I have had this car for 2weeks already, it did not overheat when i got it till now. The temp goes up more than 3/4 what might be wrong? the previous owner said the car had the engine head rebuilt it only has 65k miles on the engine. Its an auto gs btw

 

low coolant level? did u check howo much fluid u got? crack in the radiator? could be lots of stuff. research. and more info would h elp

 

Check coolant level, might be low, or even old, do a flush, bleed the system of all air bubbles. Also perhaps you have bad radiator cap, bad thermostat. You can also clean the fins on the radiator, if it is covered with bugs that can have a bad effect on the radiator's cooling ability.

 

the coolant level is fine it didnt leak any coolant or anything, i checked it how do you bleed the cooling system? could they have rebuilt the head wrong or something which is causing it to overheat?


Modified by Ricky616 at 3:03 PM 1/7/2008

 

get a new t-stat and radiator cap

to ghetto bleed the system, let the car cool off (which would be a good time to replace the t-stat) then take of the old cap...start the car and let it warm up, this will purge the air out

 

my uncles car has 80k on his 94 ls timing belt snapped..was replaced..then started overheating..found out that when the belt snapped the piston hit the valve when the valves froze...so if its a rebuilt make sure they did it properly

 

Since the head, they may have used the same head gasket which was no good and now you're driving with a blown head gasket. Have you tried to hammer it while driving? Does it smoke ANY at all? If it does, I would guess the headgasket is bad...

Other things you might want to check are:

-Coolant level (as mentioned above)
-Thermostat (replace if necessary, cheap)
-Does does your radiator fan work at all (should come on twice before car reaches normal operating temperature, I think)?
-Check for cracks on the radiator (even though you don't see coolant on the ground under the car, the radiator or other component could still be leaking)


To flush the radiator, disconnect the top and lower hoses and pull out the plug at the bottom of the radiator. It's plastic plug, usually resembling a wing nut. Twist it out and your antifreeze will pour out. Once it's all out, stick a water hose in the top of the radiator and flush it until clean water comes out. put the plug back in, and reconnect the hoses, and refill the capacity. I think it's roughly like 2 5 quart containers of antifreeze to refill.

 

If the thermostat goes bad doesn't it fail open?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tomithy &raquo;</TD></TR><TR><TD CLASS="quote">If the thermostat goes bad doesn't it fail open?</TD></TR></TABLE>

no not always...only the failsafe ones

 

could be air pockets or thermostat,