Check valve on return line fuel system - Diesel Forum - TheDieselStop.com
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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.

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Old 02-26-2009, 07:40 PM   #1 (permalink)
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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.
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Old 02-26-2009, 10:28 PM   #2 (permalink)
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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..
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