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X5 E70 (2007 - 2013)
E70 BMW X5 produced between 2007 and 2013. Discuss the E70 X5 with other BMW owners here.

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  #1  
Old 02-21-2014, 07:03 PM
alecela alecela is offline
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The radiator from HELL!

Hi all,



Here's my sober story:



Owned my 2008 X5 3.0Si for little over 3yrs now and with about 55k km driven and I'm just about to put in a new radiator for the FOURTH TIME!



Yes I'm having an indy doing the work but he always gives me back the replaced parts and the packaging so I can see that I've been using OEM parts.



So my question: is there something else causing the regular failure on the radiator? My family have owned various BMW's for decades so I'm a little shocked to see unreliability like this.



Any help/pointer appreciated. Tx.

Last edited by alecela; 02-21-2014 at 08:44 PM.
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  #2  
Old 02-21-2014, 07:10 PM
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serge1 serge1 is offline
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How exactly does the ratiator fail? Leak?
How often? What are the symptoms?
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  #3  
Old 02-21-2014, 08:34 PM
alecela alecela is offline
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The radiator from HELL!

Yes they all started w/ leaks. I can't remember all the dates but fair to say the replacements lasted less than one year on average.

Last edited by alecela; 02-21-2014 at 08:41 PM.
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  #4  
Old 02-21-2014, 09:19 PM
ard ard is offline
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Not sure about HK, but in the US the replaceent radiator has a 2 year warranty...your 2, 3 and 4th radiators would have been free!
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  #5  
Old 02-22-2014, 01:40 AM
alecela alecela is offline
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Yes indeed the 2nd one & the coming ones are covered under warranty as the 1st one & 3rd one lasted only a few months!!!

So what gives?


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  #6  
Old 02-22-2014, 02:18 AM
CitizenOfDreams CitizenOfDreams is offline
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Did they all leak in the same place? Maybe the radiator is stressed mechanically because of a bent mounting part or installation error?
Does the cooling system have excessive pressure? Too much coolant, head gasket leak?
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  #7  
Old 02-22-2014, 06:35 AM
tony(topaz,SMG) tony(topaz,SMG) is offline
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I would replace the expansion tank cap at the same time. The cap is a sort of pressure release valve, so if it has failed, it might be allowing the pressure to get too high. As a practical not, I have always replaced the entire cooling system on my BMWs every 70K miles or so. That includes the radiator, expansion tank, water pump, and thermostat. It seems that all of those components tend to fail one after another, and you will have peace of mid for the next 70K miles.
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  #8  
Old 02-22-2014, 10:17 AM
ard ard is offline
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Maybe find a new Indy....
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  #9  
Old 02-22-2014, 11:24 AM
Rahulk Rahulk is offline
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Make sure he is using bmw fluid with distilled fluid... If you use water from a hose it will kill the radiator... Also make sure he doesn't use any air tools when fighting down the bolts, that will crack the radiator for sure! Before he returns the car to you make him do a 2 hour pressure test on the system... It should not leak at all... If it does.. Something's wrong... Clearly an installation error... Either installed wrong or something else not installed incorrectly is stressing it...


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  #10  
Old 02-24-2014, 08:10 AM
alecela alecela is offline
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Well, the following parts related to radiator/cooling system has also been replaced:

coolant pump
coolant tank/reservoir
numerous radiator
hoses for radiator

As you can see, I do like to maintain my car in top condition but this radiator failures is definitely beyond my tolerances!!!
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  #11  
Old 02-24-2014, 09:58 PM
ard ard is offline
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Quote:
Originally Posted by alecela View Post
Well, the following parts related to radiator/cooling system has also been replaced:

coolant pump
coolant tank/reservoir
numerous radiator
hoses for radiator

As you can see, I do like to maintain my car in top condition but this radiator failures is definitely beyond my tolerances!!!
55k kms is 33k miles.

Replacing that many parts is NOT 'maintaining your car in top condition'..it is being screwed by your mechanic.

IMO
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  #12  
Old 09-24-2014, 09:45 AM
alecela alecela is offline
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Well guess what? I replaced the radiator then (in Feb this year) and it started leaking again two days ago. Again, it lasted less than 1yr!!!! My mechanic actually asked me to take the car back to BMW dealer and see what the problem is. The real problem is that the bloody dealer here runs SUCH a great franchise here that they cannot take in the car for another week or so. So I'm turning to my fellow net wisdom here. Any clue?
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  #13  
Old 09-24-2014, 10:01 AM
henrycyao henrycyao is offline
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Do you have a photo of previous leak? I assumed you examined the replaced unit.


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  #14  
Old 09-25-2014, 08:14 PM
alecela alecela is offline
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I visually inspected the failed radiator but didn't notice much. My mechanic performed pressure test on them and noticed almost all of them were suffering leak toward the edge near the coolant intake pipe.
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  #15  
Old 09-25-2014, 08:25 PM
alecela alecela is offline
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Quote:
Originally Posted by tony(topaz,SMG) View Post
I would replace the expansion tank cap at the same time. The cap is a sort of pressure release valve, so if it has failed, it might be allowing the pressure to get too high. As a practical not, I have always replaced the entire cooling system on my BMWs every 70K miles or so. That includes the radiator, expansion tank, water pump, and thermostat. It seems that all of those components tend to fail one after another, and you will have peace of mid for the next 70K miles.
When you say expansion tank, are you referring to the tank/reservour that holds the coolant? If so, that has already been repalced once already...
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  #16  
Old 09-26-2014, 04:15 AM
tony(topaz,SMG) tony(topaz,SMG) is offline
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Quote:
Originally Posted by alecela View Post
When you say expansion tank, are you referring to the tank/reservour that holds the coolant? If so, that has already been repalced once already...
Yes, the cap to the reservoir. Don't reuse the same cap. It might be allowing the pressure to get too high.
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  #17  
Old 09-26-2014, 09:49 AM
alecela alecela is offline
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Ok, let me try it this time. Thanks again for the advice. Let's hope for better luck this time!
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  #18  
Old 09-28-2014, 08:55 PM
yeswecan yeswecan is offline
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Well, I used to own 323i before I got the X5, the 323i got a radiator problem too, I keep changing the new radiator but the radiator will fail after around 5 months, turns out don't order cheap local parts or Ebay parts, they are cheap but made with hell, just pay and get a BMW radiator, it is expensive than local parts but trust me it will last for long
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