weird overheating

[roger75]

hey everyone i have a nissan 240sx which i recently changed the water pump and the thermostat...the weird thing is that when i accelerate the needle goes down to cold but the more i stop the more the needle goes to hot and it gets to the point to where it starts throwing steam out the overflow tank...anyone know what it can be?

[xX RB Xx]

did you make sure everything was plug back up correctly?? and did you put coolant back in?

[driftneil]

Air in the system

[janda240sx]

Last one I had that done that; it wound up being a blown headgasket.

[blacksrjdm]

Head gasket or clutch fan.

[driftneil]

Wouldnt the h.g. make it overheat?

[blacksrjdm]

Wouldnt the h.g. make it overheat?

Steam comming out of the overflow tank...nah thats not overheating, thats just steam.......Huh???

A h.g. would make it over heat and that is exactly what is happening. Thanks though.

[blacksrjdm]

hey everyone i have a nissan 240sx which i recently changed the water pump and the thermostat...the weird thing is that when i accelerate the needle goes down to cold but the more i stop the more the needle goes to hot and it gets to the point to where it starts throwing steam out the overflow tank...anyone know what it can be?

The real question is why did you replace the water pump and thermostat? What was the symptom that made you replace those parts? We'll start there, that way we can see if the water pump and thermostat helped anything.

[driftneil]

Steam comming out of the overflow tank...nah thats not overheating, thats just steam.......Huh???

A h.g. would make it over heat and that is exactly what is happening. Thanks though.

Is there a need to be a d!ck? Didnt see the steam thing, my bad. Im having a similar problem, but when I start the car with the rad cap off, it pushes fluid out the rad. Also looks like it leaks from the water pump, so figured we had the same prob. Any suggestions?

[3cpeeo]

Is there a need to be a d!ck? Didnt see the steam thing, my bad. Im having a similar problem, but when I start the car with the rad cap off, it pushes fluid out the rad. Also looks like it leaks from the water pump, so figured we had the same prob. Any suggestions?

try this:

with the car cold, open the radiator cap and start the car. if it is pushing out the coolant out of the radiator, that is a blown head gasket. thats your exhaust stroke of your motor leaking out your radiator.

if it doesnt do that while its cold, the thermostat either got stuck closed already, or you need to bleed it. bleeding a system may take up to an hour, no joke.

good luck!

you can also test your thermostat by putting it in a pot of boiling water.

[driftneil]

And It wouldn't be anything else, like a clogged rad or something. I've used that radiator stop leak recently, would this do it?

[Salem240]

Is it possible the thermostat is stuck open.