Cooling issue SOLVED!
Thread Starter
Safety Car
Joined: Jan 2004
Posts: 4,776
Likes: 142
From: North of Atlanta GA
St. Jude Donor '05
Cooling issue SOLVED!
My 02' Coupe has always run 20 to 25 degrees hotter than most vette owners I know. If we're on the road and my coolant temp is 220 the other guys are at 198 or so. This has gone on for years, even though I've followed the "run to 3000 rpm/loosen overflow tank cap" burp procedure by the book each time I flushed the system, and cleaned the dirt and sand from between the fins of the radiator.
So I called my friend VinceG (forum member) for advice. He told me he felt there had to be air in the system and told me about the burp tube at the front of the heads, so I searched the forum, found a thread and picture of it and followed the procedure. VinceG also told me he fills his overflow tank up to the plastic piece that you see if you look down into the tank when you take the cap off.
After following all the instructions and letting the car idle in the driveway for a few minutes I check the temp and it's at 172
Usually it's up to 190 or so by now. So I take it out on the road, outside temp is about 82 degrees, after a mile coolant temp is 178, I keep driving and it raises to 190, I get on the freeway and drove it hard for a few miles and the temp gets to 198.
Finally back on the street sitting at a long stop light the temp rose to 203 but went down to 201 seconds after taking off from the light. I have NEVER seen coolant temps this low in this car under the same weather and driving conditions EVER! I even drove the whole time in 3rd gear (A4) which usually brings the temp up a few degrees compared to driving in drive/OD.
Found the pic and writeup on the burp tube here:
http://forums.corvetteforum.com/c5-t...erheating.html
Real easy, it's at the front/top of the engine, easy to get to and takes a 10mm wrench or socket.
Thanks to VinceG and to the Forum members that posted tips.
So I called my friend VinceG (forum member) for advice. He told me he felt there had to be air in the system and told me about the burp tube at the front of the heads, so I searched the forum, found a thread and picture of it and followed the procedure. VinceG also told me he fills his overflow tank up to the plastic piece that you see if you look down into the tank when you take the cap off.
After following all the instructions and letting the car idle in the driveway for a few minutes I check the temp and it's at 172
Usually it's up to 190 or so by now. So I take it out on the road, outside temp is about 82 degrees, after a mile coolant temp is 178, I keep driving and it raises to 190, I get on the freeway and drove it hard for a few miles and the temp gets to 198. Finally back on the street sitting at a long stop light the temp rose to 203 but went down to 201 seconds after taking off from the light. I have NEVER seen coolant temps this low in this car under the same weather and driving conditions EVER! I even drove the whole time in 3rd gear (A4) which usually brings the temp up a few degrees compared to driving in drive/OD.
Found the pic and writeup on the burp tube here:
http://forums.corvetteforum.com/c5-t...erheating.html
Real easy, it's at the front/top of the engine, easy to get to and takes a 10mm wrench or socket.
Thanks to VinceG and to the Forum members that posted tips.
Last edited by pcfred; Aug 25, 2012 at 07:13 PM.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
I've changed the coolant twice on my Z06, and it seemed to burp itself out 100% both times. Strange that yours wouldn't burp itself, but maybe if a bubble gets trapped just right it won't release.
