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Diesel fuel mixing with my engine oil?

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Old 06-24-2015, 03:01 PM
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Diesel fuel mixing with my engine oil?

When checking my oil it is always overfull. Even after an oil change a short time later it is more full that what I put in. Any ideas on a way to locate the problem? It is a 2001 Dodge Ram 2500
Old 06-24-2015, 05:41 PM
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If it is saturating with diesel you have a leaky injector or worse a hole in a piston.

A leaking injector would have other symptoms also, like loss of power, rough idle, smoky exhaust....

That is where I would start investigating.
Old 06-24-2015, 05:51 PM
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Thanks for the info. Any ideas on how to check which one might be the problem, rather than taking them all out?
Old 06-24-2015, 06:56 PM
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Can also be a transfer tube leaking on a 24V.......

I don't know how you would diagnose it though, how many miles on it?
Old 06-24-2015, 07:47 PM
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I have 200,300 miles on it. Thanks for the info.
Old 06-25-2015, 08:12 AM
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Hang loose, one of the 24V guys will chime in I am sure.

I assume it runs well, no miss, knocks, farts?
Old 06-25-2015, 08:25 AM
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Yes, it runs well. It has an occasional hard start.
Old 06-25-2015, 09:35 AM
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Been there, copper washers on the injectors leaking fuel as well o-rings on injectors clean and change to start, even transfer tubs O-rings to start. If it still persists than I hate to say its the injection pump seal but do the first its the cheapest, or upgrade injectors at that time
Old 06-25-2015, 01:55 PM
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There you go dodge_guy. I'd check out what Dieselbuilder says since he's experienced it.

Let us know if it's the fix!
Old 06-25-2015, 05:42 PM
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If you are getting that much fuel in the oil, I would be very hesitant to run it until it's fixed. Fuel/oil dilution will compromise the oil's ability to lubricate, putting your bearings, camshaft, lifters, rocker arms, valves, and everything else that moves inside your engine at risk for lack of proper lubrication. The more fuel in the oil the greater the impact.

Fuel oil dilution is something we test for daily on our large diesel engines on our cutters/ships if they have low pressure injection/fuel delivery, and every 4 hours if the engine has high pressure injection and/or high pressure lines are internal to the crankcase. That included main propulsion engines and the generators. Fuel oil dilution/oil thickening is tolerable to a very limited extent (don't remember the specification off hand). Beyond that limit signals there is a problem with that engine.

Hope you get yours figured out soon.
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