2002 Z06 corvette
Enjoy while you can.
Joined: May 2008
Posts: 18,237
Likes: 3,365
From: 10th District Court OHIO
Ohio Events Coordinator
2025 Corvette of the Year Winner - Unmodified
2024 C2 of the Year Winner - Unmodified
2023 C8 of the Year Finalist - Unmodified
2022 C2 of the Year Finalist - Unmodified
2019 C2 of Year Finalist (stock)
St. Jude Donor '14 thru '26
Team Owner
Joined: Jul 2016
Posts: 25,303
Likes: 1,683
From: The Steel City, Colorful Colorado
Winner 2020 C7 of the Year - Modified
Welcome to the CF!
Administrator
Joined: Mar 2001
Posts: 368,611
Likes: 24,865
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '26
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Moving this to C5 Tech.
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 540
From: Kelowna BC
The fans only operate at low speeds, and you're not having low speed problems. So my guess is either the rad is clogged (potentially between) or there is something blocking air flow thru the front of the car. Are the air dams all in place?
Thread Starter
8th Gear
Joined: Jun 2017
Posts: 8
Likes: 0
Yes i checked all that, i was going to change the thermostat next.
Thread Starter
8th Gear
Joined: Jun 2017
Posts: 8
Likes: 0
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
Safety Car
Joined: Mar 2016
Posts: 3,534
Likes: 432
From: Atlantic Beach FL.
The radiator gets it air from the bottom. You would be supersized at how much trash gets in the cooling fins.
Are both of your fans coming on when the engine is warm?
Otherwise your thermostat could be stuck closed.
Are both of your fans coming on when the engine is warm?
Otherwise your thermostat could be stuck closed.
Safety Car
Joined: Mar 2016
Posts: 3,534
Likes: 432
From: Atlantic Beach FL.
^I read one of your post about the air issue. I was wondering why mine didn't do that. I do think I heard a burping sound when I took a hard right turn though.
Did you burp yours out of the throttle body steam tube?
Did you burp yours out of the throttle body steam tube?
Safety Car
Joined: Mar 2016
Posts: 3,534
Likes: 432
From: Atlantic Beach FL.
Mine didn't come with a rear steam tube. I might have air in the system without knowing it because I had my temps lowered when I got my tune. Now that I think of it the air may have purged out when I replaced the coolant sending unit. My first one failed after a few weeks and it is located high enough on the head. Mine runs under 200 in Florida with A4 trans and no other trans cooler.
Last edited by Rob 02; Jun 9, 2017 at 01:38 PM.
Thread Starter
8th Gear
Joined: Jun 2017
Posts: 8
Likes: 0
yes both fans are coming on. i will check for those things this afternoon
Thread Starter
8th Gear
Joined: Jun 2017
Posts: 8
Likes: 0
Some how I'm hard pressed to think the issue is clogged radiator fins if the temp drops at cruise speed when the fans are likely running but rises at highway speeds where air flow through the radiator should provide much better cooling than the fans do at low vehicle speeds.
And it seems to me that if the T'stat was stuck closed the heating problem would constantly exist and not just at higher vehicle speeds. The fact that the temps come down when returning to lower vehicle speeds suggests that there is coolant flow occurring.
I suspect that there is air in the cooling system. I had very similar issues when there was trapped air in my cooling system. JMHO
And it seems to me that if the T'stat was stuck closed the heating problem would constantly exist and not just at higher vehicle speeds. The fact that the temps come down when returning to lower vehicle speeds suggests that there is coolant flow occurring.
I suspect that there is air in the cooling system. I had very similar issues when there was trapped air in my cooling system. JMHO
what you think i should check for?
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Interesting. I have never had an air in the coolant issue with my car. However, every time I have touched the coolant my car has had the front up on blocks so the car is at an angle. Wondering if you guys would have as many issue getting the air out if you were up on ramps.
Safety Car
Joined: Mar 2016
Posts: 3,534
Likes: 432
From: Atlantic Beach FL.
I don't use ramps but I have to lower the back end first when taking it down from jack-stands. If you lower the front first there isn't enough clearance.
Good point vettenuts. Maybe all you need is to jack the front of the car up to burp.
Good point vettenuts. Maybe all you need is to jack the front of the car up to burp.
