While changing front shocks yesterday I've noticed that there is some oils outside and underneath the EGR valve... FYI - I've put a small bb in the vacuum fitting that goes to the top it it some time ago.

Is this an indication of some problem with exhaust valves not sealing properly?! Valves were adjusted about 8K miles back.

James

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1987 Mercedes 300SDL; SOLD
1985 Mercedes 300D; SOLD
2006 Honda Pilot - wife's ride; 122K;
1995 Toyota Land Cruiser - 3X locked; 182K

Unlikely, probably just oil from the turbo getting blown into the intake, becoming a liquid when the engine cools down, and leaking out the low point. Take the EGR valve off and replace the metal gasket, make sure all of the surfaces are clean. It should not be necessary to use any sealer but I suppose you could do that too. If the valve guide seals were leaking significantly, you would be getting blue smoke upon acceleration, especially after long periods of idling.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Does it sound like the turbo seal replacement is in order soon?! How difficult is that job to do?!

__________________
1987 Mercedes 300SDL; SOLD
1985 Mercedes 300D; SOLD
2006 Honda Pilot - wife's ride; 122K;
1995 Toyota Land Cruiser - 3X locked; 182K

You will know if any of the valve seals are shot when you have carbon caked on them. A way to check without removing the head is to remove the intake and exhaust manifolds and sine a light in the holes

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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)

How difficult of a job is that to do?! Also guessing that the bolts may be seized pretty good from all the heat...

__________________
1987 Mercedes 300SDL; SOLD
1985 Mercedes 300D; SOLD
2006 Honda Pilot - wife's ride; 122K;
1995 Toyota Land Cruiser - 3X locked; 182K

actually I havent had any break or have any trouble with anyone of them. you might have to remove the turbo to remove the exhaust manifold. remove all the necessary bolts

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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)

Sounds like quite a project...

__________________
1987 Mercedes 300SDL; SOLD
1985 Mercedes 300D; SOLD
2006 Honda Pilot - wife's ride; 122K;
1995 Toyota Land Cruiser - 3X locked; 182K