C-5 overheat???????????????????
Thread Starter
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
C-5 overheat???????????????????
To be brief: friend called and said his new base engine C-5 is running 230-235 on the heat guage in traffic. On the highway, it cools to 195. Dealer says that's normal. He doesn't believe it and the owners manual is no help.
He says the fans(s) don't come on until 230 degrees. Is this normal? Are the turn on's for the fans staggered depending on heat or do they both come on at the same time?
I know squat about c-5's.
Mike
He says the fans(s) don't come on until 230 degrees. Is this normal? Are the turn on's for the fans staggered depending on heat or do they both come on at the same time?
I know squat about c-5's.
Mike
Instructor
Joined: Jul 2003
Posts: 182
Likes: 0
From: Madison MS
St. Jude Donor '08-'10
Re: C-5 overheat??????????????????? (MikeM)
I had this happen on my daughters 2000 Camaro LS1. Checked the coolant and it appeared to be think like a jell. I replaced coolant and thermostat and this corected the problem...
My C5 will run up in the 220's in heavy traffice during the summer...
Hope this helps
My C5 will run up in the 220's in heavy traffice during the summer...
Hope this helps
Pro
Joined: Apr 2003
Posts: 712
Likes: 0
From: Memphis TN
Re: C-5 overheat??????????????????? (MikeM)
Fans do come on at 225. They should already be on if a/c or heater on. This seems a little hot unless idling in traffic or parked at sonic without a/c or heater on.
Thread Starter
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
Re: C-5 overheat??????????????????? (DocToss)
Okay, so do BOTH fans come on at 225 or does one come on sooner than that and then if it can't satisfy then the second one comes on? If the fans are staggered then I could understand the problem.
Mike
Mike
Drifting
Joined: Oct 2003
Posts: 1,540
Likes: 0
From: bloomfield nj
Re: C-5 overheat??????????????????? (MikeM)
first,are you looking at the gauge or the drivers display?if you are looking at the gauge,it's not accurate to the display[gauge off about 8 degrees].both fans come on at 228 degrees[according to the display]and the gauge reads about 235 on my car[03 z06].both fans come on high at 234 degrees and the gauge is at 240.if you had a overheating problem,you would know because the car would go into overheat protection[ecm shuts down 4 cylinders in groups].just my.02
Resident moron
Joined: Jun 2003
Posts: 4,746
Likes: 20
From: Assachusetts
Re: C-5 overheat??????????????????? (dpd)
I'd check the coolant just to be safe (maybe a little low, or might be contaminated) but it's probably fine.
Fans both come on around 225, then go into high speed around 235 (you can really hear them at that point), as others have already said.
If it's hot out and you're creeping around, 220s is not uncommon.
Dope
Fans both come on around 225, then go into high speed around 235 (you can really hear them at that point), as others have already said.
If it's hot out and you're creeping around, 220s is not uncommon.
Dope
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Former Vendor
Joined: Apr 2001
Posts: 10,976
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From: FL
St. Jude Donor '13
Re: C-5 overheat??????????????????? (MikeM)
With the A/C off,low speed fans come on at 226-228 depending on model year.With the A/C off,high speed fans come on at 235.
Temp should not go over 230,and if the high speed fans are coming on something is wrong :yesnod:
With the A/C on fans run all the time and shold never come close to 225...
Temp should not go over 230,and if the high speed fans are coming on something is wrong :yesnod:
With the A/C on fans run all the time and shold never come close to 225...
Team Owner
Joined: May 2001
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Re: C-5 overheat??????????????????? (C-5 TECH)
Also don't forget to check the obvious: plastic/paper bag sucked up in front of radiator, partially blocking air flow. :yesnod:
Robert
Robert
Burning Brakes
Joined: Sep 2003
Posts: 764
Likes: 0
From: South Florida
Re: C-5 overheat??????????????????? (MikeM)
Program your fans lower.
And always check your front of radiator for debris that could obstrucked air.
If coolant is under 100k,then it's not that at all.
A sticky thermostate???
And always check your front of radiator for debris that could obstrucked air.
If coolant is under 100k,then it's not that at all.
A sticky thermostate???
Le Mans Master
Joined: Jan 2003
Posts: 6,298
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From: Tyler TX
Re: C-5 overheat??????????????????? (LoneStarFRC)
Also don't forget to check the obvious: plastic/paper bag sucked up in front of radiator, partially blocking air flow. :yesnod:
Robert
Robert
Melting Slicks
Joined: Jan 2004
Posts: 3,225
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From: Currently living in and loving... Chico, CA
Re: C-5 overheat??????????????????? (kumar75150)
Greetings, all,
Just bought a new 2004 'Vette and joined this great forum. Hope I can be of some help here.
The Helm manual for my 2004 states that the low speed cooling fan is commanded on at 226 degrees F and off at 219 degrees F coolant temperature. The high speed fan is commanded on at 235 degrees F and off at 226 degrees F coolant temperature. When the A/C is on and coolant temperature reaches 185 degrees F, the low speed cooling fan will be turned on at vehicle speeds less than 35 mph.
This is why I always run the A/C when I'm driving in town, outside temperature permitting; it keeps things nice and cool under the hood. But that's not possible below about 37 degrees F, and I did once go to 220 degrees F while driving slowly up a 4000 foot mountain in 32 degree F weather. I did not like that! :mad
Just bought a new 2004 'Vette and joined this great forum. Hope I can be of some help here.
The Helm manual for my 2004 states that the low speed cooling fan is commanded on at 226 degrees F and off at 219 degrees F coolant temperature. The high speed fan is commanded on at 235 degrees F and off at 226 degrees F coolant temperature. When the A/C is on and coolant temperature reaches 185 degrees F, the low speed cooling fan will be turned on at vehicle speeds less than 35 mph.
This is why I always run the A/C when I'm driving in town, outside temperature permitting; it keeps things nice and cool under the hood. But that's not possible below about 37 degrees F, and I did once go to 220 degrees F while driving slowly up a 4000 foot mountain in 32 degree F weather. I did not like that! :mad
Burning Brakes
Joined: Jan 2004
Posts: 1,243
Likes: 6
From: Rowlett Texas
Re: C-5 overheat??????????????????? (MikeM)
I encountered the same problem with my 2001 coupe driving in rush hour stop and go Dallas traffic. I took it to a local Corvette specialty shop where they put in a 170 degree thermostat and made an adjustment to the computer. Problem solved.
Hope that's some help.
Hope that's some help.
Safety Car
Joined: May 2003
Posts: 3,814
Likes: 105
From: Dearborn Heights Michigan
Re: C-5 overheat??????????????????? (MisterC)
:iagree: Helm info is correct, one additional piece from Spring 2003 Corvette Quarterly Magazine states that C5 normal operating range is 200-210.
Fred K.
Fred K.