Question about 2003 Ford Focus

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Where is the radiator cap on 2003 Ford Focus ZTW

I am leaking antifreeze from somwhere on my Ford Focus ZTW. I went to put stop leak in the Radiator, but couldn't find the radiator cap. I know where the radiator is, but there doesn't appear to be a cap easily accesible. Any ideas?

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I do not believe that there is a radiator cap on the Focus. I believe that the coolant is filled from the what most would consider the overflow tank. It is an overflow tank of sorts but serves also to fill the radiator.

Posted on Dec 31, 2008

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put it in resovour if theres no cap

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The radiator was emptied out and i want to add antifreeze and water? there are 2 areas that say antifreeze goes here?


  • One is the radiator and the other is an overflow tank. Sometimes anti freeze will back pressure a bit and need somewhere to go and other times the antifreeze gets low in the radiator. That is the purpose of the radiator.
  • Put the antifreeze in the radiator fist and then add to the reservoir. Pay attention to the cold/hot level fill on the overfill tank.
  • You need to find out where all that antifreeze went to if the radiator was empth. Pull the dipstick and look for a chocolate milk look on the oil. This would be a head gasket or a cracked head.
  • Otherwise keep an eye out for a leak and repair it soon.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

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I need to put a stop leak in my radiator but cant find the radiator cap


go to a automotive store and buy a replacement as well you can get stop leak for rad there too...

Mar 18, 2011 | 2001 Ford Focus

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Antifreeze is leaking from around my radiator cap on my 2003 chevy impala and I think it is the cause for my car overheating but my radiator cap is not hot, What could be wrong?


try to replace a new rad. cap-if still leaking & original radiator-then the tanks are wearing down,try putting some stop leak in it momentary-radiator may need to be replaced-not that big of job,you can do yourself-shops will charge $$$$$ hope that helps-good luck!

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2003 saturn ion adding antifreeze every 2 weeks cannot find leak


There should be a radiator cap as it controls what goes into the overfill tank. You might consider replacing it. If there are no leaks in the radiator or hoses, there are only 3 places the coolant can go (water pump leak, blown gasket, or out throught the radiator cap). Hope its the cap because that's the cheapest. Good luck!

Mar 10, 2010 | 2003 Saturn ION

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Is there a cap on the radiator to fill with antifreeze? I would like to add some leak repair and want to put it directly into the radiator, not the expansion tank.


No, there is no direct access to the radiator. You can only put fluid in the reservoir. And I agree with Ziggyone, the coolant repair will clog the heater core and probably the radiator.

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I have had car put under pressure to check for


You could just be burning it up. Do you have accesive white smoky exhaust?
Have you filled radiator completely. Fill completely once while vehicle is running, burp upper radiator hose while adding. Then wait 10 minutes and the coolant level should drop in radiator as it will flow into engine block. This is where you want to fill the system again, and put the cap on.

Sep 09, 2009 | 2003 Ford Expedition

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Where is 2003 Ford Focus ZTW radiator cap?


If your resevoir cap is a screw on cap it is probably the only cap you have most cars nowadays pressurize the resevoir and this is where you add coolant and dont have a rad cap

Dec 31, 2008 | 2003 Ford Focus

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It's on top of the radiator. Don't add stop leak to the reservoir, it will only create other problems.

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