C5 overheating - Corvette Forum : DigitalCorvettes.com Corvette Forums
Go Back   Corvette Forum : DigitalCorvettes.com Corvette Forums > C5 Corvette Forums > C5 Corvette - General Discussion
Register Forums Garage Garage Mark Forums Read Auto EscrowInsurance Advertise


C5 Corvette - General Discussion General | Technical | Performance | Aftermarket | Discussions

Other sections:
Corvettes Classifieds
Corvette Detailing & Car Care
Corvette Audio/Video/Radar
General Automotive/Shop/Tools
Corvette Performance Driving/Racing

Custom Image Corvettes
A&A Corvette
Corvette tuner

Corvette aftermarket products


Parts & Products
Race Ramps
Melrose Motorsports
Parts Taxi
Pfadt Racing
Madvette Motorsports
Hi-tech Custom Concepts
Corvette Garage
Corvette Parts and Accessories
Corvette Car Care Products
Corvette HID

Bob Bondurant School of High Performance Driving
Corvette driving school

Cray Wheels

Thread Tools
Old 07-12-2019, 11:15 AM   #1
DC Crew
Angela's Avatar
Posts: 2
Member #181530
Member since: Jul 2019

Thanks: 0
Thanked 0 Times in 0 Posts
C5 overheating

I live in Arizona, and our summers are very hot, around 110-115 degrees! I've owned this C5 for almost 3 years. And every summer I run into overheating. I have not been able to figure out the problem. Coolant levels are always perfect, relays checked out, both fans come on and they seem to change speeds at the right temperature. I keep the air filter clean and it is a cold air intake system. Most day I can't even make it home; which is about a 20 minute trip "in town," before it reaches 230 degrees. It even runs that hot on an open freeway. During the winter here (if you want to call it a winter), it runs perfect, generally about 200-220 degrees. The only thing I haven't changed is the thermostat. I previously had C4 that ran hot as well, very similar issues, and I had changed out the radiator and thermostat on the C4 without improvement. Other than the thermostat, does anyone have any ideas? Anyone else having the same issues with the LS1?
Angela is offline   Reply w/quote Quick reply to this message
Sponsored Links
Old 07-12-2019, 05:22 PM   #2
The Torch
The Torch's Avatar
Posts: 35,299
Member #799
Member since: Apr 2003
Location: Western Kentucky

My Corvette(s)
2004 Black/Mod Red-Z06

Thanks: 281
Thanked 714 Times in 496 Posts
Is the radiator and AC condenser clean and free of trash to allow good airflow? Is the radiator clogged internally in any way. Even with good airflow if it is clogged it won't cool efficiently. just a few thing to think about
The Torch is offline   Reply w/quote Quick reply to this message
RACING...Because with baseball, football, basketball, tennis, and golf, you only need one ball

I used to think that I had learned patience as I got older. Then I realized that I just didn't give a shit
Old 07-12-2019, 08:04 PM   #3
DC Crew
Angela's Avatar
Posts: 2
Member #181530
Member since: Jul 2019

Thanks: 0
Thanked 0 Times in 0 Posts
They are. I haven't had the radiator flushed. I was wondering about "burping" the radiator. And reservations about trying that?
Angela is offline   Reply w/quote Quick reply to this message
Old 07-18-2019, 08:27 PM   #4
Malibu SS
DC Crew
Posts: 60
Member #175673
Member since: Oct 2017

Thanks: 0
Thanked 4 Times in 3 Posts
Dewitts Radiator. Two core , Aluminum, Give them a call and they will discuss what you need. Sounds like your fans are fine.
Malibu SS is online now   Reply w/quote Quick reply to this message
Old 07-23-2019, 03:44 PM   #5
DC Crew
jrbart's Avatar
Posts: 38
Member #3786
Member since: Nov 2003
Location: las vegas nv. usa

My Corvette(s)
2003 electron blue coupe 2003 millennium yellow coupe

Thanks: 22
Thanked 2 Times in 2 Posts
230 is not that hot, fan high speed doesn't come on until 235 or 240 here in Vegas ours runs about the same as yours.
jrbart is offline   Reply w/quote Quick reply to this message
87 red convertible SOLD 04 black coupe SOLD
Old 07-24-2019, 02:26 PM   #6
The Punisher
DC Crew
The Punisher's Avatar
Posts: 3,950
Member #8506
Member since: Feb 2004
Location: Area 51

My Corvette(s)
'77 coupe (sold), '86 coupe (sold), '98 vert ( sold ) '85 coupe (sold), '00 coupe (sold), '75 vert

Thanks: 176
Thanked 63 Times in 56 Posts
the punisher

I would imagine living in Arizona you would get a lot more sand and dust debris in your radiator and condensor. May want to have it thoroughly cleaned.
The Punisher is offline   Reply w/quote Quick reply to this message
Old 09-09-2019, 03:52 PM   #7
DC Crew
Posts: 1
Member #181732
Member since: Sep 2019

Thanks: 0
Thanked 0 Times in 0 Posts
For $167.00 in ebay I got a aluminium two row radiator and with some easy mods it fit great. I live near 29 Palms with temps near your and with the ac on I run 199 to 207. Stock fans and stock thermostat.
yvzoner is offline   Reply w/quote Quick reply to this message
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Corvette Forum : DigitalCorvettes.com Corvette Forums forums, you must first register.
Please enter your desired user name (12 CHARACTERS MAXIMUM), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
City / State / Country?
Where you live
What kind of Corvette(s) do you own?
This field is not required.
Please select your insurance company (Optional)


Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Powered by vBadvanced CMPS v3.2.2

All times are GMT -6. The time now is 02:41 PM.

Powered by vBulletin® Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
2003-2011, DigitalCorvettes.com - All Rights Reserved