Check valve on return line fuel system - Diesel Forum -
7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 02-26-2009, 06:40 PM Thread Starter
Junior Member
Join Date: Aug 2008
Posts: 15
My Photos: (0)
Feedback Score: 0 reviews
Check valve on return line fuel system

I was putting a return line cap and o-ring kit on my truck. I have been having problems with air in the fuel system. Please correct me if I am wrong, but the check valve in in the brass fitting where the return line goes into the fuel filter head. I pulled this fitting and I can see completely through it and blow air both directions. This is definitely a problem right?

Where can a get one of these? I have called around and of course can't find such a thing at the usual parts sources.

I just found an exploded diagram of the filter and filter head and it shows the part in question as "fuel return orifice and check valve", so this should be a check valve and is definitely a problem with getting air in the system. So the big question is where to get a replacement? I know of several of these engines in a nearby junkyard.
calvin767 is offline  
Sponsored Links
post #2 of 2 (permalink) Old 02-26-2009, 09:28 PM
Senior Member
cdnsarguy's Avatar
Join Date: Jan 2003
Location: Neepawa, Manitoba Canada
Posts: 20,672
My Photos: (109)
Feedback Score: 0 reviews
Go to...... Ford diesel 6.9 7.3 IDI the number should be there ...... IH or Ford maybe a diesel shop....... in the mean time just hook up the hose and clamp it off in the middle.

7.3 Fuel filter orifice/check valve; 1/4" E9TZ-9K061-A

Ford diesel 6.9 7.3 IDI do some reading...... some parts are not available on the IDI parts area..

93 F250 7.3 IDI S/C XLT 4X4 E40D 3.55LS, Captains chairs, Tutone Mocha, Leer 48" Hiboy cap, FR & RR hitches, full DeeZee running boards. Factory ordered/delivered Jan 93

Toys: 2006 37' Triple E Embassy coach (powered by Cummins), 18' Sylvan Pro Fish with Mariner motors.

Proud Canadian BOOB man too!!

Please PRIVATE MESSAGE only!! ...
Please DO NOT.....visitor message me...
cdnsarguy is offline  
Sponsored Links

  Diesel Forum - > Ford Diesels > 7.3L IDI Diesels (Not Power Strokes)

Quick Reply

Register Now

In order to be able to post messages on the Diesel Forum - forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome