Question about 1998 Saturn SL

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98 Saturn SL overheating

I have a 1998 saturn sl and I am having a few issues with. after driving the car 20+ miles and kill, it takes a while for it to start again (30-1hr) and then recently it begin to over heat, I changed the coolant fan relay and it still over heated. I was told that the thermostat sensor had a lot to do with this and before I go to the troble of changing the thermostat, I wanted to know what you think my problem might be

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Change the thermostat for the heating problems. As for the hard to start when hot, check your air filter. Change your fuel filter and check the fuel pressure. Check your engine ground connection. Check the connections in your ignition system. Change your idle control sensor. Could be any one or combination of the above.

Posted on Jun 21, 2009

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I know this is late....but in order to help others...
Most likely problem is the coolant temp sensor.
Easy fix too.
This sends info to the PCM to control many systems.
I had this happen 2x with our Saturns, and both times it was immediately fixed.
Problem could be the sensor itself or a corroded cap that attaches to its end.

Hope this helps someone.

Dean.

Posted on Feb 04, 2012

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I know this is an old post but for the benifit of others looking things up I post an additional note.

If you have been overheating it can be because of 1 of 4 things
Low coolant
Blockage either solid or air pocket
Stuck thermostat
Failed pump either belt slippage loose or failed barring or impeller damage

Rough or hard start especially when hot may be due to a failed temp sensor located on the upper driver side of engine. The computer thinks it cold and dumps too much fule in the system and floods it. Runs rough and smokes a bit. The excess fule can wash the oils from cylinder walls causing premature wear .This is the 2 wire sensor that you can get from most auto parts stores for 6 to 10 dollars and is easy to change out.

Posted on Jan 07, 2012

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Temp sensor just below thermo housing. I have seen this prob before.

Posted on Jun 21, 2009

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