Results 1 to 7 of 7

Thread: Faulty fuel filter?

  1. #1
    DeLorean owner since 2011 Stainless's Avatar
    Join Date:  May 2011

    Location:  Syracuse, UT

    Posts:    553

    My VIN:    2087

    Faulty fuel filter?

    I purchased a new fuel filter and copper washers for all my fuel lines a couple of weeks ago from Josh at DPI in an effort to resolve some leaking connections. I torqued everything down to spec, but the new fuel filter had a leak coming from the top. Thinking that the banjo bolt wasn't tight enough, I cranked on it really good. To my surprise, upon testing it again, fuel was coming out even faster than the first test.

    Baffled, I removed the filter again to make sure I had the washers on the top and bottom of the fuel line, which I did. I reassembled everything, but it continued to pour out.

    This time upon inspection, I discovered the real cause: the fuel filter is leaking from the top lip where the body molds to the top and not from the banjo bolt. My question is, did I cause the body of the filter to separate when I was putting it in the car, or was this a faulty filter all along? Anyone else have a fuel filter leak like that?
    Jared L.

    June '81, manual, black inter. VIN 2087
    Other cars: 2012 Toyota Sienna, 2007 Mazda 6, 2000 Corolla, 1999 Jeep Cherokee
    DeLorean blog: http://deloreanblog.blogspot.com/

  2. #2
    Senior Member Silverbullet's Avatar
    Join Date:  Jul 2012

    Location:  Brea, CA

    Posts:    575

    My VIN:    3757

    I would say it was just a bad filter...

  3. #3
    Senior Member DMC-81's Avatar
    Join Date:  Apr 2014

    Location:  Florida

    Posts:    1,606

    My VIN:    <2000

    Club(s):   (DCF)

    Quote Originally Posted by Silverbullet View Post
    I would say it was just a bad filter...
    +1, I haven't had a bad fuel filter, however, and although relatively rare, I have had a few parts over my years wrenching on cars defective "right out of the box". I would call the Vendor.
    Dana

    1981 DeLorean DMC-12 (5 Speed, Gas Flap, Black Interior, Windshield Antenna, Dark Gray)
    Restored as "mostly correct, but with flaws corrected". Pictures and comments of my restoration are in the albums section on my profile.
    2006 Dodge Magnum R/T (D/D)
    2010 Camaro SS (Transformers Edition)

  4. #4
    President, DeLorean Industries
    Join Date:  May 2011

    Location:  CLE/PHX

    Posts:    2,347

    My VIN:    5646,5080, 5880, 10234, 3639, 2518, 10586, 1538

    Over tightening will break the top free. Especially if you are holding the bottom while tightening top etc. it doesn't take much to tighten these. Quarter turn past tight is all it needs. Is the top distorted from tightening?

  5. #5
    Senior Member
    Join Date:  Oct 2016

    Location:  San Diego, CA

    Posts:    102

    My VIN:    10353

    I didn't get mine from DPI but I can add that these filters are a pain! Just to get the lower connection to stop leaking I added pipe thread (not advised apparently) and then the whole filter bent from torquing the fitting. Thankfully no leaks now.

    I suspect you may have over tightened and broke the fitting, I'm surprised I didn't either though. Possibly a weakened/defective filter, hopefully Josh can send you a new one!

  6. #6
    Senior Member DMC-81's Avatar
    Join Date:  Apr 2014

    Location:  Florida

    Posts:    1,606

    My VIN:    <2000

    Club(s):   (DCF)

    Just in case you are trying to get your car mobile quickly, here are 3 part numbers to check at your local auto parts store, in order of quality (IMO):

    Bosch 0-450-905-401
    AC Delco GF519
    Fram G3747

    ...from this thread: http://dmctalk.org/showthread.php?93...Crossover-List

    I have not heard good reviews about Fram oil filters and therefore would not put one on my cars, but I don't know if the same thing applies to their fuel filters.
    Dana

    1981 DeLorean DMC-12 (5 Speed, Gas Flap, Black Interior, Windshield Antenna, Dark Gray)
    Restored as "mostly correct, but with flaws corrected". Pictures and comments of my restoration are in the albums section on my profile.
    2006 Dodge Magnum R/T (D/D)
    2010 Camaro SS (Transformers Edition)

  7. #7
    DeLorean owner since 2011 Stainless's Avatar
    Join Date:  May 2011

    Location:  Syracuse, UT

    Posts:    553

    My VIN:    2087

    Quote Originally Posted by Delorean Industries View Post
    Over tightening will break the top free. Especially if you are holding the bottom while tightening top etc. it doesn't take much to tighten these. Quarter turn past tight is all it needs. Is the top distorted from tightening?
    The body of the unit does not appear to be distorted, but it must be if it's leaking. I'll place an order for a new one and be sure not to over tighten or to tighten while holding the bottom.
    Jared L.

    June '81, manual, black inter. VIN 2087
    Other cars: 2012 Toyota Sienna, 2007 Mazda 6, 2000 Corolla, 1999 Jeep Cherokee
    DeLorean blog: http://deloreanblog.blogspot.com/

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •