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cars overheating, very weird HELP!

 
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Old 10-26-2010, 11:07 PM
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cars overheating, very weird HELP!

Okay so this is ridiculous. I got a 4th generation with the h23. During the daytime the car does not over heat what so ever. Its always where it should be. But at night the car over heats constantly. When im in gear and driving everything's fine but when im sitting at a red light in neutral for a few minutes it heats up. It seems like it only over heats in neutral. I honestly do not know if its actually overheating, it might just be the Gage, I have no clue. Tonight it was raining and when i parked it i noticed that there was steam coming off the hood. Not good. I don't wanna blow my motor, just blew my tranny and i just replaced that, so i don't wanna replace the motor so i need some advice. Its either A. my thermostat B. my radiator or C. my water pump? Btw i live in Pittsburgh so i don't know if the weather changes matter at all.
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Old 10-27-2010, 12:36 AM
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Re: cars overheating, very weird HELP!

1 check your coolent (obvious but still it never hurts)
2 do your fans come on?
3 do your rad hoses have pressure when the thermostat should open?
if you answered
1 full and good condition
2 yes
3 yes
than its your gauge or the temp sensor
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Old 10-27-2010, 11:03 PM
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Re: cars overheating, very weird HELP!

That would make sense cause the rad hose is really starting to get bigger. Its still weird that it only overheats at night though
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Old 10-28-2010, 08:05 AM
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Re: cars overheating, very weird HELP!

I'm gonna say it's a fan not working. The reason they usually heat up when you're stopped is because you don't have the airflow cooling your radiator as you drive. The fan provides the only air flow when you are stopped.

To check your thermostat quickly, feel the upper and lower radiator hoses after it warms up. If (I think the bottom) is hot and the top (I think) is cold then your thermostat is not opening up.

Also, watch your temp gauge. When you start the car it should be dead cold, and it'll stay that way for awhile. Then pretty quickly it should rise to operating temperature. The reason it jumps up like this is because the temp gauge or whatever is located past your thermostat, so when the car is heating up and the thermostat is closed, it just reads cold. Then the thermostat opens when it gets hot enough to let coolant go through the radiator and the temp gauge goes from 0 to about half way in maybe a minute. The quick rising from cold to normal, or the "jump" in temperature, is your thermostat.

I kinda doubt it is the thermostat. I'm still thinking a fan. Could possibly be the water pump too.
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Old 10-31-2010, 02:06 AM
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Re: cars overheating, very weird HELP!

My thermostat constantly gets stuck, the engine heats up, then it goes back to normal and starts heating up again. It also sucks up all of the coolant, changing the thermostat would be a good idea.
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Old 10-31-2010, 05:05 AM
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Re: cars overheating, very weird HELP!

Quote:
Originally Posted by ranger11x View Post
1 check your coolent (obvious but still it never hurts)
2 do your fans come on?
3 do your rad hoses have pressure when the thermostat should open?
if you answered
1 full and good condition
2 yes
3 yes
than its your gauge or the temp sensor

+1 check all this before you do anything else. After that tell us the problems to the point and we can help find out.
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Old 10-31-2010, 11:15 AM
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Re: cars overheating, very weird HELP!

are you using the ac during the day ?? if so this will trigger a fan on as soon as you put on the ac .. just a thought . if your using the ac and it stays down but dosnt when its not you have a fan issue ....
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Old 10-31-2010, 11:31 AM
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Re: cars overheating, very weird HELP!

if its none of the above problems check your radiator for circulation if there is none your rad. could be getting cloged you can take to a rad. shop were they will rod it out for you
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Old 01-22-2011, 08:33 PM
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Re: cars overheating, very weird HELP!

my 88 prelude is overheating, i have replaced the thermostat with a fail safe that locks open at 165 degrees...just got done replacing the water pump and timing belt.. replaced upper and lower radiator hose...coolant levels keep dropping, no coolant in the oil or vice versa.. anyone come across this problem before...and cooling fan is working... if you start the car without radiator cap on coolant gets blown out of radiator... i am at a loss.........any help is appreciated ( hard when it is an only vehicle) ....
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