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  #1  
Old 06-19-2006, 04:51 PM
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Is that normal ??? Fuel filter picture

Is it normal for this filter to have air in it along with the fuel ?



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Old 06-19-2006, 05:08 PM
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EDIT: Sorry, I misread.

He is correct, a small bubble as shown is perfectly ok.

When it starts getting bigger you know your low on fuel... or at least its that way in my car.

Last edited by 1985 300SD Sady; 06-19-2006 at 05:50 PM.
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  #3  
Old 06-19-2006, 05:30 PM
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To answer the original question it is perfectly ok to have an air bubble in the pre-filter.
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  #4  
Old 06-19-2006, 05:38 PM
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Ok thanks !
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  #5  
Old 06-19-2006, 05:53 PM
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How long has that filter been in service? Looks way overdue for replacement.

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  #6  
Old 06-19-2006, 06:41 PM
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Filter is dirty and needs to be changed, the fuel line also looks old and is probably due. I'd replace original primer pump as well.

But yes an air bubble is normal.
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  #7  
Old 06-19-2006, 07:48 PM
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What is that ugly black junk in that filter?
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  #8  
Old 06-19-2006, 08:03 PM
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small - 3 bb sized (smaller than dime)

when racing the engine if you see air coming in thats a problem.
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  #9  
Old 06-19-2006, 09:47 PM
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Bubble- normal
Color- slightly normal (old filter)
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  #10  
Old 06-19-2006, 09:48 PM
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No its not, the filter is put on the correct way.
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  #11  
Old 06-19-2006, 10:46 PM
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I wanted to replace BOTH filters by my local autozone is Out of stock on both.
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  #12  
Old 06-19-2006, 10:48 PM
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Autozone is unable to supply parts for Mercedes, I would avoid them as much as possible.
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  #13  
Old 06-19-2006, 11:03 PM
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Quote:
Originally Posted by Hatterasguy
I'd replace original primer pump as well.
Unless it's leaking, it shouldn't need replacement.
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  #14  
Old 06-19-2006, 11:06 PM
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No need to throw parts at the problem.

If it ain't broke, don't fix it.

Unless that primer pump leaks, don't replace it.

The fuel filters are cheap enough to replace whenever they get black like that, however.
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  #15  
Old 06-19-2006, 11:08 PM
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My theory is its old, I'd rather replace it so it doesn't break (or in this case leak) on me.

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