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Normal temp on ls1

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Old Feb 20, 2010 | 05:48 AM
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Default Normal temp on ls1

Ok is this somthin to worry about? My car doesn't seem to be get warm I was driving for about 15 idleing also and it didn't get warmer then 170 degrees? My car rarely is ever at 210. Do I need a new therosTat?
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Old Feb 20, 2010 | 06:14 AM
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Yes, it's jammed open.
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Old Feb 20, 2010 | 07:12 AM
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Someone may have put a 160* tstat in there cause thats where mine runs also 98 are the only cars with accurate gauges 99+are just dummy gauges which will only tell u when you are overheating.
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Old Feb 20, 2010 | 07:38 AM
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If your going by the gauge its probably off. Mine sits under 210 but verified with a computer really runs around 215. and contrary to what was said above running a thermostat jammed open will actually cause the car to run hotter because the coolant doesnt have enough time to cool down in the radiator.
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Old Feb 20, 2010 | 08:33 AM
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[QUOTE=redbird555;12920903]If your going by the gauge its probably off. Mine sits under 210 but verified with a computer really runs around 215. and contrary to what was said above running a thermostat jammed open will actually cause the car to run hotter because the coolant doesnt have enough time to cool down in the radiator.[/QUOTE]


Complete internet heresay regurgitation......

nncfan8 prolly nailed it. That is right where my 98 runs with a 160* t-stat....
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Old Feb 20, 2010 | 08:33 AM
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Originally Posted by redbird555
If your going by the gauge its probably off. Mine sits under 210 but verified with a computer really runs around 215. and contrary to what was said above running a thermostat jammed open will actually cause the car to run hotter because the coolant doesnt have enough time to cool down in the radiator.
sometimes yes. but i've run a few vehicles without a thermostat and they all run very cold, never getting up to even opperating temp.
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Old Feb 20, 2010 | 11:23 AM
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yea if the thermostat is jammed open the car will run cooler and take alot longer to get up to operating temp, ive ran a few vehicles without a thermostat
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Old Feb 20, 2010 | 11:56 AM
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Thermostats purpose is to heat the vehicle up. They control the minimum temp of the engine and that's it. An open thermostat won't heat the vehicle up.
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Old Feb 20, 2010 | 12:17 PM
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how are 99+ cars just dummy gauges but the 98's are real???
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Old Feb 20, 2010 | 01:41 PM
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Originally Posted by baalic
how are 99+ cars just dummy gauges but the 98's are real???
It's a different temp sender and different wiring harness for that sender/gage (one more wire on the '98 sender), so you can't just swap over to the older sender.
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Old Feb 20, 2010 | 01:55 PM
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Originally Posted by redbird555
If your going by the gauge its probably off. Mine sits under 210 but verified with a computer really runs around 215. and contrary to what was said above running a thermostat jammed open will actually cause the car to run hotter because the coolant doesnt have enough time to cool down in the radiator.
nope , it will take longer to heat up and if its cold enough out side ctually never get hot at all, my ls1 has no T stat and in the winter i barely get over 150.
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Old Feb 20, 2010 | 02:12 PM
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Originally Posted by RPM WS6
It's a different temp sender and different wiring harness for that sender/gage (one more wire on the '98 sender), so you can't just swap over to the older sender.
mine seems to function just fine and doesn't act like a "dummy"... when its cold, it reads cold when its hot it reads hot...
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Old Feb 20, 2010 | 03:43 PM
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Isn't it bad to run it with no stat? Computer is set to run the best at 210. My car seems like it boggs when it's not warm enough. And my car is a 98
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Old Feb 20, 2010 | 04:05 PM
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Originally Posted by baalic
mine seems to function just fine and doesn't act like a "dummy"... when its cold, it reads cold when its hot it reads hot...
The '99+ gage is much less sensitive to changes in temp. It will read right around 210° for actual temps that are anywhere from 190-230°F.

The '98 is more sensitive, and will show much more minor changes in temp.

I've spent time monitoring actual temps (via my PCM scanner) vs. what's shown on the gage on both my '98 and my '02 car. The '98s are definitely more sensitive and accurate.

Originally Posted by LS1TAUTO
Isn't it bad to run it with no stat? Computer is set to run the best at 210. My car seems like it boggs when it's not warm enough. And my car is a 98
The computer is not set to run "best" at any temp. There are spark and fuel maps for all temp ranges, anything above 176°F is considered fully warm by the PCM. Now, that's not to say that the engine doesn't have a "best" temp, and I agree that a T-stat should be used. My experiance is that my LS1s seem to run best in the 195-205 degree range.

The factory T-stat is an 86°C unit, which converts to 186-187°F. The factory fan settings will allow the coolant to reach temps into the 230° range under some conditons. I stick with the stock stat, and tune the fans to never allow coolant temps to exceed 210°F. While cruising, my temps are usually in the mid-190s.
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Old Feb 20, 2010 | 06:11 PM
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Originally Posted by RPM WS6
The '99+ gage is much less sensitive to changes in temp. It will read right around 210° for actual temps that are anywhere from 190-230°F.

The '98 is more sensitive, and will show much more minor changes in temp.

I've spent time monitoring actual temps (via my PCM scanner) vs. what's shown on the gage on both my '98 and my '02 car. The '98s are definitely more sensitive and accurate.



The computer is not set to run "best" at any temp. There are spark and fuel maps for all temp ranges, anything above 176°F is considered fully warm by the PCM. Now, that's not to say that the engine doesn't have a "best" temp, and I agree that a T-stat should be used. My experiance is that my LS1s seem to run best in the 195-205 degree range.

The factory T-stat is an 86°C unit, which converts to 186-187°F. The factory fan settings will allow the coolant to reach temps into the 230° range under some conditons. I stick with the stock stat, and tune the fans to never allow coolant temps to exceed 210°F. While cruising, my temps are usually in the mid-190s.
Ok now that makes more sense...that its "less sensitive" but by far its different an an actual dummy gauge.
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Old Feb 22, 2010 | 01:20 PM
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Originally Posted by nncfan8
Someone may have put a 160* tstat in there cause thats where mine runs also 98 are the only cars with accurate gauges 99+are just dummy gauges which will only tell u when you are overheating.
So is running a 160 tstat a bad thing? What are the advantages and disadvantages of it? I just bought a 98 that I suspect has a 160 in it also, but the car seems to run fine with it and the Texas heat is coming soon.
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Old Feb 22, 2010 | 02:31 PM
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Originally Posted by lsjuanmike
So is running a 160 tstat a bad thing? What are the advantages and disadvantages of it? I just bought a 98 that I suspect has a 160 in it also, but the car seems to run fine with it and the Texas heat is coming soon.
Do a search on this and you'll find MANY threads with lots of opinions on both sides.

Personally, I would never use a 160 stat for most NA setups. On the other hand, if you have super high compression, or forced induction/power adder, then I would consider it depending on climate.
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