99 SLE operating temp question - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 12-17-2007, 06:00 AM   #1
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Default 99 SLE operating temp question

When my 99 SLE has idled for a while and is fairly "warmed up," what should the temp gauge show? I see that the gauge is really weird, so I just don't know what to do with it.

It'* split up into 3 sections. The first is 100-200, and the other two are 200-280. That'* so horrifying! I don't know where that needle is because it never moves past the first 1/3 of the gauge! What a very dumb setup...

So, I have a 180, but I think it'* gone bad, as do most RiceZone thermostats. I'd like to go to a 195, but I want to avoid UIM suckage. I'll see if I can get some pictures tomorrow.
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Old 12-17-2007, 07:16 AM   #2
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don't take the gauges reading as gospel, get a scanner on it.
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Old 12-17-2007, 07:17 AM   #3
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That is a very good idea. Is there any reason GM set up the gauge to look like this?
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Old 12-17-2007, 10:08 AM   #4
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Quote:
Originally Posted by radomirthegreat
That is a very good idea. Is there any reason GM set up the gauge to look like this?
It'* more useful than many other vehicles. A lot of others all I see for a temp gauge is a C on the left side and an H on the other side. As long as your car is near or below 200 I wouldn't worry about it too much.
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Old 12-17-2007, 10:12 AM   #5
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Well, it is nice. I am going to wait for about 5-6 hours before taking pictures. The operating temp doesn't actually get to 200 at all. It looks like it'* at 140 or so when warm.
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Old 12-17-2007, 10:31 AM   #6
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Quote:
Originally Posted by radomirthegreat
Well, it is nice. I am going to wait for about 5-6 hours before taking pictures. The operating temp doesn't actually get to 200 at all. It looks like it'* at 140 or so when warm.
Mine looks like 150-160F when warm.... Tool always says 181-182

205-210 On mine is fan turn on via the gage.... Tool always says 220-225

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Old 12-17-2007, 10:32 AM   #7
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That is interesting. Very interesting. I'll see about borrowing a friend'* scantool, then. I'm still looking for a good deal on a CP9115.
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Old 12-17-2007, 10:53 AM   #8
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Once you know what the differential is, you can 'tune' your ECT for the gauge by adding a series or parallel resistor to the circuit, depending on whether you need to raise or drop the indicated temperature on the gauge.

http://www.bonnevilleclub.com/forum/...e=article&k=24
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