i own a 1993 pontiac trans am and lately it started to overheat. I replace the water pump and also clean the radiator. A mechanic came by and told me that it could be the radiator cap. I bought a new radiator cap and ran the car for like about a week. then again it started to overheat, but now it only overheats when i push hard on the accelerator. When that happen my dad purged it and told me that a lot of air had gone in. what can the problem be??? oh by the way i check the oil and their is no water in it also no oil in the radiator so i am guessing its not the head gaskets.
2007-05-27 11:41:14 · 18 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
by the way i bought a new thermostat and just had to take it off cause it got worst with the thermostat.
2007-05-27 12:50:46 · update #1
take it to the shop (do not go at high speed while driving there) :)
2007-05-27 11:49:48 · answer #1 · answered by llama4240 3 · 1⤊ 0⤋
The thermostat would be the most likely problem. It should only cost about ten to fifteen dollars for the thermostat and gasket. If not you may have a clog in the radiator. Take the rad cap off and let the car warm up. Check to see that the coolant is flowing good. The last thing to check would be the fan. When it is at normal operating temp rev the engine and see if the fan comes on. If not the check the fuse and fan assembly. Good luck.
EDIT: If the thermostat is new and you have good flow through the radiator, then I would go get the combustion gas test done.
2007-05-27 12:04:41 · answer #2 · answered by jd 3 · 0⤊ 0⤋
Well without seeing it i would say this to check it. #1 at operating temp wait for the fan to come on.This works with out driving it. #2 At operating temp with the fan coming on (turn off engine) touch radiator in different areas to see if there are cold spots. (Restricted) #3 If this all is ok touch with a rag protecting your hand the upper and lower hose. The upper should be the warmest and the lower the coolest. *this checks flow. Also if you have recently (prior) to the problem done any servicing of the cooling system not bled the system of air properly there could be pockets of air which will not transfer excess heat to the coolant. There is a bleed valve near the thermostat housing for this purpose. It takes about half and hour of running time to burp the system,with a special funnel. If you have a special vaccuum filler system this could be done in 2-4 mins.
2007-06-04 02:34:09 · answer #3 · answered by wreck and rust 2 · 0⤊ 0⤋
Listen to Rat on this one, sounds like possible combustion in the cooling system. A head gasket can fail or a head crack, and still put no oil in the antifreeze, just combustion pressure.
2007-05-27 12:11:18 · answer #4 · answered by Anonymous · 1⤊ 0⤋
It could be the head gasket anyway. Have your mechanic do a combustion gas test on the cooling system. That will determine it for sure.
2007-05-27 11:46:02 · answer #5 · answered by rat396 4 · 2⤊ 0⤋
Head gasket.
There is a compression leak (not blown)between the combustion chamber, and cooling jacket. Which by the way negates oil contamination (for now).
Oh, it's only going to get worse....
2007-05-27 12:09:18 · answer #6 · answered by Mr. KnowItAll 7 · 1⤊ 0⤋
try your thermostat it may not be opening all the way or at all to test the thermostat take it out boil some water wait till its is boiling and drop it in if it opens you know that that's not it but i would almost put money on it
2007-06-03 08:32:37 · answer #7 · answered by 85 MONTE SS 2 · 0⤊ 0⤋
You ever think maybe the thermostat is just on its last leg? Or...now call me crazy....but if it only happens when you really get on the accelerator.....Ummmm...Don't go lead-footing around like a moron. Or maybe the gauge is bad...maybe these simple easy things are what you should have looked at before you started replacing things...but thats just me...what do I know?
2007-05-27 11:45:26 · answer #8 · answered by Anonymous · 0⤊ 1⤋
Has any one check the fans. I am suspecting thats maybe the electric fans are done. Its a 93 car and they very well be not working right.
2007-06-01 16:59:06 · answer #9 · answered by asccaracer 5 · 0⤊ 0⤋
have yu tried changing the thermostat? it needs changing every so many years in certain vehicles. it works for cold or hot
2007-05-27 11:50:48 · answer #10 · answered by koontzfan50 2 · 0⤊ 0⤋
you dont have any thing blocking the radiator due you or are your cooling fans working? could be cracked head also
2007-06-01 12:04:58 · answer #11 · answered by miwiki 2 · 0⤊ 0⤋