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Old 01-20-2020, 05:46 AM
Danno123 Danno123 is offline
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Intermittent windshield washer fluid leak

This is a weird one. I've noticed that I use a lot of windshield washer fluid and have suspected for a few months that there's a leak. Yesterday, I put about half a gallon of fluid in and the washers worked fine while I drove a couple hours on the highway. I drove the car this morning and parked it in the garage. A few minutes later, I went out to the garage and could hear fluid leaking from near the reservoir. I put a cup down under the car and, sure enough, it was streaming blue washer fluid. The thing is, however, the leak appears to be intermittent because it wasn't streaming fluid out yesterday or it would have emptied the reservoir in about 5 minutes at the rate it was leaking. I believe the most common points of failure are the gaskets that hold the pumps in place. But I don't know why a gasket would hold for 24 hours and then all of a sudden start to leak. Any ideas? Also, does anyone who has done this job have any pointers?

Now that I think about it, I suppose it could have been coolant, which is also blue. But I heard it leaking from near the washer reservoir. I'll check coolant level just to make sure.
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  #2  
Old 01-20-2020, 05:50 AM
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Doug Huffman Doug Huffman is online now
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Dab a finger and taste the fluid. WW fluid has alcohol as antifreeze. Coolant has sweetish tasting glycol as antifreeze. A taste of neither will harm you.
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Old 01-20-2020, 10:32 AM
FredoinSF FredoinSF is offline
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Not sure if this would apply to the E70 but on the E46 the pump is at bottom of tank and with age the o ring fails and you get a leak. Happened on my E46 at 11 years of age. Was my first repair on that car.
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Old 01-20-2020, 11:02 AM
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The pumps on all BMW WW reservoirs are on the bottom to provide Net Positive Suction Head for efficient pump operation without priming.
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Old 01-21-2020, 06:59 AM
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1bad540 1bad540 is offline
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Quote:
Originally Posted by FredoinSF View Post
Not sure if this would apply to the E70 but on the E46 the pump is at bottom of tank and with age the o ring fails and you get a leak. Happened on my E46 at 11 years of age. Was my first repair on that car.
My e46 currently doesnt hold any fluid either. need to address when warmer!
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Old 01-21-2020, 09:31 AM
DEADF15H DEADF15H is offline
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Having the same issue. I'm going to to pull mine and have a look. Not as easy a job as it was on my E46. I think you have to remove the fender liner to get to it. Was going to to replace the seals first, before buying a pump, unless I can tell it's obvious the pump is the culprit.

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Old 01-21-2020, 09:39 AM
twh twh is offline
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Yea, on the X5, it is a bit of a PITA to get to the pump. You have to hack out the one-time-use plastic rivets holding the fender liner in place. Then you have to reach your hand in there -- the fender is flexible, so don't worry about that. Replacing the fender rivets, you'll need a rivet install tool that handles that diameter of pop-rivet.
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Old 01-21-2020, 12:04 PM
Masoe Masoe is offline
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Please check out this link..hope it helps. https://www.bimmerfest.com/forums/sh...dshield+washer (fix starts at post #24) good luck.

BTW, i got the Pop rivets and Gun from Harbor Freight for about $17 bucks (https://www.harborfreight.com/hand-r...ets-97757.html)
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Last edited by Masoe; 01-21-2020 at 12:07 PM.
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Old 01-21-2020, 12:13 PM
twh twh is offline
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Quote:
Originally Posted by Masoe View Post
BTW, i got the Pop rivets and Gun from Harbor Freight for about $17 bucks (https://www.harborfreight.com/hand-r...ets-97757.html)
That looks like the one I have although I didn't get it at Harbor Freight.
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Old 01-23-2020, 06:54 AM
Danno123 Danno123 is offline
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Thanks for the link to the Harbor Freight pop rivets and gun. I'll pick one up. Unfortunately, I'm in Michigan and have an unheated garage. I hate working on the car in the winter because plastic pieces get so brittle. BTW, for those thinking about tackling this job, I've found two online resources:



https://www.newtis.info/tisv2/a/en/e70-x5-xdrive35i-sav/repair-manuals/61-general-vehicle-electrical-system/61-67-headlight-cleaning-system/OHQvske

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Old 01-24-2020, 01:34 AM
sirox101 sirox101 is offline
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i also had a bad leak on my e70 turned out to be the line had a break in running to the rear washer leaking in drivers footwell , i disconnected the rear line until i get time to lift out the carpet and trim to find leak


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