Overheating Problem
Thread Starter
Racer
Joined: Jun 2003
Posts: 292
Likes: 13
From: Houston Tx
Overheating Problem
My 95 has been overheating. At first I thought it might be the water pump, however It it does not appear to be leaking any coolant. If I drive more than a couple of miles the temperature maxes out and the overflow tank is gushing out coolant. I replaced the thermostat, thinking that it might be sticking, but no luck..it still does the same thing. Any other thoughts? 
Drifting
Joined: Mar 2005
Posts: 1,923
Likes: 0
From: GA
Is the overflow tank bubbling? Try starting the car and let it idle until it warms up. Then look at the overflow tank, if there are lots of air bubbles pumping into it you probably have a blown head gasket.
Melting Slicks
Joined: May 2005
Posts: 2,730
Likes: 1
From: Atoka Oklahoma
St. Jude Donor 06
Originally Posted by Morley
Is the overflow tank bubbling? Try starting the car and let it idle until it warms up. Then look at the overflow tank, if there are lots of air bubbles pumping into it you probably have a blown head gasket.
also make sure radiator and condensor are clean. plugged up cores can cause all kinds of problems.
Thread Starter
Racer
Joined: Jun 2003
Posts: 292
Likes: 13
From: Houston Tx
If it were a head gasket, then wouldn't coolant be getting into the oil? Also, could it still be the water pump has stopped even though it is not leaking? How can I check to see if is the water pump?
Drifting
Joined: Mar 2005
Posts: 1,923
Likes: 0
From: GA
Originally Posted by 95Torch
If it were a head gasket, then wouldn't coolant be getting into the oil? Also, could it still be the water pump has stopped even though it is not leaking? How can I check to see if is the water pump?
One way to check is to remove the thermostat and put the water neck back on, open the radiator cap and start tha car. If you see coolant circulating through the radiator, the pump is working (some at least).
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Are your electric fans coming on? Also did you bleen any air out of the system? There is a bleeder valve on top of the thermostat housing. When you refill the system, very carefully open the bleeder to bleed any air out of the system. Be careful about dribbling coolant down onto the Opti. I usually wrap some rags around that area when I do this. If there is air trapped in the system it may cause it to be air locked and then it can over heat because of coolant flow problems.
Last edited by tjwong; Jun 22, 2005 at 10:15 AM.
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Intermediate
Joined: Oct 2003
Posts: 27
Likes: 0
From: Bellevue WA
c-4 overheating
I support Green dragon suggestion. At top of Eisenhower Tunnel in 50th Reunion caravan, one of our cars, a ZR-1 overheated. Going downhill on the otherside it overheated. Problem? Radiator cap was not holding presssure. Rekplaced it. Drove the rest of the 2000 miles without a problem.
