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Coolant puddle found

Discussion in 'E34 (1989-1995)' started by slinky66, Oct 8, 2010.

    slinky66 guest

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    I smelled coolant last night when I was going through the drive-in ATM so I quickly pulled over, while engine was running, opened the hood and did not see any wet coolant or leaks near the hoses or at the base of the radiator. When I got home however, I noticed a small trail of coolant on the driveway. From the position of the spill, it looks like it was dripping right under the drivers side front seat. I looked underneath and sure enough, the car was wet with coolant at about that location. I will investigate further, after work today when I have the proper light and tools but can anyone speculate on where the leak might be originating? 1995 525i

    http://www.realoem.com/bmw/showparts.do?model=HD63&mospid=47404&btnr=11_1123&hg=11&fg=35



    Thanks

    ForcedInduction guest

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    Sure we can speculate but it really won't do you much good. ;) You need to go ahead and inspect your car and determine exactly where the leak is.
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    John in VA

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    mooseheadm5

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    If it isn't blowing back and is actually leaking from the vicinity of your driver's seat, I'd say it is your heater core.

    slinky66 guest

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    Found the souce of the leak

    Looks like the auxiliary water pump is leaking - All the hoses leading in and out of the pump are fine but when I looked at the aux water pump with a dental mirror, I saw the leak coming right out of the aux water pump, on the bottom of the pump
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    mooseheadm5

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    That sucks. Those are expensive.

    slinky66 guest

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    I found a Hella auxiliary water pump for $125.00 at USAAutoparts.net. Pelican Parts wanted $163.00 for the same part. -Tom
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    jfj707

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    I don't know how DIY-ambitious you are, but if the pump still works fine and just has a leaky housing, it may be re-sealable (possibly an o-ring). Also, just as a caution, sometimes leaks can be deceiving. I spent days chasing down a coolant leak on my old 530i that ended up being a hairline fracture in the thermostat housing. Gravity makes it hard to find the source ;) Not questioning your diagnosis, just throwing in my .02

    slinky66 guest

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    Coolant Leak Fixed

    Turns out that the aux. water pump was leaking from a seal. I replaced it - all better now. You can sort of see from the photo, that the coolant was escaping from a bad seal. Thanks to everyone for the input.

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