Seems like I'm having tons of problems lately.

I decided to check my Oil today after a trip and noticed that it has a green tint to it and seems pretty thin. This oil had maybe 500 miles on It so its not old. The oil level may be up just a Tad but I can't say it is. Coolant level doesn't seem to have changed.

Truck runs fine but I have noticed the fan clutch stays engaged most of the time. I just replaced it with a new one a week ago because the old one wouldn't quit running. So now it runs 90% of the time instead of 100%.

Anybody know Where to start?


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Let it sit overnight then check the coolant in the radiator. See if there isn't a black sheen to it.

 

What kinda of oil did you use?

 

possibly diesel in the oil, smell it. diaphragm on lift pump rupture leaks fuel into crankcase, or IP front seal.

 

I noticed this yesterday When I returned from the trip then I checked the Coolant in the radiator and it was green as it should be with no abnormal coloring.

I used rotella 15-40 as I always do.

Also I have heard about the diaphragm on the lift pump causing fuel to enter the crankcase but I don't smell any diesel. Would it have a very noticeable diesel smell if it were fuel?

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Diesel fuel has a green tint.
For road Tax ID.

 

Antifreeze in the oil makes it a foamy slimey chocolatey color. Diesel in the oil just thins it out

 

Sounds like it might be diesel then. How could I check the lift pump to see if its the diaphragm?

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The fuel in oil has seemed to have happened since I did the governor spring and timing bump. Could the front seal be leaking on the injection pump allowing fuel in the oil? Is there anything else I could have done to cause it?

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Maybe some of the WOT runs you tried after the tweaks did your lift pump in.
Don't try to say you didn't
Seriously though, more fuel @ more RPM may have pushed it over the edge.
Was it old?

 

It is the factory lift pump. I took it off tonight to see if there was anything noticeable about it and I didn't see anything. I have some pics of the oil I will uploads in just a minute.

 

Ok here is 2 pictures, one is of oil I put on a paper towel and the other is under the valve cover. I'm not sure how good the green will show up but I'll post them anyways.

 

Looks wet to me.

I'd say the paper towel shows the wet in the perimeter of the oil. The second image presents as milky . . .. to me. It may not be big, but it's there.

Dunno . ..




A little oil in the antifreeze makes the chocolate-swirl . . . . in the radiator? Correct?
A lot of antifreeze in the oil make the chocolate milkshake . . . in the oil-pan? Correct?

I would agree that fuel in the oil would thin the oil with no appreciable color change.



I though over the road diesel was it's natural color, and the NON highway taxed diesel was colored red.

 

Seeing how you have the stock lift pump off. It wouldn't hurt to throw $90 at a LP piston pump,not to mention the extra piece of mind while possibly remeding the problem

 

Why not just take the truck for a drive(get it good and warm) and then take a sample and have the oil anaylized. Then you know exactly what is going on. Seems like cheap insurance to me.