Question about 2003 Honda Civic

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Changed anti freeze and now car runs hot and no heat

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Did u empty water if so u most proberly got a air lock. try taking cap off tuning heaters full on start engine and let run and top up as necesairy

Posted on Oct 04, 2009

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Air lock. You'll have to loosen a heater hose or something, and run it with the rad cap off till the antifreeze goes into the system.

Posted on Oct 04, 2009


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Heater blows some warm till I turn the fan on then it gets cold

put a radiator flush in the expansion bottle run for about 20 miles .that will clean the core of your radiator .and the core of your heating of rust and should change your thermostat .after draining it. then refill with 50/50 mix of anti freeze.then put your heating on full .to bleed them both. run the engine on tick over.till water is getting hot .then refit the cap.

Dec 16, 2013 | 1999 Dodge Durango

1 Answer

I have a 2003 Chevrolet Malibu and for some reason it keeps running hot due to air in the line for the coolant. We can add water or anti-freeze and it will overflow out. We have changed the thermostat, and...

maybe there is a crack in the hose and air is getting in and heats up the water and anti freeze you should buy a new radiator hose that should fix the problem

Sep 01, 2011 | 2003 Chevrolet Malibu

1 Answer

Car is running hot had a recent radiator change, the top and bottom hoses are very hard and hot ! could this be the thermostat stuck closed?

Check your coolant level. It may be low.
Did they put the proper mixture of anti-freeze back in? I would have the anti-freeze checked. Or you can buy a simple little tool for a few bucks and do it yourself.

A radiator hose is supposed to be "hard" to withstand the heat. If hoses become soft it is time to replace them.

I don't know enough about Mercedes to answer your question much further other than to suggest the thermostat. If they put in a new radiator, they should have suggested putting in a new thermostat also, but they don't always do that.

Check your anti-freeze mixture first.

Simple things first.

Feb 14, 2011 | 1998 Mercedes-Benz M-Class

1 Answer

I have the old green anti-freeze in my vehicle , the main heater hose is getting warm but no heat, does the anti-freeze matter ?

NO, but thats the incorrect anti-freeze. It should be ORANGE Dexcool. Both hoses in and out should be HOT. if they are not, flush the heater core.

Dec 08, 2010 | 2001 Chevrolet Blazer

2 Answers

Car idols rough and has started over heating had auto zone pull codes and they said it is the fan. needles to say we replaced that and the problem did go away. had a/c relay switch replaces 4 months ago....

a/c relay has to do with a/c compressor. Do you have a/c? If so it's not that. You could have a bad thermostat. Have you replaced one yet? That would cause the over heating. The rough idel I'm not sure what to tell you there. Sorry.

Aug 12, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

My heat doesn't work in my 1993 toyota corolla

Could be vapor lock, or air lock/bubble. First make sure the coolant is topped off, never do this when the car is hot! Take off the radiator cap and poor in anti-freeze, replace cap, now start the vehicle COLD remove cap and pour in more anti freeze if needed. When the engine runs it will **** anti-freeze(coolant) and therefore you may need to pour in a little more. Now wait until the car is hot and check for heat. If you have ever heard a gargling sound or bubbling when you turn your car off, this is a sign of low coolant and or air lock. If you still do not have heat, make sure your coolant lines by the engine are connected as well as any electrical wires going to your temp control valve located between your coolant hoses where coolant runs through it. If you still do not have heat, your water pump may be failing, how ever if your engine does not overheat, then do not replace it. Lastly there is a control valve that opens and closes a flap door to allow/block heat. If this controller failed then you will need to have it replaced.

Dec 09, 2009 | 1993 Toyota Corolla

4 Answers

95 vw jetta over heating

i changed my head gasket and still over heats i need options. also it looses anti freeze and it goes to the exhaust.

Mar 02, 2009 | 1996 Volkswagen Jetta

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