Overheating Slowly
Thread Starter
Advanced
Joined: Sep 2009
Posts: 95
Likes: 0
From: Pittsburgh/Butler PA
Overheating Slowly
So my car has recently started overheating very slowly in stop and go traffic. When I am traveling down the highway it runs around 195. But once I stop, after about 20 min of being in traffic, it slowly starts to climb up to the point where it overheats. It has all new coolant in there and it is burped. Radiator is clean of debris. Could it be a thermostat?
Any ideas on this as I am stumped. Thanks.
Any ideas on this as I am stumped. Thanks.
Le Mans Master
Joined: Jan 2007
Posts: 7,364
Likes: 6
From: Rocky Mount Virginia
So my car has recently started overheating very slowly in stop and go traffic. When I am traveling down the highway it runs around 195. But once I stop, after about 20 min of being in traffic, it slowly starts to climb up to the point where it overheats. It has all new coolant in there and it is burped. Radiator is clean of debris. Could it be a thermostat?
Any ideas on this as I am stumped. Thanks.
Any ideas on this as I am stumped. Thanks.
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
So my car has recently started overheating very slowly in stop and go traffic. When I am traveling down the highway it runs around 195. But once I stop, after about 20 min of being in traffic, it slowly starts to climb up to the point where it overheats. It has all new coolant in there and it is burped. Radiator is clean of debris. Could it be a thermostat?
Any ideas on this as I am stumped. Thanks.
Any ideas on this as I am stumped. Thanks.
Thread Starter
Advanced
Joined: Sep 2009
Posts: 95
Likes: 0
From: Pittsburgh/Butler PA
Le Mans Master
Joined: Mar 2004
Posts: 8,700
Likes: 298
From: Ft. Lauderdale Fl
You may want to check or do the following:
1. Replace the pressure/radiator cap.
2. Check or replace the hoses.
3. Check or replace the thermostat.
4. Clean the area between the A/C and radiator...check for debris.
5. Do a full system flush and replace with 50/50 blend of DexCool & distilled water.
6. Check and make sure the fans run with the A/C on. (fuse or relay)
Check the above......
1. Replace the pressure/radiator cap.
2. Check or replace the hoses.
3. Check or replace the thermostat.
4. Clean the area between the A/C and radiator...check for debris.
5. Do a full system flush and replace with 50/50 blend of DexCool & distilled water.
6. Check and make sure the fans run with the A/C on. (fuse or relay)
Check the above......
Racer
Joined: Oct 2010
Posts: 450
Likes: 18
From: NORTHPORT NY
After you diag. The problem you might want to install a temp
control for the fan. I installed a derale unit it was
under 30.00 and only a couple of wires. I adjusted it to turn low speed fans on at 200 degrees . Works great the car doesnt go much over 200 degrees.
control for the fan. I installed a derale unit it was
under 30.00 and only a couple of wires. I adjusted it to turn low speed fans on at 200 degrees . Works great the car doesnt go much over 200 degrees.
Thread Starter
Advanced
Joined: Sep 2009
Posts: 95
Likes: 0
From: Pittsburgh/Butler PA
You may want to check or do the following:
1. Replace the pressure/radiator cap.
2. Check or replace the hoses.
3. Check or replace the thermostat.
4. Clean the area between the A/C and radiator...check for debris.
5. Do a full system flush and replace with 50/50 blend of DexCool & distilled water.
6. Check and make sure the fans run with the A/C on. (fuse or relay)
Check the above......
1. Replace the pressure/radiator cap.
2. Check or replace the hoses.
3. Check or replace the thermostat.
4. Clean the area between the A/C and radiator...check for debris.
5. Do a full system flush and replace with 50/50 blend of DexCool & distilled water.
6. Check and make sure the fans run with the A/C on. (fuse or relay)
Check the above......
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Racer
Joined: May 2009
Posts: 279
Likes: 4
From: Cincinnati OH
I had an issue with slow coolant loss that caused similar symptoms. I found a small crack in the plastic tube on top of the coolant resevior tank that the rubber hose connects to (leak was under the hose and coolant was dripping out). Not sure if this is a common failure, but I thought I would mention it.
