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Old 07-10-2007, 06:39 PM   #1
zoso007
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1994 SL2
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Default running temparture for 94 sl2

94 Sl2 m/t, where should the needle on the coolant gauge be at normal operating tempature. Mine seems to hang around half and when I idle for a little bit in traffic it starts creeping up to 3/4 and seems like it would keep going. Usually I try to turn off on to a different road then or park somewhere and turn the car off to cool down because I am afraid its going to go into the red. I replaced the thermostat and ECTS about 1000 ago.

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Old 07-10-2007, 06:43 PM   #2
TwinRevver
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Default Re: running temparture for 94 sl2

above 1/4 to 3/4 is ok 3/4 hash is cooling fan kick on

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Old 07-10-2007, 06:59 PM   #3
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Default Re: running temparture for 94 sl2

Quote:
Originally Posted by zoso007 View Post
94 Sl2 m/t, where should the needle on the coolant gauge be at normal operating tempature. Mine seems to hang around half and when I idle for a little bit in traffic it starts creeping up to 3/4 and seems like it would keep going. Usually I try to turn off on to a different road then or park somewhere and turn the car off to cool down because I am afraid its going to go into the red. I replaced the thermostat and ECTS about 1000 ago.
Sounds about normal. Does your cooling fan kick on?

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Old 07-11-2007, 09:42 AM   #4
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Default Re: running temparture for 94 sl2

On a normally operating engine it will remain just under 1/2 scale during normal driving. If the A/C is turned off, it will creep up past 3/4 to just short of the red zone when stopped idling for a long time. Just before it hits the red zone the fan should turn on and the gauge reading should drop to below 1./2 scale fairly quickly. If the A/C is on, it should stay around the 1/2 scale or a bit below.

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Old 07-11-2007, 11:58 AM   #5
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Default Re: running temparture for 94 sl2

I had my '95 sl2 in the shop before going on a trip last weekend. I questioned the fact that it runs at 1/4. The shop checked the temp and it showed 185f at 1/4 and 225f at 3/4. They said that this is proper temps.

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Old 07-11-2007, 12:21 PM   #6
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Default Re: running temparture for 94 sl2

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Originally Posted by hmundyiii View Post
I had my '95 sl2 in the shop before going on a trip last weekend. I questioned the fact that it runs at 1/4. The shop checked the temp and it showed 185f at 1/4 and 225f at 3/4. They said that this is proper temps.
Running at 1/4 of the guage is clear indication that the thermostat is stuck open. All three of my 1995 Saturns were running like that and just needed new thermostats.

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Old 07-12-2007, 02:47 PM   #7
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Default Re: running temparture for 94 sl2

As long as it does not go into the red, it is ok. Fan should come on at 3/4.

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Old 07-12-2007, 03:27 PM   #8
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Default Re: running temparture for 94 sl2

Quote:
Originally Posted by HStockSolo View Post
Running at 1/4 of the guage is clear indication that the thermostat is stuck open. All three of my 1995 Saturns were running like that and just needed new thermostats.
I would not say that, it could also be a "soft" ECTS too. When I changed mine recently to test something the normal temperature went from 184 to about 201 and gauge reading changed too. See link below

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Old 07-12-2007, 04:14 PM   #9
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Default Re: running temparture for 94 sl2

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Originally Posted by 97coupe View Post
I would not say that, it could also be a "soft" ECTS too. When I changed mine recently to test something the normal temperature went from 184 to about 201 and gauge reading changed too.
But he has a 94 which has 2 sensors. One for the gauge and one for the PCM.

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Old 07-12-2007, 04:24 PM   #10
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Default Re: running temparture for 94 sl2

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Originally Posted by blackeagle1 View Post
But he has a 94 which has 2 sensors. One for the gauge and one for the PCM.
It does not mean the temp sensor for gauge is not "soft".

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Old 07-12-2007, 06:38 PM   #11
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Default I didn't know 3/4 was normal for fan to kick in ..

I have to admit, whenever my SL2 has come even close to 3/4, which is rarely, I've tended to go "oh s--t" and open windows, turn on the heater full blast, and pray it comes down (which it does).

I guess I have been a doofus! Although, man, I would feel better knowing the fan will kick in before the 3/4 mark. It just seems like that doesn't leave much margin of error, before real trouble starts.

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Old 07-13-2007, 04:20 PM   #12
stefen1990
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Idea Re: running temparture for 94 sl2

mine does the same, first time i noticed i was at sonic with the car on. It was at 3/4 and a half-then i heard the fan kick on. I usually have the a/c on while driving which helps cool it down, but i've never had it over heat...except almost once. I got my coolant/anti-freeze flushed at tires plus it took them from 3 (when i got out of school) to 9 to get it done (no waiting time, i made an appointment) then when i got done i drove 10 minutes to my house and it almost over-heated, my fan didnt even turn on.... i called them back and cussed them out, they swore it was the thermostat (which it wasn't) so they re-did it (this time in 30 mins, not 6 hours.) and it was fixed, but it still gets somewhat high (did this before i got it flushed) so i think thats norm.

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Old 07-13-2007, 05:17 PM   #13
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1995 SL1
Default Re: running temparture for 94 sl2

I've had it worry me when it climbs up too.

Easy fix for those with AC. If you don't feel comfortable letting it climb to the 3/4 fan kick on point, just hit the AC button then turn it back off. The fan will stay on and bring the temp down, you just don't have the option to stop the fan where you want the gauge.

Sort of a one way fan control switch of sorts.

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