C5 Overheated
Thread Starter
Drifting
Joined: Nov 2004
Posts: 1,895
Likes: 0
From: Lee's Summit MO
C5 Overheated
Had a great trip into work today. About 5 miles from home, the C5 water temp shoots up to 260. I pulled over and waited for the temp to drop to the 200 range then headed back to the house.
Within a mile, temp is back up to 250, so I shut her down and wait again.
Within a few minutes temp is back to 210 or so, and everything is running normal. Head back home, and things are running smooth, then just before I get to the house, temp starts to climb again.
I'm thinking thermostat.
Any other ideas out there?
Within a mile, temp is back up to 250, so I shut her down and wait again.
Within a few minutes temp is back to 210 or so, and everything is running normal. Head back home, and things are running smooth, then just before I get to the house, temp starts to climb again.
I'm thinking thermostat.
Any other ideas out there?
Racer
Joined: Sep 2006
Posts: 280
Likes: 0
Had a great trip into work today. About 5 miles from home, the C5 water temp shoots up to 260. I pulled over and waited for the temp to drop to the 200 range then headed back to the house.
Within a mile, temp is back up to 250, so I shut her down and wait again.
Within a few minutes temp is back to 210 or so, and everything is running normal. Head back home, and things are running smooth, then just before I get to the house, temp starts to climb again.
I'm thinking thermostat.
Any other ideas out there?
Within a mile, temp is back up to 250, so I shut her down and wait again.
Within a few minutes temp is back to 210 or so, and everything is running normal. Head back home, and things are running smooth, then just before I get to the house, temp starts to climb again.
I'm thinking thermostat.
Any other ideas out there?
I'm thinking plastic bag sucked up into radiator opening or fans not coming on.
Get down on your hands and knees and look up inside the radiator opening - hopefully it's as easy as taking out the plastic bag or paper that got sucked up in there !!
Good luck.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Check the ground wire/pack located at the top forward frame rail adjacent to the hood riser. The fan grounds go through that. Mine came lose and caused exactly the same thing. Check fuses and/or verify the fans are running. Both will run at the same time, either in low speed mode or high speed.
Thread Starter
Drifting
Joined: Nov 2004
Posts: 1,895
Likes: 0
From: Lee's Summit MO
Easy check and I'll do this when I get home, but I think it's unlikely since it appears to be intermittent.
Thread Starter
Drifting
Joined: Nov 2004
Posts: 1,895
Likes: 0
From: Lee's Summit MO
Check the ground wire/pack located at the top forward frame rail adjacent to the hood riser. The fan grounds go through that. Mine came lose and caused exactly the same thing. Check fuses and/or verify the fans are running. Both will run at the same time, either in low speed mode or high speed.
Thread Starter
Drifting
Joined: Nov 2004
Posts: 1,895
Likes: 0
From: Lee's Summit MO
Drifting
Joined: Jan 2005
Posts: 1,517
Likes: 0
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Thread Starter
Drifting
Joined: Nov 2004
Posts: 1,895
Likes: 0
From: Lee's Summit MO
Finally got the chance to do a few diagnostics tonight.
Radiator is clear of debris.
Fluid level is fine.
As the temp goes up, the fans do come on, but the temp continues to rise.
So,
I'm back to either water pump, or thermostat.
When I get some more time I'll pull the thermostat and test it.
I'm hoping it's not the water pump.
Radiator is clear of debris.
Fluid level is fine.
As the temp goes up, the fans do come on, but the temp continues to rise.
So,
I'm back to either water pump, or thermostat.
When I get some more time I'll pull the thermostat and test it.
I'm hoping it's not the water pump.
Thread Starter
Drifting
Joined: Nov 2004
Posts: 1,895
Likes: 0
From: Lee's Summit MO
OK, after some issues, it turned out it was the thermostat after all. I replaced it then still had some trouble that turned out to be a big air pocket in the cooling system.
Who was the genius that decided there didn't need to be a cap ON the radiator???
Who was the genius that decided there didn't need to be a cap ON the radiator???
2003, 2004, 260, c5, corvette, forum, heated, intermittent, minutes, overheat, overheated, overheating, problem, temperature, water
