Massive Coolant leak-2001 540i - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 06-01-2010, 11:35 AM
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Massive Coolant leak-2001 540i

Yesterday I was passing someone and got the engine revs way up while doing so. After coming to a stop light I noticed steam and smelled coolant. I went to accelerate and the traction control came on as I drove away! After that everything seemed fine and I went home so I thought maybe coolant went through an overflow of some kind?

The next day I drove it and it steamed again and the temp went to redline, then back down again, then redline, etc. It then stayed at redline and I pulled over. Eventually limped home and about 6 blocks from home I drove it on redline (I know-stupid to do)!

The leak appears to be coming from near the transmission fluid lines, underneath the car towards the drivers side. Any ideas what I am up against here? Thanks for any help you can give.
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#2 (permalink) Old 06-01-2010, 11:45 AM
OMFG another one!?
 
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That could be a leak associated with the heater core.

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#3 (permalink) Old 06-01-2010, 11:47 AM
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Thanks

I was thinking the same thing. There is the hose that runs right through there to the heater core I think?
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#4 (permalink) Old 06-01-2010, 12:38 PM
OMFG another one!?
 
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Have a look at realoem.com

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#5 (permalink) Old 06-01-2010, 12:49 PM
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Thanks

I'll give that site a look. I just hope I didn't fry the engine!
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#6 (permalink) Old 06-02-2010, 03:19 AM
Help from over the pond
 
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I would be looking more at the radiator where the trans line connect to....

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#7 (permalink) Old 06-02-2010, 09:27 AM
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Radiator

There does appear to be some dried up coolant in that area. But when I popped the hood during the overheat, it did appear that most of the steam was coming from the area of the firewall, in front of the drivers side. But when I looked in there yesterday, I did not see any obvious sign of a problem there at all. Not sure what the heck is going on but at this point I'm bringing it in. If it was something I could see, then fine, I can probably handle it. But I can't find anything that sticks out as being the problem. Sucks!
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