That's my range in bumper to bumper or stop and go on a hot summer day.
2004 c5
Team Owner
Joined: Jan 2007
Posts: 29,063
Likes: 1,839
From: cookeville tennessee
The 235 is a little hot. But if it was 100 deg + out in traffic with the air on then no...I have aftermarket rad/also fans I run 210 to 220 in 100+ in traffic with the air on..You may need to have the rad cleaned out and new coolant put in.... Robert
Pro
Joined: Aug 2008
Posts: 704
Likes: 101
From: Duluth MN
Thread Starter
Cruising
Joined: Nov 2012
Posts: 11
Likes: 0
From: chandler arizona
Under what conditions is it running 198 and under what conditions is it running 235?
Have you checked the fans??? Standard temp for the fans to go on is low speed mode is 225 degrees. (BOTH fans operate in either low speed or high speed modes. If you have only one fan running (or none) then you have either fuse or relay issues (Fuses 14, 46 and 49 and relays 43, 44 and 45 in the engine compartment fuse box). If the engine cools to 219 degrees the fans (both) go off. If the engine temp reaches 235 degrees then both fans go on in high speed mode. If the engine temp drops to 226 degrees then the fans revert to low speed mode. The fans are commanded OFF is the vehicle speed exceeds 35mph irrespective of engine temp. GM apparently feels that air flow through free wheeling fans is a better setup than running the fans above 35mph.
You should also check the coolant level as well as the condition of it. If it has never been changed, it past due. Owners manual says 5 years or 150K miles WHICH EVER COMES FIRST.
Have you checked the fans??? Standard temp for the fans to go on is low speed mode is 225 degrees. (BOTH fans operate in either low speed or high speed modes. If you have only one fan running (or none) then you have either fuse or relay issues (Fuses 14, 46 and 49 and relays 43, 44 and 45 in the engine compartment fuse box). If the engine cools to 219 degrees the fans (both) go off. If the engine temp reaches 235 degrees then both fans go on in high speed mode. If the engine temp drops to 226 degrees then the fans revert to low speed mode. The fans are commanded OFF is the vehicle speed exceeds 35mph irrespective of engine temp. GM apparently feels that air flow through free wheeling fans is a better setup than running the fans above 35mph.
You should also check the coolant level as well as the condition of it. If it has never been changed, it past due. Owners manual says 5 years or 150K miles WHICH EVER COMES FIRST.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Melting Slicks
Joined: Jan 2007
Posts: 3,021
Likes: 133
From: Conejo Valley CA
Indeed. If you don't like these temp's, get a Dewitts radiator. With it, on the hottest summer day in Southern California, I barely break 200.