New vs old fuel filter. Which to use? | FerrariChat

New vs old fuel filter. Which to use?

Discussion in '308/328' started by RichardAguinsky, Jul 4, 2009.

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  1. RichardAguinsky

    RichardAguinsky Formula Junior

    Nov 12, 2007
    478
    Palo Alto, Californi
    Full Name:
    Richard Aguinsky
    #1 RichardAguinsky, Jul 4, 2009
    Last edited by a moderator: Sep 7, 2017
    I am in the process of changing the fuel filter and fuel lines on my 1984 Mondial QV Cab and I have a question about the new replacement fuel filter.

    The original filter is a Bosch 0 450 905 601. This is a common filter, used in Volvo 240 , etc.

    Now Ferrari replaced it with a Bosch 0 450 905 203. Not such a common filter.

    See pictures below. The new filter is smaller and the intake fitting does not fit, the thread on the new filter is smaller. I would need to find a new fitting and a smaller bracket to secure the filter to the chassis. These did not come with the new filter.

    Should I get new fittings and make a new bracket for the smaller 203 filter or should I get the original 601 and keep the existing hardware? To me, it seems like a larger fuel filter would be better.

    Thank you in advance.



    BTW. I finally found the smell of gas. One of the fuel lines had a very small hole. The fuel would fall in small drops on the chassis at about 1 to 2 drops per minute. It would evaporate before reaching the ground.
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  2. mustardfj40

    mustardfj40 Formula 3

    Jun 17, 2004
    1,142
    Northen California
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    Ken
    I've just replaced my fuel filter recently and I got it from T-Rutland, it was the same as the old one. I love to keep my Ferrari close to original as I can.
     
  3. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    Jan 11, 2001
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    #3 Steve Magnusson, Jul 4, 2009
    Last edited: Jul 4, 2009
    No way! Someone just made an inventory/shipping/look-up mistake. You can buy the (exact) ...601 Bosch fuel filter at www.importeccatalog.com for ~$12.50 -- just type the Bosch PN in the search box.
     
  4. RichardAguinsky

    RichardAguinsky Formula Junior

    Nov 12, 2007
    478
    Palo Alto, Californi
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    Richard Aguinsky
    Thanks, Steve!! I just ordered the Bosch 601 from these guys.

    I can get the Fram one locally for the same price. But the Bosch seems to be better quality, heavier.
     
  5. eurogt4

    eurogt4 Karting

    Apr 15, 2006
    243
    Sacramento, CA
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    Mike
    I have opened up bosch filters and aftermarket supposed exact replacements and have found that the bosch filter was constructed much sturdier and had a far greater amount of filtering media. Always use bosch
     
  6. mike996

    mike996 F1 Veteran

    Jun 14, 2008
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    #6 mike996, Jul 8, 2009
    Last edited: Jul 8, 2009
    Never use a Fram anything. The Fram of today is NOT the Fram of 30 years ago. Back then we wouldn't recommend anything BUT Frams on our engine rebuilds. As of 2006, when I quit doing it professionally, we wouldn't allow them on any car we worked on. Generally speaking we used Baldwins on everything that Baldwin made a replacement for.
     
  7. RichardAguinsky

    RichardAguinsky Formula Junior

    Nov 12, 2007
    478
    Palo Alto, Californi
    Full Name:
    Richard Aguinsky
    Folks,

    I just received the Bosch fuel filter from Importec. It is rattling inside.

    Is this normal or is it damaged? The rattling comes from a piece at the exhaust of the fuel. I am not sure if this is a valve or if the filter is bad.

    Please let me know. The old one does not rattle and I don't have a good new one to compare to. The new little one does not rattle inside. The Fram ones at Kragen does not rattle either.

    Thanks in advance.
     
  8. thecarreaper

    thecarreaper F1 World Champ
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    Sep 30, 2003
    18,120
    Savannah
    none of mine have ever rattled. i would return it unless someone comes up with a better reason not too.

    the fuel dizzy is too expensive to risk something getting sucked into it.
     
  9. RichardAguinsky

    RichardAguinsky Formula Junior

    Nov 12, 2007
    478
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    Richard Aguinsky
    Just called importec.

    9 of 10 of the Bosch fuel filters rattle inside. Was this a bad batch?
     
  10. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #10 Steve Magnusson, Jul 9, 2009
    Last edited by a moderator: Sep 7, 2017
    In the hex shape formed at each end there is a steel hex nut captured inside the sheetmetal as shown in these photos. If that's what is rattling (because the nut is a little "loose" inside the sheetmetal before the fittings are added), I wouldn't worry about it (because when you add the external fittings + Cu washers it will all "tighten -up"). Is it these "nuts" that are rattling or something deeper inside?
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  11. thecarreaper

    thecarreaper F1 World Champ
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    Sep 30, 2003
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    excellent post as always, i never cease learning from your examples.
     
  12. RichardAguinsky

    RichardAguinsky Formula Junior

    Nov 12, 2007
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    BRILLIANT!!!

    It was the hex nuts inside, both sides. I'll let Importec know tomorrow, as they are contacting Bosch.
     
  13. fastradio

    fastradio F1 Rookie
    BANNED Professional Ferrari Technician

    Apr 26, 2006
    3,664
    New England
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    David Feinberg
    Sorry to be so late to this party...Steve's assessment is spot on.

    20+ years ago, this was a known problem on the Bosch fuel filters, that seemed to be there on some filter, but not present on others, even with the same PN.

    David
     
  14. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #14 Steve Magnusson, Jul 9, 2009
    Last edited: Jul 9, 2009
    Thanks for the kind words gents (and thanks to the earlier poster, who I can't remember, for posting those filter dissection pictures which made the explanation much easier/clearer).

    What's funny is that it probably is batch-related (but it's a non-functional "problem") -- on some runs the sheetmetal hex shapes may be a little smaller so the nut(s) doesn't(don't) rattle around. I do think, though, that it's a good example of how some completely non-functional issue can be perceived by the customer as "low quality". On an old product like this filter, Bosch isn't going to be concerned (or do anything about it ;)), but a note on the box saying something like "the internal end nut fittings may rattle slightly before your external end fittings are installed -- this is normal", or adding some strategic dimples in the sheetmetal, so the nuts don't rattle (even if the overall hex shapes in the sheetmetal are slightly oversized), probably would've prevented a lot of unnecessary returns.
     

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