oil leak fix

Lucas will slow the leak by thickening the oil,but that won't last long and from what your saying the leaks sound excessive. Why can't you put a new pan gasket on with permatex? As for the leak up by water pump. You need to clean it well and see exactly where the leak or leaks are coming from. If the leaks are at the bolt holes u need to pull the bolts and seal them. If it's coming from the whole plate up front. Then there is no way around it you have to put a new gasket there. It really depends on how bad the leak is. If your losing oil on the stick then it's probably bad enough to fix. If your not losing so much oil that you need to add between oil changes, then clean it and run it.

 

You have to find exactly where it is leaking. Common places on the Detroit include the front cover like you said, oil fill tube, oil cooler (where the oil filters attach), oil pan. For the front cover I have a retrofit Detroit number that adds stiffening braces If you havent already done that. that should help eliminate front cover leaks. I met a guy with over a million on his rebuild and his Detroit had zero leaks. The oil fill tube should be an easy fix.

 

The oil filter housing may not need to be fixed, there is a gasket kit for it. The oil fill tube was leaking on mine like crazy because it is actually four pieces. I think on freightliners it is one piece. Just silicon to the block should work. Mine had a fitting to the block with large threads on top, then a barb that screws into the fitting, a hose attached to that and finally the fill tube attached to the hose. All sorts of places to leak and boy did it ever. The worst was the barb was just loose on the fitting not screwed in at all. Plus the hose leaked. You can imagine the mess. I think the guy sold the truck because of that thinking it was blowby since they're right next to each other.

 

http://www.ddcsn.com/cps/rde/xbcr/ddcsn/23-60-01.pdf

There you go.

I have a pdf engine service manual from 2006 if you want it. PM me your email.