My car keeps running hot.


Asked by Oct 02, 2014 at 08:18 PM about the 2001 Mazda Millenia 4 Dr Premium Sedan

Question type: Maintenance & Repair

My car keeps running hot and is building up pressure on the radiator hose. I tried changing the thermostat, that didn't work. I then had the radiator fix/repaired, the car ran good for a couple of weeks. Then today on my way home while in traffic it ran hot again. I don't know what else it could be. I have already put $540 into this problem. I need some suggestions please.

12 Answers


Have you checked the radiator fan,s and made sure they are running?

1 out of 1 people think this is helpful.

If it builds pressure quickly, then you could have a head or head gasket problem.

1 out of 1 people think this is helpful.

I had some one check the fans, both of them and I was told they were working. I even changed out the fuses to make sure. But as far as I know they may not be working while im driving and the car is over heating.


it wouldn't be the first time I was told it could be a head gasket problem, but my oil isn't a milky color or has water in it.


I think it is ,fan,s or water pump.

1 out of 1 people think this is helpful.

okay thanks man, but one more thing. I know there's pressure building up on the hose and also if I start the car with the radiator cap off you can see little bubbles coming up and forming. Like air bubbles almost maybe. Any idea what could be my problem?


Have a compression test done. That's the best option to find out if the head gasket is the problem.

2 out of 2 people think this is helpful.

That sounds like the early stages of a head gasket failure. Have a block check performed that will tell you for sure

2 out of 2 people think this is helpful.

Agree with both fellas, above all so,but when you see the bubble,s do you see the water circulating?

1 out of 1 people think this is helpful.

okay thank you guys..


no I don't see anything circulating

1 out of 1 people think this is helpful.

Water pump,bad,then check for damage to gasket like BM,And TS,said to see if it hurt the gasket,s.

1 out of 1 people think this is helpful.
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