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Detroit 60 series, fuel in the oil ?
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Jon Hagen
Posted 9/23/2009 12:51 (#857271)
Subject: Detroit 60 series, fuel in the oil ?



Hagen Brothers farms,Goodrich ND
The 92 Volvo I just got with 60 series Detroit, gets fuel in the oil.
If this was one of my old familiar 2 cycle Detroit's, there would be a 99% chance that the problem is a cracked fuel line from fuel rail to injector under the valve cover.

I am not at all familiar with a Detroit 60 series, do they have internal fuel lines like the old ones, or where would be the most likely source of this internal fuel leak ?

Any help on what to look for is appreciated.

TIA.
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bollpuller
Posted 9/23/2009 16:36 (#857430 - in reply to #857271)
Subject: Re: Detroit 60 series, fuel in the oil ?



Grandfield, Ok.
Injector leaking. Usually it is a gasket cost about $12 to repair most want to sell u an injector.
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Jon Hagen
Posted 9/23/2009 17:29 (#857448 - in reply to #857430)
Subject: Re: Detroit 60 series, fuel in the oil ? (PIC)



Hagen Brothers farms,Goodrich ND
Thanks bollpuller, a picture I found on Ebay shows what looks like three O rings that seal between the injector and fuel passages in the head. Like you say, looks like a fairly inexpensive fix.
I suspect this leaking O ring is also what is causing it to get air in the fuel system when fuel is low and after a long shutdown.

Edited by Jon Hagen 9/23/2009 17:41




(Detroit 11.1 and 12.7 injector.jpg)



Attachments
----------------
Attachments Detroit 11.1 and 12.7 injector.jpg (17KB - 112 downloads)
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milofarmer1
Posted 9/23/2009 18:37 (#857491 - in reply to #857271)
Subject: Re: Detroit 60 series, fuel in the oil ?



Farwell, TX/Pleasant Hill, NM
Also check to make sure you are not getting fuel in your coolant, or vice versa. I had that happening and they thought it was an o-ring, or a injector cup at first. Turned out to be a cracked head. Those injectors go through the coolant passage and fuel and hold back oil. Not to scare you but a $200 fix turned into a $6k head replace.
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bollpuller
Posted 9/23/2009 21:41 (#857758 - in reply to #857271)
Subject: Re: Detroit 60 series, fuel in the oil ?



Grandfield, Ok.
The leak will be in area of the 4 screws in the top of your picture.
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Jon Hagen
Posted 9/23/2009 21:53 (#857791 - in reply to #857758)
Subject: Re: Detroit 60 series, fuel in the oil ?



Hagen Brothers farms,Goodrich ND
bollpuller - 9/24/2009 20:41

The leak will be in area of the 4 screws in the top of your picture.




Ah ha, then it can leak fuel in the injector body itself, instead of at the o rings between the injector and head.

That looks like an easier fix than removing one or all injectors to replace O rings. Thanks :-)




Edited by Jon Hagen 9/23/2009 21:54
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Ed Boysun
Posted 9/23/2009 22:36 (#857909 - in reply to #857448)
Subject: Re: Detroit 60 series, fuel in the oil ? (PIC)



Live life to the fullest It has an expiration date

Jon, when my C12 started making oil like that, it was an injector O-ring, about like the one the Cummins uses. I took off the valve covers and pumped the hand primer. Leaking ring left a nice puddle of fuel on the top of the head right next to the bad one and that's the only one we needed to pull to replace the bad O-ring. Use something real slippery on the new ring, when you re-install. Pure STP seems to have done the job for me.

Might should drain the fuel rail after you've found the culprit, so it doesn't all run into the combustion chamber and wreck things when you first start it up.

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