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Overheating Okay, so i'm facing a really weird issue with my 2003 Magna. When I start it in the morning everything is fine and it runs perfectly despite a little vibration which is most likely to be a engine mount issue.. Anyway, when I stop at a red light for more than a minute, the temperature gauge starts rising up. And when I turn on my AC, it slowly goes down... So when the AC fan starts turning the temperature goes down. Keep in mind that I don't have a problem with the main car fan.. All help will be highly appreciated!

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Could be a number of things,
Do you have heat from the heaters?
Do you have any coolant loss?
If so i'd get a Cylinder leakage test done (compression test) as it could be a head gasket problem.

Posted on Jan 11, 2013


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Posted on Jan 02, 2017

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SOURCE: Overheating and heater not work

there is a valve on the water pump and one on the thermostat housing open those up one at a time until you get a little bit of antifreeze come out then tighten them back up. All you will be doing is bleeding the air out of the cooling system. my car was doing the same thing after I changed my thermostat.

Posted on Dec 12, 2008

  • 2984 Answers

SOURCE: 2004 f-150 5.4L temp. rising at speeds over 65mph

Not a mystery....just sounds like your temp sensor on the block may be bad.

Easy way to be sure, go to an auto parts store when you do get the check engine light and have it read and see what the code is. If they can't tell you what the code number means, come back here and post.

Posted on Apr 02, 2009

  • 29 Answers

SOURCE: Car Overheats after 12 to 15 minutes of running. Temperature decreaes when I accelerate.

your fan is the's not turning fast enough to cool the engine off. I need more info on what type of fan you have....elec fan or a clutch fan?

Posted on Apr 24, 2009

  • 784 Answers

SOURCE: Fiat Car Overheating

1- Open the oil cap, if you see the milky stuff inside the cap then the engine is having a head gasket problem since water is mixing with the oil thru head gasket. You need this fixed ASAP.
2- If there is no milky stuff, you are still lucky.
3- Now you need to check if you have a thermostate or/ and radiator clogged up problem.
4- Take off the thermostate.
5- Reconnect the upper hose.
6- Run the engine
7 Squeeze the upper hose to feel water flowing inside.
8- If there is water flowing, the problem with the thermostate. Put in the new therostate. It will solve your problem.
9- If there is no feeling of water flowing then you have a problem with the water pump or the radiator clogged up.
10- To check if the water pump is working or not. Wait for the engine cool down.
11- Disconnect the upper hose from the radiator.
12- Turn on the engine and continue feeding water thru the radiator cap.
13- If water was pumped out at constant flow, your water pump is good. Change the radiator since it gets clogged up. This is your problem.
14- If water is not pumped out, the problem is the water pump. Change the water pump since this is the culprit.
Since the troubleshooting is involved intensive labor, most shops are just replacing part at your customer expense by replacing one after another. To be ahead of them, you troubleshoot the problem then tell them to change the correct part. Good luck .

Posted on Jul 25, 2009

  • 99 Answers

SOURCE: Engine Coolant Temperature Light came on

whats happening is your a/c is putting an extra load on the engine. it happens with any car. that generates extra heat. it is possible that you need your coolant topped off, but chances are that your car would have overheated before if that were the case. what i would recommend is to first check to see if the coolant level is good. if it is, then get the car up to operating temperature and check to see if the cooling fans on your radiator are working. if not, it may be a bad fan, or just a fuse or relay. if that doesnt solve your problem, have the thermostat changed out for a new one. theyre pretty inexpensive. second, if you or someone you know has the know-how, remove the radiator, plug the fittings for the transmission cooler if it has any, and use a power washer to clean the radiator out. sometimes dirt can accumilate there over time and it wont let the heat dissipate properly. a coolant flush wont be bad for your car, but probably wont make your problem go away.

Posted on Aug 03, 2009

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