antifreeze boils over

[lwes]

Hey, when I drive my car for a bit it will start to idle high when it gets hot. The temperature guage reads normal at medium. Sometimes I can kick it down from idling high. But my antifreeze still boils over. I tried spraying the throttle with wd40, but now I'm thinking that it has to be something else. Has anyone had the same problem, can you please help me.

[mazdasly75]

First? what's engine you are running? 1.8 or 2.5 and what millage?<p>it may be a misfonction of the thermostat. It could be also, a damaged impaler's water pump.<p>Need more information of your setup

[mazdasly75]

Oh, and the temperature readout sucks. Don't look at it anymore.

[killerpickle]

I would check your upper rad hose and other rad hoses for leaks or signs of leakage. A leak in your upper rad hose can cause your temp gauge to shoot up and down, and also can empty your overflow. I fixed mine a few months ago, this was the problem. I can't say I saw boil over though. That could be your head gasket pressurizing the coolant system....

[lwes]

I have a 1.8l v6 with 150 000k. I will take a look for a leak in the hose. A few months ago I got my thermostat replaced so i don't think its that unless it isn't working properly. thanx