running hot
Thread Starter
Racer
Joined: May 2009
Posts: 470
Likes: 15
From: Corona CA
running hot
My 06 has started to run hot. Not all the time. It happened last week and today. Around town, the temp shoots up to 240, then fan cools it down to 225 - 230 and then it goes right back up. Once I hit the freeway, the temp drops down to normal (just under 220). The problem will then go away for days. In the old days, I would think it was air in the system, but I thought the c6 is self burping. Since it is fine on the freeway, I'm guessing the water pump is fine. I'm not getting any codes and no coolant messages.
Any ideas?
Larry
Any ideas?
Larry
Le Mans Master
Joined: Sep 2007
Posts: 5,526
Likes: 16
From: Mechanicsburg Pennsylvania
My 06 has started to run hot. Not all the time. It happened last week and today. Around town, the temp shoots up to 240, then fan cools it down to 225 - 230 and then it goes right back up. Once I hit the freeway, the temp drops down to normal (just under 220). The problem will then go away for days. In the old days, I would think it was air in the system, but I thought the c6 is self burping. Since it is fine on the freeway, I'm guessing the water pump is fine. I'm not getting any codes and no coolant messages.
Any ideas?
Larry
Any ideas?
Larry
Did you check your coolant level?
A 'sticking' thermostat will give you the symptoms you describe.
Thread Starter
Racer
Joined: May 2009
Posts: 470
Likes: 15
From: Corona CA
I did check the coolant last week and it was fine. Car is still hot today so I can't check it yet. It is a cold (62) rainy day in California so it isn't like it is crazy hot out.
I guess I can just replace the thermo and start with that.
Thanks,
Larry
I guess I can just replace the thermo and start with that.
Thanks,
Larry
Race Director
Joined: Dec 2007
Posts: 19,574
Likes: 167
From: Frederick, MD
My 06 has started to run hot. Not all the time. It happened last week and today. Around town, the temp shoots up to 240, then fan cools it down to 225 - 230 and then it goes right back up. Once I hit the freeway, the temp drops down to normal (just under 220). The problem will then go away for days. In the old days, I would think it was air in the system, but I thought the c6 is self burping. Since it is fine on the freeway, I'm guessing the water pump is fine. I'm not getting any codes and no coolant messages.
Any ideas?
Larry
Any ideas?
Larry
A blockage problem wouldn't go away for days as the junk should remain there. I'm guessing the thermostat is going bad and sticking once in awhile.
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