Running warmer than usual
Thread Starter
Melting Slicks
Joined: Jul 2005
Posts: 2,586
Likes: 2
From: Bardstown Kentucky
Running warmer than usual
I noticed my car creeped up to 225 yesterday and while it was warm it never gets up that warm. The oil was 235, do you all think this is normal operating temps. in the summer?
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
Were you driving at highway apeeds or sitting ideling in traffic. At highway speeds that is high. In traffic ideling that is normal.
I'd check under the car for debris ( small dogs, small children
and other things like plastic bags etc) that might be blocking the radiator. These cars are bottom breathers and collect everything on the road. Also check the color of the coolant in the surge tank. If it is muddy brown you need to have the coolant flushed. If still reddish in color I would check to see when the last time it was changed. The coolant is good for up to 5 years and 100,000 miles WHICH EVER COMES FIRST.
I'd also check to see if the fans are running when the engine temp reaches 226 ideling. If not you need to find out why ( fuse, relay, bad fan, etc??)
I'd check under the car for debris ( small dogs, small children
and other things like plastic bags etc) that might be blocking the radiator. These cars are bottom breathers and collect everything on the road. Also check the color of the coolant in the surge tank. If it is muddy brown you need to have the coolant flushed. If still reddish in color I would check to see when the last time it was changed. The coolant is good for up to 5 years and 100,000 miles WHICH EVER COMES FIRST.I'd also check to see if the fans are running when the engine temp reaches 226 ideling. If not you need to find out why ( fuse, relay, bad fan, etc??)
All good info.above! 225 is high if you're moving.
Race Director
Joined: Mar 2008
Posts: 12,413
Likes: 502
From: Rio Rancho NM
Yes it's normal
C5 Cooling Fans Operation
The low speed cooling fan is commanded on when the coolant temperature reaches 108°C (226°F). It is turned off if the coolant temperature lowers to 104°C (219°F). The high speed cooling fan is commanded on when the coolant temperature reaches 113°C (235°F). It is turned off if the coolant temperature lowers to 108°C (226°F). When the A/C is on and the coolant temperature reaches 85°C (185°F), the low speed cooling fan will be turned on at vehicle speeds less than 56 kPh (35 mph).
When you have "cooling problems" always check the radiator for foreign material (grass, leaves, plastic bags, etc.), since these C5s are bottom breathers, they act as road vacuum cleaners
C5 Cooling Fans Operation
The low speed cooling fan is commanded on when the coolant temperature reaches 108°C (226°F). It is turned off if the coolant temperature lowers to 104°C (219°F). The high speed cooling fan is commanded on when the coolant temperature reaches 113°C (235°F). It is turned off if the coolant temperature lowers to 108°C (226°F). When the A/C is on and the coolant temperature reaches 85°C (185°F), the low speed cooling fan will be turned on at vehicle speeds less than 56 kPh (35 mph).
When you have "cooling problems" always check the radiator for foreign material (grass, leaves, plastic bags, etc.), since these C5s are bottom breathers, they act as road vacuum cleaners
