Coolant Temp
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From: Prattville AL
Coolant Temp
Just curious what our typical coolant temp should be. I have a 98 C5 auto and I have noticed that my typical coolant temp is in around 180* and if it idles for a long time, it gets up to aroud 215*. Just checking to see if this is normal, or if I may have an aftermarket Tstat installed in my Vette.
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I have the stock thermostat and my fans are programmed to come on earlier. I sit around 194-196 degrees. If you are at the 180 mark, I would think that you have a lower thermostat installed. I believe the stock one to be 190, anyone know for sure?
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From: Prattville AL
Ive been watching the coolant temp a lot of my DIC since it turned cooler to make sure I dont romp on my car when the engine is too cool, and I have noticed even after several minutes of driving, it has run under 180* on the interstate and once it gets up to around 200+*, it quickly gets back to 180ish.
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From: Prattville AL
Originally Posted by Zilla
I would check to see if there is any debris stuck up against the rad 
I got the car from Carmax and it was transferred from another state, so I know very little about the car's history. I have already found one mod done to it, and I have been suspicious that a 180* tstat has been added since it is a fairly common mod.
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Your temps sound a little cooler than normal. Mine goes about 190-195 most of the time and can get up to about 220 in traffic.
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From: Whittier California
Originally Posted by JDs00PewterCoupe
Your temps sound a little cooler than normal. Mine goes about 190-195 most of the time and can get up to about 220 in traffic.
Normal freeway driving 194, traffic 220 +
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From: Ocean Springs MS
Since a thermostat controls the minimum temp of a warmed up engine, and your's is running at 180 on the freeway (typically the lowest temp enviroment) I'd say you have a 180 deg thermostat, and probably have your fans reprogrammed, if it doesn't get over 215 idling in traffic.
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The factory stat is a 192.
The low fan speed kicks on at 225.
The high fan speed is supose to kick on at 235.
If I turn on my AC. the temp stays around 210, in stop & go traffic.
Good Luck
The low fan speed kicks on at 225.
The high fan speed is supose to kick on at 235.
If I turn on my AC. the temp stays around 210, in stop & go traffic.
Good Luck
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Depending on the model year...
For later model years:
The low speed cooling fan is commanded on when the coolant temperature reaches 108°C (226°F). It is turned off if the coolant temperature lowers to 104°C (219°F). The high speed cooling fan is commanded on when the coolant temperature reaches 113°C (235°F). It is turned off if the coolant temperature lowers to 108°C (226°F). When the A/C is on and the coolant temperature reaches 85°C (185°F), the low speed cooling fan will be turned on at vehicle speeds less than 56 kPh (35 mph).
For early model years: 97 98 and some 99's
Low speed fans come on at 219,high speed fans come on at 228,low speed with a/c on...
For later model years:
The low speed cooling fan is commanded on when the coolant temperature reaches 108°C (226°F). It is turned off if the coolant temperature lowers to 104°C (219°F). The high speed cooling fan is commanded on when the coolant temperature reaches 113°C (235°F). It is turned off if the coolant temperature lowers to 108°C (226°F). When the A/C is on and the coolant temperature reaches 85°C (185°F), the low speed cooling fan will be turned on at vehicle speeds less than 56 kPh (35 mph).
For early model years: 97 98 and some 99's
Low speed fans come on at 219,high speed fans come on at 228,low speed with a/c on...
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It sounds like your tstat is not stock. My mostly stock vette runs around 192-194 at highway speeds. Also, if it is staying at 180, then the tstat is cooler than 180. Their temperatures are rated at where they begin to open. I'd guess it is beginning to open around 170.