High Temps = High Temps
Thread Starter
Melting Slicks
Joined: Jun 2009
Posts: 2,905
Likes: 10
From: Jesuit Bend Louisiana
High Temps = High Temps
Wow -
104 degrees outside today and the Vette was running warmer than usual. As I'm told by everyone on the Forum, not to worry, it still messes with me to see my coolant temp run up to 210 with the AC on when I'm at a standstill....it is worse if I turn off the AC because the electric fans don't run.....
It was so hot today my GY runflats actually felt soft!!
I always understood that heat was a killer for engines and components, I wonder why GM made the setpoint for the fan to kick on at 225 degrees? seems rather high....any work around for this?
104 degrees outside today and the Vette was running warmer than usual. As I'm told by everyone on the Forum, not to worry, it still messes with me to see my coolant temp run up to 210 with the AC on when I'm at a standstill....it is worse if I turn off the AC because the electric fans don't run.....
It was so hot today my GY runflats actually felt soft!!
I always understood that heat was a killer for engines and components, I wonder why GM made the setpoint for the fan to kick on at 225 degrees? seems rather high....any work around for this?
Race Director
Joined: Aug 2003
Posts: 16,270
Likes: 30
From: "It's 106 miles to Chicago, we've got a full tank of gas, half a pack of cigarettes, it's dark, and
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-‘18-'19
NCM Sinkhole Donor
I assume the OP was running his A/C - and if he was both of the fans were already running at high speed....changing the setting of when the fans come on will not matter if they are already running.
210 degrees idling in traffic is not that hot - and certainly wouldn't be a cause for concern to me.
210 degrees idling in traffic is not that hot - and certainly wouldn't be a cause for concern to me.
Le Mans Master
Joined: May 2007
Posts: 5,383
Likes: 6
From: hagerstown md
St. Jude Donor '08-'09
I assume the OP was running his A/C - and if he was both of the fans were already running at high speed....changing the setting of when the fans come on will not matter if they are already running.
210 degrees idling in traffic is not that hot - and certainly wouldn't be a cause for concern to me.
210 degrees idling in traffic is not that hot - and certainly wouldn't be a cause for concern to me.
Black. I was referring to the statement he made about when he had the AC off, his temps were higher. I shoulda specified more clearly.
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
As stated above you could have your tuner set the fans to come on earlier instead of so late -
You can also get a 180* thermostat that will compliment the new fan settings and if you really want the temps down you can get a Electric water Pump too
works at full potential even at a stop light 55 GPM
Thanks,Matt
You can also get a 180* thermostat that will compliment the new fan settings and if you really want the temps down you can get a Electric water Pump too
works at full potential even at a stop light 55 GPMThanks,Matt
Race Director
Joined: Jul 2007
Posts: 11,467
Likes: 8
From: 972 and 405
I was going through stop and go traffic here in DFW and saw my water temp spike to 228F!!! This was with the AC blowing. I turned the temp from 60F to 90F upon moving and it "cooled" the water temp down to 220F. And not to mention I had a radiator flush a few weeks ago. It's hard to imagine that only a few degrees difference in the air makes this large a difference. For engines to normally operate at double the ambient temps I just don't understand how a few degrees difference in the air makes the water temp get so much warmer. It's almost like you have to modify the stock cooling system to feel safe.
-Alex
-Alex
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
Thread Starter
Melting Slicks
Joined: Jun 2009
Posts: 2,905
Likes: 10
From: Jesuit Bend Louisiana
Melting Slicks
Joined: Apr 2010
Posts: 2,194
Likes: 146
From: Houston Republic of Texas
St. Jude Donor '10-'11-'12-'13-'14, '16
Made a run to Lake Charles yesterday to make my regular donations to the boats. On the way back started hitting 220 with a/c on,when it started creeping up to around 235 I turned a/c off. After that it started going down,and I made sure to try to stay clear of traffic so I could get more air into my car. It didn't get as low as I would like, but it did get down to 220, and it was HOT out on the road. Hopefully it's just this heat we're going through right now, but I'm definitely keeping an eye on it.
Race Director
Joined: Mar 2008
Posts: 12,413
Likes: 501
From: Rio Rancho NM
Here is some info for you guys from the manual
C5 Cooling Fans Operation
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).
When you have "cooling problems" always check the radiator for foreign material (grass, leaves, plastic bags, etc.), since these C5s are bottom breathers, they act as road vacuum cleaners.
Burning Brakes
Joined: Jun 2010
Posts: 812
Likes: 2
From: Metairie Louisiana
Seeing 225+ deg in slow moving traffic. New Orleans was 99 today. When I'm out of traffic and can move at 65-75mph it will drop to 190. Try to avoid traffic and have low mile proper coolant along with a fresh oil change. I also reframe from driving it hard at an elevated temp
Race Director
Joined: Aug 1999
Posts: 11,114
Likes: 669
From: SE Pennsylvania
St. Jude Donor '03 thru '26
Oldtimer
I assume the OP was running his A/C - and if he was both of the fans were already running at high speed....changing the setting of when the fans come on will not matter if they are already running.
210 degrees idling in traffic is not that hot - and certainly wouldn't be a cause for concern to me.
210 degrees idling in traffic is not that hot - and certainly wouldn't be a cause for concern to me.
I've often wondered why any of you who live in Texas or anywhere along the Gulf coast, don't have a tuner reset the fans to come on a little earlier and put in a 160 degree thermostat. But this has been a really odd summer. We usually have 24 days above 90 degrees, but it's only August, the Maple tree out front is sending off seedling and we closing in 35 days of 90 degrees plus. I can only imagine what you folks down south are having to deal with. It's the humidity !
Last edited by killain; Aug 2, 2010 at 10:09 PM.
Race Director
Joined: Jul 2007
Posts: 11,467
Likes: 8
From: 972 and 405
-Alex
Instructor
Joined: Mar 2010
Posts: 139
Likes: 0
From: whitehouse texas
I was having some cooling problems like you are describing. Today I jacked up the front everything looked clean. While it was up I blew it out with my air compressor and you would not belive all of the dirt & grass that came out. Went out for a test drive this afternoon in the hotest part of day (105 heat index) and ran a whole lot cooler!
Racer
Joined: Apr 2010
Posts: 385
Likes: 0
From: Corona California
I was having some cooling problems like you are describing. Today I jacked up the front everything looked clean. While it was up I blew it out with my air compressor and you would not belive all of the dirt & grass that came out. Went out for a test drive this afternoon in the hotest part of day (105 heat index) and ran a whole lot cooler!
I did the same thing with the air compressor, and it dropped me from 220's to 190's in the same outside temperatures, same city driving conditions. The radiator can look clean but blow it out you will be surprised how much may come out!.
Racer
Joined: Jul 2010
Posts: 311
Likes: 0
From: Arborg Manitoba
I was having some cooling problems like you are describing. Today I jacked up the front everything looked clean. While it was up I blew it out with my air compressor and you would not belive all of the dirt & grass that came out. Went out for a test drive this afternoon in the hotest part of day (105 heat index) and ran a whole lot cooler!
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
There is a procedure to burp the system.
Have you checked for debris between the radiator and condenser? Remove the cowl on top and inspect between them. You may have material build up. Compressed air and a lint brush from Home Depot works well. Never use a brush to go up and down on the fins, brush along the fins.
Have you checked for debris between the radiator and condenser? Remove the cowl on top and inspect between them. You may have material build up. Compressed air and a lint brush from Home Depot works well. Never use a brush to go up and down on the fins, brush along the fins.