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  #41  
Old 09-13-2018, 10:45 PM
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Thanks for the reply...

My "new" approach after reading your reply is:

1. Inside the city, I guess it is not an issue b/c in the rare event (1% chance the siphon pump failure), I am always close to a gas station (or AAA etc.).
All it takes is a trip to the gas station with a gas can and the problem is solved.
This should be a very rare occurrence.

2. On long trips with gas stations far apart, I will just fill it when it is a tad above 1/4. Sure and safe way of staying out of trouble, given that the siphon pump is a potential Achilles heel of this (and many BMW) car. Life is too short to worry about this siphon pump thingy...
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  #42  
Old 09-13-2018, 10:50 PM
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Quote:
Originally Posted by andrewwynn
...The test should be performed periodically to test the siphon jet...

I've heard of people getting over 200,000 miles on their siphon jet but ours both failed before 150,000.
A counter-argument to this is that: a good test today on the siphon pump does not mean it will not fail tomorrow!

Anyway, I am happy with my solution above for long trips...
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  #43  
Old 09-13-2018, 10:51 PM
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I agree with your thought for sure until the siphon jet is worked on. That can be "punted" down the road for a good while. If the main pump fails I would fix the siphon jet at the same time.

Case in point: after I already fixed wife's siphon jet at 131,000 I didn't yet fix mine at 150,000+ because I knew it was working (until It didn't). I always wait for my low fuel light.

Sure enough my o-ring blows and I stall with about 50 mile to empty.

I knew it was siphon jet before I even put in 2 gal to get home.
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  #44  
Old 09-13-2018, 10:54 PM
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Quote:
Originally Posted by cn90 View Post
A counter-argument to this is that: a good test today on the siphon pump does not mean it will not fail tomorrow!



Anyway, I am happy with my solution above for long trips...


That is quite true hence "periodic" test and also I recommend preventive maintenance on the siphon jet at 120,000 miles or 4000 hours. One zip tie will prevent the failure.


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  #45  
Old 09-14-2018, 11:06 AM
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Quote:
Originally Posted by cn90 View Post
@Feeze,

- That Chinese fuel pump you bought on amazon will fail in a bout 1y/12K miles, which ever comes first.

- Search ebay for "E53 Pierburg fuel pump", about $150. This is ONLY fuel pump, not the entire assembly. Pierburg is OEM.

- Keel fuel level above 1/4 at all time...
@cn90,

Thanks for the heads up ...... it looked identical to the one I pulled out.

i'll keep everyone posted when it fails......
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