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  #11  
Old 02-08-2014, 04:27 PM
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Thanks very much for this DIY. I was having trouble pulling the coolant temp sensor connector off, as I was pulling on it, rather than pushing, as was pointed out in this DIY.
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  #12  
Old 04-18-2014, 01:17 PM
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Tried doing this today. Lower end is also baked on. Took the pan off, pried like all hell, and still couldn't get it off. Having a buddy come by and help later.
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  #13  
Old 04-18-2014, 04:45 PM
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Quote:
Originally Posted by ProfessorX5 View Post
Tried doing this today. Lower end is also baked on. Took the pan off, pried like all hell, and still couldn't get it off. Having a buddy come by and help later.
Try to use the heat gun or hair dryer and heat up the connector to the radiator. This will make the o-ring softer an you should remove it easily. I heated my up to about 200 degree F bottom first then top. I did all my hoses last weekend when doing valley pan, valve covers, CCV, etc. Be patient and carefully with Radiator Connector as you could break it and will cost $$ to replace with radiator.
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  #14  
Old 04-19-2014, 01:43 PM
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Cool idea, bt carefully applied brute force won out. Now, however, I think I should have bought a new temp sensor as I might be leaking from there... are BMWs engineered to keep you from re-using old parts that are still working? :P
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  #15  
Old 04-21-2014, 08:38 AM
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Now those are going to be a set of dirty nails!
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  #16  
Old 04-21-2014, 09:19 AM
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Originally Posted by ProfessorX5 View Post
Cool idea, bt carefully applied brute force won out. Now, however, I think I should have bought a new temp sensor as I might be leaking from there... are BMWs engineered to keep you from re-using old parts that are still working? :P
BMW are engineered to keep people from fixing their own cars. Why do you think they have coding for replacement parts?
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  #17  
Old 04-21-2014, 10:27 AM
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LOL... ah well at least a new sensor isn't expensive.
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  #18  
Old 04-21-2014, 11:31 AM
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Originally Posted by ProfessorX5 View Post
LOL... ah well at least a new sensor isn't expensive.
A new O-ring should actually do it. You need to know the dimensions for it. The OEM O-ring is green, and will shrink in time. There are aftermarket O-rings (black in color) made out of Viton I believe, and these will NOT leak even after years of use. The "Fanatics" have put together a post with interchangeable parts (you have to search for it - the title I believe has the words "BMW interchangeable parts" in it), and also the "Festers" have this O-ring issue documented, but again you have to search. For this one it's a thread by "Bluebee" I believe and you have to search "coolant sensor" or similar.
No need to buy a new sensor if it's working OK. Just use some 2000 grit sandpaper maybe and clean the brass element from deposits, if any.
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  #19  
Old 09-17-2018, 02:22 AM
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- 2004 X5 2.5i with 84K miles...

- Both Upper and Lower Rad Hoses look fine, zero leaks, but I want to be proactive...

- Does anyone have any recommendation of when (years/mileage) to replace the hoses?

- If anyone has had a burst hose: when did it happen?
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  #20  
Old 09-17-2018, 08:08 AM
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I think most of the time it is only the sensor o-ring that is leaking. Both of mine where leaking when I bought the vehicles at about 190k. Both vehicles had water pumps and thermostats replaced because they overheated before they where sold to me and neither shop noticed/fixed the leaky coolant sensor!
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