C5 High Temperatures

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May 22, 2008 | 08:19 PM

#21

thetaxman

Race Director

Joined: Jan 2007

Posts: 16,513

Likes: 4

From: Official Dirty Dozen Member

Quote:

Originally Posted by BlackZ06

And without fans you will still overheat if the car isn't moving. It'll just take a few moments longer .....

There are hundreds (thousands) of Corvettes driving around in places like Phoenix and Las Vegas in 100 plus degree weather with the stock radiator ... they have the A/C on and are running just fine.

I've run my car on the track at Willow Springs in 100 plus weather and had no problems. Now that was admittedly an HPDE ... if I had been racing I'd most likely upgrade to something like a DeWitt .... but for street driving the stock radiator is just fine.

my fans temp control is stock
in 108 temp last year is ran at 195 at idle in stop and go traffic

192 at 90 mph on the same day

I want decent temp, too cold hurts almost as much as too hot.
I'll go with my big radiator any day

May 22, 2008 | 10:24 PM

#22

0Tom@Dewitt

Former Vendor

Joined: Jan 2000

Posts: 5,593

Likes: 631

From: Brighton

Quote:

Originally Posted by fsuforever

Spal makes a fans for our c5s that pull twice the cooling capacity than the stock ones ,someone else has mentioned the aftermarket fans,I know Ecs sells these Spal Fans For the C5 for 129.00 a fan, i would put the 2 spal fans in if your tight on money ,u May have to drill a hole or 2 in the old Shroud but it will get the job done & its cheaper than a new Dewitts Radiator ,also if u havent had the car tuned & are or wanting to add some mods to the car, u can have your tuner set the fans on @ 180 instead factory settings ,which i think is 220 any how good Luck with your problem ,its an easy fix

I don't know about the "drill a hole or 2" because we have to completely cut the old fans out and pop-rivet the new spals on.
Here is our package...

http://www.dewitts.com/pages/product...asp?ProdID=378

May 23, 2008 | 12:12 AM

#23

gpracer1

Le Mans Master

Joined: Feb 2006

Posts: 5,267

Likes: 40

From: Phoenix AZ

I love it when info comes straight from the horses mouth

May 23, 2008 | 01:14 AM

#24

nuck

Burning Brakes

Joined: Feb 2004

Posts: 1,231

Likes: 0

From: edmonton ab

I have 160 degree tstat and fans are reprogramed low and my car still gets up to 220-230 in creeping traffic at 70-75 F. Mine is an 02. I had zero cases of my 03Z ever getting warm and that was driving on 100 degree days

May 23, 2008 | 01:21 AM

#25

azZ06Mike

Melting Slicks

Joined: May 2007

Posts: 2,652

Likes: 0

From: Peoria Arizona

St. Jude Donor '11

my 03 did this and i resolved it like this!

hypertech 185 t-stat! radiator flush! And had local tuner adjust when my fans come on and off! now highest it gets is 210 only once in awhile here in AZ!

Aug 24, 2008 | 02:53 PM

#26

ironpig

2nd Gear

Joined: Nov 2005

Posts: 2

Likes: 0

hey guys i have a 1997 c5 .temp go goes high as 230-235 ,purchase a dewitt radiator no change please help anyone

Aug 24, 2008 | 06:32 PM

#27

Bill Dearborn

Tech Contributor

Joined: Oct 1999

Posts: 40,995

Likes: 9,759

From: Charlotte, NC (formerly Endicott, NY)

Quote:

Originally Posted by 2001_C5

So I've scoured the threads to make sure I've captured all the forum advice first before posting my issue. I have a 2001 with about 50K miles.

At idle or slow speeds, my temperature shoots up to its limits 225 & 235but the fans kick in as they're supposed to and reduce the temperature but I hold my breath watching it vascillate in stop & go traffic. At cruise speeds, I am at a cool 190. So conventional wisdom says it is not an air flow issue.

I've been trouble shooting this problem for a while now.
Here's what I've done so far in no specific order:

Checked both fans; they operate as designed
No DIC codes, digital temperature agrees with analog
Checked the radiator for debris
No leaks seen on coolant lines or radiator + no loss of coolant over time
Flushed the system twice now, the second time after I replaced the stock thermostat since it was a cheap part
Checked to make sure the water pump hoses were hot

What is my next step? I suspect that it still might be a water pump but is there a good check for this? It doesn't look like a hard procedure to replace it.

Thanks folks

There is nothing to do, you do not have a problem. Stop watching the gauge and pay attention to blonde in the car next you. If this was 1969 and you were running a Chevy Big Block you would have a problem but it is 39 years later and cars run at these temps now.

Bill

Last edited by Bill Dearborn; Aug 24, 2008 at 06:36 PM.