connector on the ECTS and measure its resistance both cold (pre - start) and when hot. The car's PCM keys off the reading from this sensor to turn on the aux cooling fan when the AC is NOT on. Bad ECTS usually leads to the fan never being commanded on by the PCM as the reading is often the equiv of -40 degrees all the time.
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If never swapped, source brass ECTS and connector from a GM dealer. Aftermarket ECTSs often have issues with calibration.
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The air dam directs air up towards the radiator to aid in cooling. You will likely encounter issues in summer if you live in a hot climate and the air dam is not present or the springs on it are not holding it downwardsw. You can pick one up in a junkyard
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Old 06-17-2015, 09:35 PM   #3
saturncrystal
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The Fan Seems to be working correctly the dam is in place. I am going to test the new Thermostat next because we replaced it first and it overheat when the new thermostat was in place
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Old 06-18-2015, 01:43 AM   #4
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you did not answer the question about the ECTS swap nor the resistance measurements.

The ECTS and the thermostat are different things -- let's be sure we're talking about the same thing.

If you're referring to the actual thermostat, I'd use a Stant 14279 188 degree thermostat. 188 is the OE requirement.

Where on the temp gauge does the fan kick in with the a/c off?
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Old 06-18-2015, 06:35 AM   #5
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Please stop by the New Member section to introduce yourself.
While youre at it, please go into the User CP at the top. You will see on the left side "edit signature". Click that, and add your name and car type so we can help in the future as well.

A running Saturn is a happy Saturn
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Old 06-23-2015, 05:46 AM   #6
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Use only an OEM Saturn thermostat, the parts store ones tend to let the 1.9 run hotter than it should.
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Old 07-06-2015, 06:41 AM   #7
HIDEAWAY95
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Could be the radiator cap.
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Old 07-08-2015, 07:20 AM   #8
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if you ever come back AND take the advice given here AND still have an issue, go get the system pressure tested.
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Old 06-29-2017, 08:54 AM   #9
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Pressure test is good idea.
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