Oil temp
Thread Starter
Pro
Joined: Oct 2007
Posts: 701
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From: Valley Nebraska
Help Oil temp high
My c5 keeps having high temp when I autocross. 30 second run and it will show 250 degrees. Could this me a faulty sensor? Anyone else had this issue
thanks
thanks
Last edited by benapm1; Jul 19, 2020 at 07:10 PM. Reason: No one responded
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Safety Car
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St. Jude Donor '20-'21-'22-'23-'24
Your C5, if stock, doesn't have an oil cooler. Time to upgrade.
250 is fine, if you have good oil in it FYI. The over temp alarm comes on at 280.
Improved Racing makes a great cooler for the C5, or you can get a DeWitts radiator with an oil cooler built in. Both good options. My car has the DeWitts EOC radiator and I see 250-255 on full 30 minute track sessions here in Florida.
250 is fine, if you have good oil in it FYI. The over temp alarm comes on at 280.
Improved Racing makes a great cooler for the C5, or you can get a DeWitts radiator with an oil cooler built in. Both good options. My car has the DeWitts EOC radiator and I see 250-255 on full 30 minute track sessions here in Florida.
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From: Somewhere, Florida
St. Jude Donor '20-'21-'22-'23-'24
Here is a really good video everyone should watch re: oil.
Skip to 7:40 for discussion on temp:
https://www.youtube.com/watch?v=6VLM...TFFtwVXaAaAxcU
Skip to 7:40 for discussion on temp:
https://www.youtube.com/watch?v=6VLM...TFFtwVXaAaAxcU
Drifting
Joined: Apr 2019
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From: Morristown, TN
250-255 degrees isnt all that bad. Good oil doesnt start breaking down until around the 300 degree mark. Impurities in the oil like water vapors etc dont start burning out like they are supposed to until the operating temps of 225 or so.
Race Director
Joined: May 2003
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From: Iowa
St. Jude Donor '03 thru '26
Your C5, if stock, doesn't have an oil cooler. Time to upgrade.
250 is fine, if you have good oil in it FYI. The over temp alarm comes on at 280.
Improved Racing makes a great cooler for the C5, or you can get a DeWitts radiator with an oil cooler built in. Both good options. My car has the DeWitts EOC radiator and I see 250-255 on full 30 minute track sessions here in Florida.
250 is fine, if you have good oil in it FYI. The over temp alarm comes on at 280.
Improved Racing makes a great cooler for the C5, or you can get a DeWitts radiator with an oil cooler built in. Both good options. My car has the DeWitts EOC radiator and I see 250-255 on full 30 minute track sessions here in Florida.
Have you really cleaned the radiator and the AC condenser? Chit gets up there easy and that requires a good blow job from the engine side. You are not alone hitting those temps and a lot of those solve there problem just by cleaning the radiator and condenser. Others have the car's fans come on earlier as the factory settings are high. I've done this to my supercharged 99 and she runs a cool 190-200, even when doing 150 mph (disclaimer to all cops, i was doing the speed limit)
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St. Jude Donor '20-'21-'22-'23-'24
Weird that mine comes on at 260
Have you really cleaned the radiator and the AC condenser? Chit gets up there easy and that requires a good blow job from the engine side. You are not alone hitting those temps and a lot of those solve there problem just by cleaning the radiator and condenser. Others have the car's fans come on earlier as the factory settings are high. I've done this to my supercharged 99 and she runs a cool 190-200, even when doing 150 mph (disclaimer to all cops, i was doing the speed limit)
Have you really cleaned the radiator and the AC condenser? Chit gets up there easy and that requires a good blow job from the engine side. You are not alone hitting those temps and a lot of those solve there problem just by cleaning the radiator and condenser. Others have the car's fans come on earlier as the factory settings are high. I've done this to my supercharged 99 and she runs a cool 190-200, even when doing 150 mph (disclaimer to all cops, i was doing the speed limit)
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Melting Slicks
Joined: Sep 2006
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From: Iowa
There isn't a warning indicator for engine oil temp. My track car sees 293F regularly on track days.
However, there IS an over temp warning for the transmission oil. That one comes on at 280F.
If you're talking coolant temp, the warning for that comes on at 260F. I tested that one as well last year in my supercharged C5Z. Sheared the PS/Alternator bracket on a 1/2 mile event and I lost the water pump.
However, there IS an over temp warning for the transmission oil. That one comes on at 280F.
If you're talking coolant temp, the warning for that comes on at 260F. I tested that one as well last year in my supercharged C5Z. Sheared the PS/Alternator bracket on a 1/2 mile event and I lost the water pump.
Last edited by Quickshift_C5; Jul 20, 2020 at 03:24 PM.
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St. Jude Donor '20-'21-'22-'23-'24
Damn that's a sucky failure.
Surprised there isn't a temp warning for the oil. I was always told 280 so I figured I'd just never hit it because of my oil cooler. I stand corrected, if so.
Surprised there isn't a temp warning for the oil. I was always told 280 so I figured I'd just never hit it because of my oil cooler. I stand corrected, if so.
Le Mans Master
Joined: Jun 2016
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From: Cincinnati, OH
How are you seeing oil temps? There is no onboard oil temp gauge, only coolant. Or do you have a separate oil temp gauge?
If coolant....clean out the radiator and condenser. Also make sure you have the front air damn installed on the car to direct air up into the radiator opening. C5's suck up a lot of crap into the radiator opening.
If coolant....clean out the radiator and condenser. Also make sure you have the front air damn installed on the car to direct air up into the radiator opening. C5's suck up a lot of crap into the radiator opening.
Last edited by smitty2919; Jul 20, 2020 at 04:15 PM.
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