turbo oil drain question - Page 2 - PeachParts Mercedes-Benz Forum

KCampbell · #16 01-18-2005, 10:55 PM

I figured it was under pressure, but even so....

Isn't it essentially squirting straight down into the oil pan? I guess it must be splashing up from the bottom of the oil pan and seepng out.

Kevin

Pete Burton · #17 01-18-2005, 11:50 PM

Quote:

Originally Posted by KCampbell

Why does this thing leak in the first place?

I was looking at mine just now, the leak seems to be getting worse. It looks like the tube exits the turbo then slips inside the lower tube. The lower tube goes into the top of the oil pan with a seal around it's point of entry.

Looks like gravity would be in favor of just encouraging all that oil to keep moving down into the pan. How does it manage to find it's way out around the seal where the pipe enters the oil pan? I would imagine that pipe has its end below the top of the oil pan, and I just can't figure why the damn thing leaks!

Kevin

blow-by helps the oil get out. all engines have it, and many nice running diesels have quite a bit.
A higher crankcase pressure really retards the effect of gravity bringing that oil down.
The oil tries to get to the lowest pressure, and that's out the tubes.

Years of bathing in hot oil make the o-rings lose their compression and the grommet can get hard as a brick.
Add enough vibration to shame an air hammer and it's not surprising they leak, especially after 20 years.
Not that I think the design meets the usual MB standard - but I think they looked at it next to the air cleaner bracket and accepted it

The Gears · #18 08-19-2013, 02:24 AM

Don't pull the pan. Don't remove the upper tube from the turbo charger.
Do push the lower tube down through the seal into the pan till it clears the upper tube.
Now by what ever means you can pry the seal up out of the pan and up the tube. With the seal removed the tube can rattle around in the hole and will just clear the bottom of the upper tube. Two gear clamps on the lower tube for a good grip. A crows foot on a long extension to pound the lower tube down into the pan a couple of inches then again to drive the lower tube up into the upper tube to set the 'O' ring in new the seal. ON an 126 a 1/2 hour. On a 300 1/2 a day.