Complete Fuel Bowl Seal Kit 99-03

Part Number:



Complete Fuel Bowl Seal Kit for Ford 7.3L (99-03) - GZ-7-003

11 Viton o-rings and 4 Parker® fuel sleeves. 3 Viton (type A) or 3 Viton (type B) or or 3 Fluorosilicone o-rings for the 7.3 yellow fuel drain valve core

  1. 1 o-ring for the drain valve stem
  2. 2 o-rings for the drain valve to bowl seals
  3. 2 o-rings for the Water-in-Fuel sensor/Fuel Heater
  4. 1 o-ring for the Fuel Pressure Regulator housing
  5. 1 o-ring for the regulator piston bushing
  6. 2 o-rings for the fuel back check piston assembly
  7. 2 o-rings for bowl plugs
  8. 2 - 1/4" sleeves for the fuel lines feeding the cylinder heads
  9. 1 - 5/16" sleeve for the fuel return line
  10. 1 - 3/8" sleeve for the fuel feed line.

Order of 1 is a set of 11 o-rings and 4 sleeves.

NOTE: This kit does not contain the REGULATOR POPPET SEAT. This is a separate kit only available as a FORD kit. The Regulator Rebuild kit can be purchased separately as F81Z9B249BB on our website.

NOTE: If you remove the fuel rail lines from the cylinder heads, this kit contains the fuel sleeves for the filter bowl ends only. It is recommended to also replace the sleeves on the cylinder head end of the fuel rail lines once they have been removed as they will no longer seal properly.  Order part GZ-7-004 to supplement this kit.


O-ring Identification Chart - Click Here

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  • 5
    Best quality for the $

    Posted by Darren on Nov 11th 2018

    Correct fit and shipped to me fast

  • 5
    7.3 Fuel Bowl Rebuild

    Posted by Unknown on Sep 18th 2018

    Thanks for the great parts and the other reviews here that helped my pull the trigger on this kit to rebuild my leaking fuel bowl. The parts are quality and the included reference chart made it easy to make sure the correct rings got into the right places. Whole project took just over 2 hours and worked like a charm to stop diesel from accumulating in my valley.

  • 5
    one stop shop

    Posted by George on Aug 13th 2018

    it sure is nice to be able to talk to an intelligent person and get your problems solved the first time. Thanks to Clay, I got all the info I needed the first time at a great price too.

  • 5
    Very simple

    Posted by Unknown on Apr 24th 2018

    Very easy to tell where every thing goes by the paper that comes with the kit can't go wrong with this.

  • 5
    Quality items

    Posted by Jeff on Feb 13th 2018

    The only way it could get better is if they would pay me to take their great products!

  • 5
    Worked great

    Posted by Cam on Feb 10th 2018

    Tore apart my fuel bowl to find out every single seal was bad. Truck loped at start and was getting air in the system. Ordered a pressure relief valve and new drain valve as well. Diesel ORings and Motocraft parts very happy with my purchase

  • 5
    7.3 fuel bowl rebuild kit

    Posted by JUNIOR on Jan 31st 2018

    Worked great had no problems what so ever.

  • 5
    Fuel bowl o-rings

    Posted by Unknown on Jan 27th 2018

    Great fit no leaks

  • 5
    Fuel bowl rebuild

    Posted by Unknown on Jan 25th 2018

    A very easy and economical fix for a leaking fuel bowl. Very clear and concise instructions included.