Overheating tried everything need help
Thread Starter
5th Gear
Joined: Sep 2010
Posts: 5
Likes: 0
From: atlanta ga
Overheating tried everything need help
I have changed the radiator , water pump ,thermostat ,hoses are not collapsing changed engine temp sensor burped the system.Fans are coming on , I have also ran the fans on full time. Car will not over heat on idle or low speed driving. The car overheats on highway driving or if i hold down the gas at 3000 rpm when parked. Blocked catalityc??? I have no coolant loss or white smoke or mixing happening. Any ideas???
Drifting
Joined: Feb 2008
Posts: 1,596
Likes: 67
From: Bahama North Carolina
[QUOTE=gocanes452;1575378948] I have changed the radiator , water pump ,thermostat ,hoses are not collapsing changed engine temp sensor burped the system.Fans are coming on , I have also ran the fans on full time. Car will not over heat on idle or low speed driving. The car overheats on highway driving or if i hold down the gas at 3000 rpm when parked. Blocked catalityc??? I have no coolant loss or white smoke or mixing happening. Any ideas???[/QUO
How hot is it getting? Do you have bubbles forming in the reservoir tank when running at 3000. Possible that exhaust gas is entering the system. If you suspect that may be happening there is a test kit you can buy that will test for this.
I have changed the radiator , water pump ,thermostat ,hoses are not collapsing changed engine temp sensor burped the system.Fans are coming on , I have also ran the fans on full time. Car will not over heat on idle or low speed driving. The car overheats on highway driving or if i hold down the gas at 3000 rpm when parked. Blocked catalityc??? I have no coolant loss or white smoke or mixing happening. Any ideas???[/QUOHow hot is it getting? Do you have bubbles forming in the reservoir tank when running at 3000. Possible that exhaust gas is entering the system. If you suspect that may be happening there is a test kit you can buy that will test for this.
Last edited by BigGun; Sep 20, 2010 at 01:51 PM.
Drifting
Joined: Feb 2008
Posts: 1,596
Likes: 67
From: Bahama North Carolina
The only one I have worked with is Carolina Auto Masters in Durham. They know vettes inside and out. I think there are several near the coast. You might ask in the regional section and get some more suggestions.
Le Mans Master
Joined: Feb 2002
Posts: 6,937
Likes: 21
From: Waldorf MD
Are you sure that you car is over heating ? Could the temperature sensor be bad?
Also, have you looked up at radiator front, is there debris on the radiator? If not, have you blown air or water from the engine side to clean it out (you can remove the top radiator cover to see if material is between air conditioner coil and radiator).
Also, have you looked up at radiator front, is there debris on the radiator? If not, have you blown air or water from the engine side to clean it out (you can remove the top radiator cover to see if material is between air conditioner coil and radiator).
Thread Starter
5th Gear
Joined: Sep 2010
Posts: 5
Likes: 0
From: atlanta ga
The radiator is brand new so it is clean. I also cleaned the condenser. I changed the temp sensor as well. I did notice the pcm to be hot to the touch the other day. But i had no codes on scan tool!
Tech Contributor
Joined: Aug 2008
Posts: 2,902
Likes: 21
From: Oak Hill Virginia
What he said... Check for bubbles in the tank while the car is overheating. You've certainly thrown a lot of parts at this thing to still be having problems...
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette
Pouria Savadkouei
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
I think what he meant to ask you was not about the radiator being clean, rather the condensor. The air coming in goes through it first, before getting to the radiator and its what catches the bugs, rocks, bags and etc... It really does need to be washed out. Usually what we hear is the temps rising at idle and going down while driving. The fans shut off at something like 35 MPH or should....otherwise they will interfere with the air-flow coming in. Maybe they aren't shutting off? No clue how to test unless you wire up a light into the cockpit. So you have no leaks, yet overheat. Usually an issue with air trapped in there and there is a procedure for burping it although I don't know what it is. If a head gasket is blown, you'll most likely see bubbles in the coolant pressure tank and/or hissing out the radiator cap or tank.
Racer
Joined: Jul 2005
Posts: 278
Likes: 0
From: Exit 105 New Joisey
Radiator (reservoir) cap? If you have a leak there it would cause an overheat situation and you would not necessarily see it. I didn't see you mention it.
And wouldn't a head gasket make your oil look milky?
And wouldn't a head gasket make your oil look milky?
Last edited by MrHiPerf; Sep 21, 2010 at 10:13 AM. Reason: added question
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
It would not show in the oil if it blew between the cylinder and a water jacket. If it blows into an oil passage and connects the water jacket into the oil passage, then yes, it would turn the oil milky.
Le Mans Master
Joined: Mar 2004
Posts: 8,700
Likes: 298
From: Ft. Lauderdale Fl
If you "burped" the hell out of it.....are you absolutely sure that the new t-stat is good. Had a similar problem with a tstat....two new ones were defective. Three was a charm. Test them first in a pan of boiling water and see...1. if they open and 2. at what temp.
Last edited by runner140*; Sep 23, 2010 at 12:48 PM. Reason: add
Racer
Joined: Sep 2010
Posts: 345
Likes: 2
From: Dinuba CA
I'm not sure if this would happen on a Vette but I have had it happen on two other cars: I've had an air pocket displace the coolant and had to incline the entire car to get it out. If you have this problem, find a steep hill to drive up, check you fluid level afterwards.
