Hello all.
No updates on the engine that I blew early this year.
Still looking for a replacement 300 engine for cheap.
New problem however on my wife's 300.
When the engine is running and the dipstick raised, the oil gushes out at an alarming rate and opening the filler cap is a disaster also.
This has apparently been the case since sometime in the summer but it still seems to run fine.
Done some searching but it's hard to find a two or three word description for the problem to search with.
Anyone know what's happening ?
Thanks

Sounds like a really bad case of blowby, IE time for a rebuild.

Not at all what I wanted to hear though.
Can I get a second opinion ?
Couldn't it please be something simple like the EGR ?

Does this mean I'm looking for two engines now ?
They're not easy to find.

Perhaps you should check to see if the blowby vent on the top of the valve cover is blocked somehow, or if the hose assembly connected to it is blocked.

I think I'd pull the hose off at the valve cover first to make sure the engine was venting properly through that - normally you would think the vent is large enough to keep oil from surging out the dipstick tube.

If that eliminates the crankcase pressurization, you then would start checking for blockage in the vent tube and the oil separator.

Ken300D

I've heard about an oil separator. Does a '78 thru '80 300SD have a separator? How about an'87 300SDL? If any of these engines have the separator, where is it located? Should it be cleaned every so often so it doesn't plug up?

P E H

The oil separator on a 240D is mounted just in front of and below the aircleaner, I think it is bolted to the intake manifold. It is a 3" or so diameter pod about 5 inches long, with a hose connected from the valve cover to the inboard side, then a line going to the intake manifold, and a drain line going to oil pan. I believe it a like a cyclone separator, and it is supposed to take oil droplets out of the gas, collect and drain them to the sump while the gasses go in the intake and out the tailpipe. I have no idea if the other cars even have these things. Hope this helps, Jim

__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)

I have the oil seperator on my 81 30SD. I found that it needs periodic cleaning. Not hard to figure out that, with oil blowing in there and so forth. Over time it tends to get fouled.
Just remove the air cleaner assembly and wash everything with strong soapy cleaner. Then you can either pry open the trap itself and clear out the gunk. There are about three tabs on it that can be pried apart to open the small trap.
With that clear and the hose into it clear, a lot less goop gets all over the engine compartment.

Thanks Ken,
You got it.
The old vent had cracked and being a cheapskate I just grabbed some 5/8 hose and monkeyed it together.
Over time the hose had collapsed on itself and wasn't doing it's job.
After putting on the vent from the engine that I pulled out in the summer, everything is tickity boo.

Except of course, I'm now more aware of my blow by, which I guess I can live with. Perhaps if I adjust the valves on that one I might reduce it some.

So, thanks again to the best forum I've ever found.

Yer gonna have to explain that technical term "tickety boo"....

__________________
Palangi

2004 C240 Wagon 203.261 Baby Benz
2008 ML320 CDI Highway Cruiser
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg



TRUMP .......... WHITEHOUSE
HILLARY .........JAILHOUSE
BERNIE .......... NUTHOUSE
0BAMA .......... OUTHOUSE

Mouse,

Adjusting the valves will have absolutely no effect on blow by. Blowby is rings, pistons and cylinder wall leakage in the block. Valves out of proper clearance is leakage in the head. There is no relationship between the two.

P E H

Old Deis,

The oil separator is a new on to me. My '80 300SD has 245,000 miles and I never serviced the separator. I'm going to look for it and if I can find it, I'll see if it needs cleaning. Is there any mention of the oil separator as a maintenance item in any manuals?

Its amazing the things you learn here.

P E H

Definition . .
From the old Carpathian tongue.
Tickit (not ticket) is usually referring to an oxen's hindquarters and boo is a newer word regarding the exhalation of gas.
"e" is a conjunction.
Modern English has shortened this to "tickety boo"
The vehicle in question is now exhaling gas from the correct location.

Thanks P E H


"Adjusting the valves will have absolutely no effect on blow by. Valves out of proper clearance is leakage in the head. "

Perhaps at least part of my problem might be leakage in the head ?

Thanks for the explaination on "tickety boo" (from the Carpathian). I was familiar with "tia boo" (from the I-Kiribati) but never heard tickety boo before.

* FYI "Tia boo" (pronounced as sabo) is "goodbye" in I-Kiribati (Gilbertese) language.

__________________
Palangi

2004 C240 Wagon 203.261 Baby Benz
2008 ML320 CDI Highway Cruiser
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg



TRUMP .......... WHITEHOUSE
HILLARY .........JAILHOUSE
BERNIE .......... NUTHOUSE
0BAMA .......... OUTHOUSE