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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 11-16-2012, 01:45 PM
Mr.750 Mr.750 is offline
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Thumbs down dripping anti-freeze

My 06 750I is leaking anti-freeze like a cow that hasn't been milked all day! I have no idea where it is coming from, as when I look under the hood all the hoses I can see are fine, and I have no idea what else it could be. Everytime after driving(15 miles or so) I have a puddle of anti-freeze thats big enough for a family of goldfish to survive in. Any ideas?
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  #2  
Old 11-16-2012, 01:58 PM
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1bad540 1bad540 is offline
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check the lower rad hose the sensor o ring usually goes.
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Old 11-16-2012, 02:06 PM
Mr.750 Mr.750 is offline
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Location: Mt. Auburn, IA
 
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Quote:
Originally Posted by 1bad540 View Post
check the lower rad hose the sensor o ring usually goes.
Where are they located? will I have to take covers off?
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  #4  
Old 11-16-2012, 02:12 PM
SFbay SFbay is offline
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Could be a wheep hole as well
Or hoses, waterpump, expansion tank
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  #5  
Old 11-16-2012, 02:32 PM
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1bad540 1bad540 is offline
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Mein Auto: E65 750i Sport,C5 z51 e46
underneath the car.
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e39 540i sport, acs type 2's chrome, acs spler pdls,Euroclrs
e65 745i aw sport,21's aib's acspedals& rf splr(sold)
e46 328i Prem Aw18" 335spt whls(sold)
c5 Corvette 6sp,z51,2"drp,19"ccw'sshrt shft,corsa exh,dd nav
e53 X5 3.0, pana rf,nav,xenon,cldweather, premium.ipod hookup, 20"4.6rims staggered 315rrs.
e65 750I aw, sport. chrome21's,acs pdls,acs rfsplr,mtecs,8k hid fogs,Leds.oem ipod&sirius
Srt10 VIPER, 19-20" rennen forgedwheels,tune,exhaust,intake.
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  #6  
Old 11-16-2012, 02:56 PM
allaboutthelife allaboutthelife is offline
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I had the same issue, mines was the O ring sensor on the lower rad hose like @1bad540 stated. The part cost me $43 and installation $70! I love this forum.
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Old 11-16-2012, 02:57 PM
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First_745Li First_745Li is online now
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Quote:
Originally Posted by BMW750IMMIA View Post
My 06 750I is leaking anti-freeze like a cow that hasn't been milked all day! I have no idea where it is coming from, as when I look under the hood all the hoses I can see are fine, and I have no idea what else it could be. Everytime after driving(15 miles or so) I have a puddle of anti-freeze thats big enough for a family of goldfish to survive in. Any ideas?
Sorry to hear that...check this link out

http://www.bimmerfest.com/forums/sho...d.php?t=651616
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Old 11-16-2012, 04:50 PM
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Also remove the 6 bolts on the engine cover an right in front of the throttle body is a 3 prong plugs. Make sure its not leaking.
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Old 11-16-2012, 07:51 PM
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I didn't have a leak but just replaced the o-ring when I flushed the coolant as a preventative method. It costs $3 at HomeDepot.
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  #10  
Old 11-16-2012, 09:16 PM
Mr.750 Mr.750 is offline
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Thank you for all that helped! Of course, you were right. However you figured out it was that exact part out of the 228,836 in this car, I give you props.
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