turbocharger on 3406e cat leaking oil

i might be missing something here ,what flat plate? the only o-ring that i know about on a turbo is the 2 on the elbow that pushes into the charge side of the turbo.

 

If you take the arrangement number off the valve cover and the serial number of the engine to any Cat dealer they can give you the correct part. I would bet it is the plate with the seal ring, as an integral part of it.

 

i have never seen that on a 3406E turbo unless you have a off brand turbo. except for the return oil tube ( 2 bolts and a metal gasket with a o-ring inserted in the middle. if so just take your arrangement # and serial # to cat and they will get you the right one.

 

Most and I'll repeat this MOST 3406E engines use a intergrated seal and plate at the oil lines for the turbo

supply line is part number 126-2704

return line is part number 126-2702

Now I've also seen a 5EK with an O-ring on the oil supply line........... part number 6J-2245 or intergrated seal and plate 198-6068

This same engine also could have used an O-ring on the return oil line........ part number 6V-6228

The best thing to do is have the parts people look it up with your particular engine serial number.........but the above mentioned 5EK has both part numbers listed for these lines..........if you have this problem then tear it down and see which you have and hand carry your old parts in to allow the parts guy to match it.

 

some turbos have o ring seals and others have metal and rubberseals on the pressure side

 

The turbo on my cummins 444 has oil leaking out of where it connects to the exhaust pipe. I don't want to hijack the thread but is that what you are seeing?

 

On a 444 you have to be careful they are notorious for having fuel slobber if idled and not covered in. You can get oil dye Cummins part # 3376891.
do the test as written on the bottle it is great stuff and will not hurt the oil.
Just a thought!

 

I'm not really picking up what you're putting down. What is fuel slobber? The engine mostly idles while I opperate the crane, the truck only gets driven once a month, maybe two. What do you mean by covered in?