Why is my Car over heating???

Question

ok so my car keeps over heating at fist i thought it was the thermostat so i changed it and the fans running fine it still overheated so i added water to the radiator and it was fine for like two weeks and then it started doing it again all said and done now the water isnt cutting it anymore and the tempature only rises when im driving slow or at idle i didnt blow a head gasket couse my oil isnt gray or silver

I live in hawaii so no cold weather here is thier a way to flush our radiator yourself???/

Answer 1

First of all go cheap first. Replace your rad cap, Water boils at a higher temperature when under pressure i.e if you cap is only holding 5 psi not 15-17psi the coolant or water may boils before your fan is set to come on, causing you vehicle to overheat. Next you check that your rad fan is working? It should be coming
on when you vehicle is overheating at low speed or when you
use you air conditioning. If you fan is working take to rad cap off (when the engine is cold!!). Start the engine and watch for flow through of the rad after the t stat opens. This will also bleed any air from you coolant system that could cause
a vapour lock at your t stat. The rad should start flowing at about
the same time as you rad fan comes on. If you have no flow
there is a blockage ( t stat in upside down??) or you need a water
pump. If there is flow with lots of bubbles (boiling) your head gasket is gone.

HTH

Answer 2

Hi hope I can help, Firstly check all hoses that includes radiator and heating hoses. Secondly check the radiator has no slow leak. thirdly check that the timing is set correctly, Fan belts are not slipping because this could be a clue as to when it is getting hot when you are running slowly. eg not enough air passing through the radiator at speed. It is also possible for your head gasket to have blown without water getting into the oil and vise versa. The best check for this is a pressure test done by a mechanic and dose not cost allot. I tend to think this is the real cause if you have got your engine hot.Hope this helps

Answer 3

Don't know what kind of car you have, but you could still have a bad head gasket. Usually, air is pushed into the cooling system.
When the piston is moving down on the intake stroke, the intake valve is open, so the gasket won't leak water in. On the compression stroke, air is pushed past the bad spot on the gasket into the water journals.
A radiator shop or maybe a repair garage can run a few tests.
1. They can check for fuel contamination in the coolant
2. They can do a pressure leak-down test of the coolant system
3. They can test to see if the system is under a lot of pressure

Normally, you can see bubbling in the overflow tank.

Answer 4

Oil not gray or silver DOES not indicate your Head gasket is not blown.
A blown head gasket not always drop water into the sump but it will blow it out the exhaust.
First test I suggest is to get the engine to normal running temperature,stop the engine (remove the Ign Keys) feel the radiator top tank (Be careful it will be hot) than put your hand on the bottom tank. Both top and Bottom tanks should be the same tempter,if not means your Radiator is blocked.Hope this helps. waltz.

Answer 5

Sounds like a bad water pump. You should not have to put water in your car in less it is leaking or burning coolant. I hope you don't live in a part of the world were it freezes if you do you need antifreeze right a way a 50/50 mix. You could all so just remove the thermostat all together it will take longer to get heat in the winter but no harm will be done good luck

Answer 6

if its leaking you should be able to find where its coming from and replace that part. if its not leaking i think the radiator is either plugged on the inside and may need flushing or replacing. some places can flush it out with an acid to clear out the corrosion. it could be plugged on the outside too. the aluminum fins need to be free of debris so air can pass through and cool down the coolant. try checking the radiator cap. it has a spring on the bottom that compresses when pressure gets high in the cooling system and bleeds it off into the overflow tank. they're cheap just replace it with one specified for your car. if all that fails, take it somewhere and have them diagnose it. it sounds like it is deffinately leaking if you had to add some though. it could be coming out of the overflow tank when it overheats though too.

Answer 7

As maximum individuals have suggested, that's the A/C. the warmth is extremely hassle-free to make with the aid of fact the engine will become extremely heat interior of a jiffy of beginning the motor vehicle. in actuality maximum engines have an intricate sequence of followers, radiators, and fluid crammed pipes to maintain the engine from overheating. So only taking a number of that warmth that already exists and blowing it into the cabin isn't any super deal in any respect. The air con is yet another tale nonetheless. The A/C takes an significant quantity of electric powered to run what's in actuality a small refrigeration unit. In turn greater capability is taken to interchange the electrical powered that has been used, and that in the time of turn leads to a decrease gas intake. yet on the tip of the day the adaptation is infrequently significant. some human beings prefer to open living house windows, thinking they're saving on gas. however the fact is that by taking off the living house windows they're critically increasing the drag of the motor vehicle, that expenditures gas. in case you in no way switched on the fan, the A/C, the radio, or operated any digital gadget contained in the motor vehicle different than easily the necessities, you will possibly shop on gas. might that saving be significant? no longer incredibly. might that's incredibly actually worth the sacrifice in convenience? extraordinarily much in no way.

Answer 8

Water pump? Restricted radiator? Hmmmm.

Answer 9

could be timed too high. stopped up radiator?

Answer 10

check the ignition timing! JD.