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Radiator overflow leak

This is a discussion on Radiator overflow leak within the Tech Info forums, part of the 3rd Gen : 2002 - 2008 category!
Hey guys, for a while now my overflow box has been slowly going down. I cannot find a leak and ...

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Old 03-06-2012, 11:40 AM   #1 (permalink)
 
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Default Radiator overflow leak
Hey guys, for a while now my overflow box has been slowly going down. I cannot find a leak and neither can my mechanic. 03 4.7L. Jus wondering if anyone has had or heard of anything like this happening before. Or if there are things I can check. The oil is fine. Had it change and have checked it. Other then that I don't know what to look for.


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Old 03-06-2012, 11:56 AM   #2 (permalink)
 
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How slowly are we talking? Do you ever see any kind indication of a leak like a small almost dry spot on the driveway or anything? Mine did this for quite a while until it gradually got worse, and it was the water pump slowly leaking. At first it was so slow that any spot on the driveway was drying up before I could spot it. But eventually it got to the point where I could see a small trickle from the water pump itself.


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Old 03-06-2012, 12:01 PM   #3 (permalink)
 
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My overflow tank itselft will weep at the seam.


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Old 03-06-2012, 12:12 PM   #4 (permalink)
 
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Really slow leak. Still have yet to ever see a wet spot on the driveway. Don't really have to fill it up too often.


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Old 03-06-2012, 12:14 PM   #5 (permalink)
 
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ive had my radiator replaced twice because i noticed at the very bottom on the driver side there was a very small leak, thank god for warranties and i replaced the overflow bottle and cap because i thought it was that but i was wrong but i guess now i dont have to worry about it anymore. hope you find your leak. i would look at the bottom driver side because thats where mine has been the last 2 times.


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Old 03-06-2012, 12:17 PM   #6 (permalink)
 
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Pop the hood and check the top seam on the tank to see if its even alill shiny. Mine will lose just alill (less then a cup) over about a 3-4 month time.


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Old 03-06-2012, 12:17 PM   #7 (permalink)
 
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Do a pressure test. Also you might be burning it.


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Old 03-06-2012, 12:18 PM   #8 (permalink)
 
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Ghost yeah there were a few bad batches of rads that went out. Mine split on the side one day after I got to work thankfuly.


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Old 03-06-2012, 06:59 PM   #9 (permalink)
 
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I will check under the driver side and also the top of the tank and get back to you guys..

Thanks


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Old 04-03-2012, 03:01 AM   #10 (permalink)
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Mine had a very small crack at the top corner of the drivers side. The plastic caps are known to leak. A new radiator is only $100 or so.
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