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Old 10-19-2016, 01:40 PM   #1
SCOTIA54
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Fuel filter bypass?

Just bought my first bmw,its a 2000 323i that is not running right now. I am changing the fuel filter and from what I see it does not look like what I've seen in the manual or other posts.It is a bmw filter but there is only one line in and one line out.There is a blue hardline coming from the rear which is attached to a hose that goes around the actual pump,almost like someone has bypassed something.Also doesn't look like there is a regulator on the front side of the pump.Sorry for the newbie question if this is something standard,if I could figure out how to post pics I would. Thanks.
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Old 10-19-2016, 02:11 PM   #2
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Originally Posted by SCOTIA54 View Post
Just bought my first bmw,its a 2000 323i that is not running right now. I am changing the fuel filter and from what I see it does not look like what I've seen in the manual or other posts.It is a bmw filter but there is only one line in and one line out.There is a blue hardline coming from the rear which is attached to a hose that goes around the actual pump,almost like someone has bypassed something.Also doesn't look like there is a regulator on the front side of the pump.Sorry for the newbie question if this is something standard,if I could figure out how to post pics I would. Thanks.
You probably have the earlier setup as you described. Most manuals and DIYs are for the newer setup with the reg built into the filter.
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Old 10-19-2016, 02:18 PM   #3
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That line bypassing the filter is undoubtedly part of the vapor recovery system...I'm pretty sure.

My filter was one line in and one line out...later models have two lines in on one side and one out the other...or so I believe.

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Old 10-19-2016, 02:39 PM   #4
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Go onlline to realoem.com and look at the filter parts.

You do not have a pump there, rather a valve with a return to the tank.


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Old 10-19-2016, 02:43 PM   #5
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Thanks for the quick replies on this folks.
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Old 10-19-2016, 02:46 PM   #6
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My bad guys.when I used the word pump on my first post,I meant filter.
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Old 10-19-2016, 07:25 PM   #7
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i think (like others said) it's because you have a 323/328 that is the M52TU engine unlike the M54 323/330
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