1995 Corvette Overheating

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Paul J. Veres - 14 Mar 2007 14:04 GMT

I have a 1995 corvette, and when I stop at a traffic light, the temperature
gauge goes to 235 degrees. As soon as I start back up, it goes down to 210
degrees after about 1/2 mile. The yesterday the temperature was 70
degrees outside when this happened. I bought this car in December, 2006
when it was colder outside, and didn't have these readings when it was
colder. Is this quick temperature change normal for this vehicle when the
temperature gets warmer outside? If not, what could be the possible
problems?

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PJ - 14 Mar 2007 14:25 GMT

> I have a 1995 corvette, and when I stop at a traffic light, the temperature
> gauge goes to 235 degrees. As soon as I start back up, it goes down to 210
[quoted text clipped - 4 lines]
> temperature gets warmer outside? If not, what could be the possible
> problems?

Little on the warm side for a late C4 and just a bit slower
coming down than usual.

Turn on the A/C -- temp should drop.

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PJ
'89 auto coupe, '02 6-spd coupe

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Charlie - 14 Mar 2007 14:33 GMT

Flush the system and put in new coolant, add water wetter or purple ice to
the system. Bleed the air out of the system at both bleed screws. Check to
make sure both radiator cores are clean, they have a tendency to get paper
and stuff stuck in them and restrict air flow.

Charlie
1993 Polo Green Vert.

>I have a 1995 corvette, and when I stop at a traffic light, the temperature
>gauge goes to 235 degrees. As soon as I start back up, it goes down to 210
[quoted text clipped - 4 lines]
>temperature gets warmer outside? If not, what could be the possible
>problems?

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Dad - 14 Mar 2007 15:51 GMT

> Flush the system and put in new coolant, add water wetter or purple ice to the
> system. Bleed the air out of the system at both bleed screws. Check to make
[quoted text clipped - 3 lines]
> Charlie
> 1993 Polo Green Vert.

What Charlie said, it's a bottom feeder and will suck noticeable amounts of
trash into the radiator. It's unbelievable what it will pickup, cigarette butts,
wrappers, and leaves. Clean that before you do anything and then have the PH of
your coolant checked, six years is pushing it's life span.

Signature

Dad
05 C6 Silver/Red 6spd Z51
72 Shark Black/Black/4spd
64 Red/red/white top/4spd

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'Key - 14 Mar 2007 20:26 GMT

>I have a 1995 corvette, and when I stop at a traffic light,
>the temperature gauge goes to 235 degrees. As soon as I
[quoted text clipped - 6 lines]
>warmer outside? If not, what could be the possible
>problems?

like some others have said,
make sure your coolant is flowing correctly
and there is no debre blocking your radiator.

my 84 / c4 use to do that.
I put a manual fan switch I can turn on anytime its
necessary.

my2¢

Signature

"Key"
=====

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egg.net@sympatico.ca - 15 Mar 2007 02:39 GMT

Your description suggests insufficient airflow if car not moving.
Possible causes for overheating from shop manual for conditions "
engine temp lamp on or temp gauge shows hot". 1) Loss of coolant. 2)
Loss of system pressure. 3) Belt tension too low. 4) Timing retarded
by malfunctioning ignition control system. 5) Damaged coolant pump
drive assembly. 6) Radiator fins obstructed. 7) Cooling system
passages blocked. 8) Recovery reservoire hose pinched or kinked. 9)
Cooling fans inoperative. 10) Thermostat stuck in closed position.
11) Malfunctioning coolant pump; eroded or broken impeller blades.
12) Incorrect radiator. 13) Missing or damaged radiator upper air
deflector and/or center air deflector. Other things that come to
mind: Engine coolant temperature sensor malfunction ( located on
underside of water pump) . Cooling fans inoperative.
You may be able to check some of the simpler items yourself. Also
check if you're losing or are missing coolant. After that, you'll
probably need to check with a garage. Good luck.

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