240 degrees too hot?
Thread Starter
Burning Brakes
Joined: Mar 2004
Posts: 842
Likes: 4
From: Corpus Christi TX
St. Jude Donor '05
240 degrees too hot?
I have noticed my 2000 6-speed is always running at 237 to 240 degrees on the coolant temperature. This is true regardless of weather and is the same with the AC on and off. While the needle is not in the "red" zone... my gut tells me this is too hot. There is nothing blocking the air intake to the radiator.
Any thoughts? Is this a safe temperature for my C5?
Any thoughts? Is this a safe temperature for my C5?
Thread Starter
Burning Brakes
Joined: Mar 2004
Posts: 842
Likes: 4
From: Corpus Christi TX
St. Jude Donor '05
Both fans are on regardless of the AC. I assume because it's running too hot. I have inspected (the best I can... it's tight quarters in there) the radiator and condensor and all looks clean and intact. I suppose I need to check the thermostat, the coolant condition, and for the presence of air.
Where is the thermostat located? I haven't messed with one of those since my Mustang days.
Where is the thermostat located? I haven't messed with one of those since my Mustang days.
Team Owner
Joined: Jul 2006
Posts: 22,139
Likes: 4,156
From: Kannapolis NC
Check to make sure there's no debris between the radiator and the ac condensor. If the fans are running it sounds like you're not getting enough air through.
Look up under the front behind the condensor. The outside that you can see from the front may be clean, but there's a V in there with space between the two that may have sucked up a bag, or leaves or grass, etc.
Look up under the front behind the condensor. The outside that you can see from the front may be clean, but there's a V in there with space between the two that may have sucked up a bag, or leaves or grass, etc.
Last edited by 65GGvert; Mar 25, 2012 at 04:55 PM.
Burning Brakes
Joined: Feb 2011
Posts: 776
Likes: 1
From: spring tx
For sure its running to high.process of elimination.cheapest first..check between radiator for crap.is coolant old? Change .thermostat..then is rad pluged or water pump bad.ohh change coolant cap.may be bad..
Advanced
Joined: Apr 2007
Posts: 97
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From: Chico California
Here's a good DIY thread on cleaning the fins.
http://forums.corvetteforum.com/c5-g...-my-97-c5.html
http://forums.corvetteforum.com/c5-g...-my-97-c5.html
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St. Jude Donor '12,'13,'15,'16,'17
What temp are the fans coming on? Do they bring the temp down and cycle off? Since you say it always runs at 237-240 it is at that temp on the freeway where the fan are not needed. I would think since the radiator fins are clean it must be a bad thermostat or the radiator is getting plugged up and not flowing the coolant properly.
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