Overheating issue C6
Thread Starter
Heel & Toe
Joined: Jan 2012
Posts: 23
Likes: 0
Overheating issue C6
I have a 2008 Chevrolet corvette ls3 and I'm about 99% sure I have a cooling fan issue. When going 50 or over, there is no overheating at all, but when at a stand still my coolant temperature will steadily go up. I checked the radiator to see of there was anything blocking it and there was nothing. The thing I'm confused about though is that. I started my car maybe three times, and waited for it to get to about 220 before I shut it off, and for some reason the second time the fan decided to magically work so it didn't reach the 220 it stayed at 196...is this a fan issue a wiring to the fan issue? Anyone had similar problems?
Race Director
Joined: Oct 2010
Posts: 14,475
Likes: 785
From: Las Vegas NV
Of course the temp goes up when your not moving. No air is going through the radiator. 220 is not out of the norm and I think the fan is programmed to come on higher than that. Not sure of the number. It doesnt sound to me like you got a problem.
Thread Starter
Heel & Toe
Joined: Jan 2012
Posts: 23
Likes: 0
Forgive me for not mentioning this but this all started by my car heating to well over 260 and my reduce engine power message came on, my engine coolant overheating light came on all while in traffic and it has done it twice but only while in traffic. Those times I shut it off at 220 just so it wouldn't overheat like that again. But like I said radiator fan only comes on sometimes, or it will not come on at all and let the engine overheat till the messages all come on again
Melting Slicks
Joined: Aug 2010
Posts: 3,063
Likes: 82
From: Tumwater, WA
I just had the same issue so I disconnected the plug to the fan and cleaned the contacts and that solved that for now. MY fan wasnt coming on at all so I guess the contacts got dirty and once I cleaned them the fans come on now. I used MAF cleaner which is just contact cleaner. SOmeone else suggested putting some electric grease on the contacts to prevent them from corroding.
Also check plug to see if its ben burnt or smells like its been burnt.
Also check plug to see if its ben burnt or smells like its been burnt.
Thread Starter
Heel & Toe
Joined: Jan 2012
Posts: 23
Likes: 0
I just had the same issue so I disconnected the plug to the fan and cleaned the contacts and that solved that for now. MY fan wasnt coming on at all so I guess the contacts got dirty and once I cleaned them the fans come on now. I used MAF cleaner which is just contact cleaner. SOmeone else suggested putting some electric grease on the contacts to prevent them from corroding.
Also check plug to see if its ben burnt or smells like its been burnt.
Also check plug to see if its ben burnt or smells like its been burnt.
Melting Slicks
Joined: Aug 2010
Posts: 3,063
Likes: 82
From: Tumwater, WA
Thankyou sir I have taken off and wiped the wire a little bit, the one connected to the metal box by the fan, and it seemed to work, but I will go get some of that maf spray tomorrow, I'm assuming my local autozone would have it? And did you spray the wire that's actually on the fan itself, or the wire on the metal box by the fan?
Burning Brakes
Joined: Jul 2008
Posts: 923
Likes: 37
From: Green Bay Wisconsin
I just had the same issue so I disconnected the plug to the fan and cleaned the contacts and that solved that for now. MY fan wasnt coming on at all so I guess the contacts got dirty and once I cleaned them the fans come on now. I used MAF cleaner which is just contact cleaner. SOmeone else suggested putting some electric grease on the contacts to prevent them from corroding.
Also check plug to see if its ben burnt or smells like its been burnt.
Also check plug to see if its ben burnt or smells like its been burnt.
De Oxit is what I use, it is an amazing product.
http://store.caig.com/s.nl/it.I/id.64/.f
Douglas in Green Bay
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Melting Slicks
Joined: Nov 2005
Posts: 2,345
Likes: 2
From: Houston 06 C6 Ysi SC 402 fgd TX
Forgive me for not mentioning this but this all started by my car heating to well over 260 and my reduce engine power message came on, my engine coolant overheating light came on all while in traffic and it has done it twice but only while in traffic. Those times I shut it off at 220 just so it wouldn't overheat like that again. But like I said radiator fan only comes on sometimes, or it will not come on at all and let the engine overheat till the messages all come on again
Melting Slicks
Joined: Aug 2010
Posts: 3,063
Likes: 82
From: Tumwater, WA
My problem seems to come and go so I think the controller might be going. I put a mutimeter to the top plug and the far right pin read 12.7 volts and the middle read 0 and the far left read like .4v Not sure what they should read but one is getting good voltage.
Tech Contributor
Joined: Dec 2006
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From: Van Buren Arkansas
Wounded Warrior Escort '11
Melting Slicks
Joined: Mar 2007
Posts: 2,391
Likes: 23
From: Santa Barbara CA
Right lower side of fan shroud area
The coolant temp shouldn't keep going up if the fan is working properly. This isn't the 1960's anymore -- temperature control is much more precise. The stock C6 fan table turns the fan on at %15 at 199 degrees. At 220 it should be at 74% of max speed.
Yep..... I'd recommend unplugging the connector at the fan controller and checking it out.
Melting Slicks
Joined: Aug 2010
Posts: 3,063
Likes: 82
From: Tumwater, WA
Right lower side of fan shroud area
The coolant temp shouldn't keep going up if the fan is working properly. This isn't the 1960's anymore -- temperature control is much more precise. The stock C6 fan table turns the fan on at %15 at 199 degrees. At 220 it should be at 74% of max speed.
Yep..... I'd recommend unplugging the connector at the fan controller and checking it out.
The coolant temp shouldn't keep going up if the fan is working properly. This isn't the 1960's anymore -- temperature control is much more precise. The stock C6 fan table turns the fan on at %15 at 199 degrees. At 220 it should be at 74% of max speed.
Yep..... I'd recommend unplugging the connector at the fan controller and checking it out.
Melting Slicks
Joined: Aug 2010
Posts: 3,063
Likes: 82
From: Tumwater, WA
so has anyone upgraded their radiator and did it lower the temps any on avg? If so what is a good company to get one thru? If i have to replace the fan controller It looks like I will be taking alot of stuff off, not sur eif the bumper has to come off but if so then might as well as upgrade the radiator too.
Melting Slicks
Joined: Mar 2007
Posts: 2,391
Likes: 23
From: Santa Barbara CA
so has anyone upgraded their radiator and did it lower the temps any on avg? If so what is a good company to get one thru? If i have to replace the fan controller It looks like I will be taking alot of stuff off, not sur eif the bumper has to come off but if so then might as well as upgrade the radiator too.
It should be really easy to change. Book time on it is only 0.4 hours. Not a great pic, but here you go:
Uploaded with ImageShack.us
Melting Slicks
Joined: Aug 2010
Posts: 3,063
Likes: 82
From: Tumwater, WA
It should be really easy to change. Book time on it is only 0.4 hours. Not a great pic, but here you go:
Uploaded with ImageShack.us
Uploaded with ImageShack.us
Melting Slicks
Joined: Sep 2005
Posts: 2,670
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From: merritt island fl
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so has anyone upgraded their radiator and did it lower the temps any on avg? If so what is a good company to get one thru? If i have to replace the fan controller It looks like I will be taking alot of stuff off, not sur eif the bumper has to come off but if so then might as well as upgrade the radiator too.
Melting Slicks
Joined: Aug 2010
Posts: 3,063
Likes: 82
From: Tumwater, WA
Took car to dealer and they used some kit to fix the connector, it didnt work as I had to bring it back so they are replacing the connectors. Even tho they werent burnt and had proper voltage readings they werent making good contact and the kit didnt help so they will replace them under warranty even tho Im right at the 36,400 mile mark. And they gave me a rental to boot while I wait. Got lucky.
Oh and they adjusted the top, saying they can adjust some pins to re align the top so it wont creak as much. It did help quite a bit so far but still have some but not as much creaking.
Oh and they adjusted the top, saying they can adjust some pins to re align the top so it wont creak as much. It did help quite a bit so far but still have some but not as much creaking.