Diesel in engine oil, thoughts?

[paccrest]

I have a turbocharged multifuel engine in my 1963 Duece. The oil volume continues to rise with more hours on the truck. I just changed the oil and about every 400-500 miles it shows that is is about 2 quarts high. I drained it off and it continues to rise. The oil does not smell particularly like diesel but it is definitely not water as the oil is black not milky at all. I am assuming that it is diesel leaking in from somewhere. I am not a mechanic but from what I can gather the only place oil and diesel are in the same area would be at the injection pump. Maybe a bad seal? Not sure. Any thoughts of what this could be so I can get the parts and remedy the problem as soon as possible would be very helpful. I would be especially interested in comments from someone that had the same problem. If not though, any help would be appreciated. Thanks.

Bret

 

[porkysplace]

Sounds like the FDC is leaking , here is a thread on bypassing it , read the whole thread.
[h=1]FDC bypass info (yes, again)[/h]

 

[Turbo Detroit]

Sounds like maybe Hydraulic Head O rings leaking. I had the same issue a year ago i bypassed FDC first and the issue still persited so i changed hydraulic head o rings and problem solved. It can be three different places to get diesel in oil. Hydraulic Head, FDC, and the Mechanical fuel pump on the injector pump. Good Luck. I got my O rings from a steelsoliders member welldigger.

 

[paccrest]

Thank you! Are there others that have had this problem? I would love to hear from you.

Bret

 

[fsearls92]

I had one of my M-35's "making oil" and the fdc bypass fixed it right up. Just make sure to do it asap and change the oil as soon as you do the bypass. You can also take a sheet of copy paper and let your dipstick drip a drop of oil, if it has diesel in it, it will make a "rainbow" around where the oil dripped on the paper.

 

[18operator]

paccrest: When are you checking the oil? Before you start the engine, or about a minute after shutdown? If you check it before start up the dipstick will read high. Proper procedure is to check the engine oil approximately a minute after engine shut down. As per instructions on the dipstick.