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6.9L Diesels Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

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Old 01-09-2007, 06:52 PM   #1 (permalink)
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Leaking Injection Pump

I just replaced a fuel injection line and discoverd my injection pump is leaking fuel just behind the area where the injection lines connect. Is this repairable? If not, is replacing the pump a difficult job?
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Old 01-09-2007, 08:19 PM   #2 (permalink)
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Re: Leaking Injection Pump

replacing the pump isnt hard at all, you should put a new return line kit with new o-rings in it if you have it apart, takes a couple hours or so..
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Old 01-10-2007, 12:42 AM   #3 (permalink)
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Re: Leaking Injection Pump

If it's leaking make sure it's not leaking fuel into the crankcase as well.

I had the input shaft seal on my old pump go bad and it pumped a bunch of fuel into the crankcase by way of the gear drive to the pump.
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Old 01-10-2007, 05:14 AM   #4 (permalink)
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Re: Leaking Injection Pump

If you mean where the steel line from the filter connects to the IP see my gallery for the seal(s).

Visit http://www.intellidog.com/dieselmann/home.html check out IDI parts for the seal #s, they are also available at diesel repair shops.
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Old 01-10-2007, 06:01 PM   #5 (permalink)
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Re: Leaking Injection Pump

No, the leak is on the pump body where the conical part with the connection nipples joins the body. The fuel drains onto the pan and off the back of the block when I stop. Don't know what's happening while I'm driving. The engine runs fine. Is this the beginning of pump failure? [img]/ubbthreads/images/graemlins/shrug.gif[/img]

Also does anyone know where the part number is on the body? The Ford man says there are several differnet part numbers.
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Old 01-10-2007, 06:04 PM   #6 (permalink)
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Re: Leaking Injection Pump

No, the leak is on the pump body where the conical part with the connection nipples joins the body. The fuel drains onto the pan and off the back of the block when I stop. Don't know what's happening while I'm driving. The engine runs fine. Is this the beginning of pump failure? [img]/ubbthreads/images/graemlins/shrug.gif[/img]

Also does anyone know where the part number is on the body? The Ford man says there are several differnet Injection Pumps.
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Old 01-10-2007, 06:24 PM   #7 (permalink)
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Re: Leaking Injection Pump

where that piece connects on the pump--theres a oring inside--that seals it to the case--has to come apart to be fixed--and most repair shops wont do only that!!!! its called money---
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Old 01-10-2007, 10:44 PM   #8 (permalink)
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Re: Leaking Injection Pump

Is the O ring something I can fix or does it require special tools?
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Old 01-12-2007, 05:14 PM   #9 (permalink)
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Re: Leaking Injection Pump

It does'nt require special tools,but the pump will have to be partially taken apart.I've fixed lots of these pumps with great success.The seal kit can be bought at a diesel shop.Not for much,maybe $30 for all the seals and o-rings.If you can find a guy who has done this,it will be a easy fix.If you lived nearby,i would be willing to fix it for you for free.
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Old 01-12-2007, 07:41 PM   #10 (permalink)
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Re: Leaking Injection Pump

EBAY HAS ONE BUY NOW 29DOLLARS..
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Old 01-12-2007, 08:53 PM   #11 (permalink)
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Re: Leaking Injection Pump

To repair that oring it would be wise to remove the IP/lines... there are items inside that may fall out of place in the horizontal position. With it stood on end you will be able to repair it a little better or just run it over to a Stanadyne diesel repair shop......and have a pro do it.

Name City State Dealer Type DE Certified Dealer
1 MO'S DIESEL AND ELECTRIC INC. BELGRADE MT Service Dealer
2 SIGNATURE FUEL SYSTEMS BILLINGS MT Service Dealer
3 ORIGINAL EQUIPMENT, INC. Billings MT Central Distributor
4 PRO TECH DIESEL GLENDIVE MT Service Dealer
5 MIDWEST DIESEL SERVICE HAVRE MT Service Dealer
6 GOMERS DIESEL & ELECTRIC MISSOULA MT Service Dealer X
7 SIDNEY CARBURETOR & ELECTRIC SIDNEY MT Service Dealer

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Old 01-13-2007, 01:28 PM   #12 (permalink)
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Re: Leaking Injection Pump

Thanks everyone. I was off-line for a couple of days so didn't get the last messages until now. In the meantime I did purchase a rebuild for $420 at Diamond Diesel in Sacramento, CA where I am now. I'm trying to get on my way next week to AZ for the winter. I will install the pump this afternoon but I'm told I should have a pro do the timing. Any thoughts on this?
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Old 01-20-2007, 06:05 PM   #13 (permalink)
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Re: Leaking Injection Pump

Hey guys. Thanks for your help. I installed the re-built injection pump and then had it timed by Ken Imler Diesel in Sacramento and now my truck runs like new. I can zip over hills one gear higher and I'm getting 1 to 2 mpg more while towing. Didn't know my old pump was that bad. I thought it was only leaking a little. [img]/ubbthreads/images/graemlins/smokin.gif[/img]
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