Welcome to the Corvette Forums at the Corvette Action Center!

Coolant Issues

S

skrud13

Guest
I am having a problem with my coolant levels and the engine overheating. I have an '88 that seems fine when I first get into it in the morning. I check the coolant level and it is right at the edge of the filler neck on the radiator and the overflow is right at the correct level. Once it heats up, the low coolant light comes on. After that, the temp goes up and down and the coolant temp goes up and down dramatically (190 - 255). I assume that there is a large bubble/void in the coolent, but everytime I open the radiator, the level is right at the top. I tried running it up to temp with the cap off and adding water as the level drops, but the hot spatter makes it near impossible to see if the level is low or not. Some have said run it with the RPM at 2000 while you add fluid as needed, but that is near impossible as well since a ton of antifreeze flows out during warm up. Any suggestions? I am nearly out of patience.
 
Joined
Jan 15, 2004
Messages
2,240
Location
Northern Indiana
Corvette
1987 Z52 Black Convertible
Hmm... when I do that to mine and run it at about 1500 or higher the level always drops as I add fluid till its full then I cap it. How long are you running it at 2000 to check for air pockets?
 

Robertwav1

Well-known member
Joined
Jan 7, 2003
Messages
813
Location
Ocala, Florida
Corvette
1993 Blue
I am having a problem with my coolant levels and the engine overheating. I have an '88 that seems fine when I first get into it in the morning. I check the coolant level and it is right at the edge of the filler neck on the radiator and the overflow is right at the correct level. Once it heats up, the low coolant light comes on. After that, the temp goes up and down and the coolant temp goes up and down dramatically (190 - 255). I assume that there is a large bubble/void in the coolent, but everytime I open the radiator, the level is right at the top. I tried running it up to temp with the cap off and adding water as the level drops, but the hot spatter makes it near impossible to see if the level is low or not. Some have said run it with the RPM at 2000 while you add fluid as needed, but that is near impossible as well since a ton of antifreeze flows out during warm up. Any suggestions? I am nearly out of patience.

Try running it without the thermostat?
 

Corvette Forums

Not a member of the Corvette Action Center?  Join now!  It's free!

Help support the Corvette Action Center!

Win Both Corvettes!

Win Both Corvettes and Get Extra Bonus Tickets Now!

Supporting Vendors

Dealers:

MacMulkin Chevrolet - The Second Largest Corvette Dealer in the Country!

Parts/Accessories:

Dead Center Foundation

Vetteskins

Advertise with the Corvette Action Center!

Partners

Top Bottom