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Old 09-12-2005, 11:15 PM
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Oil leak. Problem?

What's the issue with MB diesels dripping oil? I'm looking for a 300SDL and this one looks good, but has a oil leak.

Are oil leaks common and should it be a concern? Are they an easy fix?

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Old 09-13-2005, 03:05 AM
300SDog's Avatar
gimme a low-tech 240D
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Location: central ky
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For really picky owners MB even produced an 'oil leak diaper' absorbant pad that can be draped underneath the engine. Diesels always push a little oil and the pans are never completely dry, but its negligible. Probably a question of high crankcase pressure. But ask the seller exactly how much oil the engine leaks, could be just an occasional drop on the garage floor.... no problem.
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Old 09-13-2005, 06:19 PM
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Location: Bay Area No Calif.
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Originally Posted by mrdane
What's the issue with MB diesels dripping oil? I'm looking for a 300SDL and this one looks good, but has a oil leak.

Are oil leaks common and should it be a concern? Are they an easy fix?
Not all diesels leak oil. that is its not common on NEW diesels.
Many of the ones that do leak are well into the 200,000 mile range and have had no seals or hoses replaced.
You may have to spend something in excess of $1000 to fix all the leaks. Why so high you say? Well, if the rear crankshaft seal is leaking you have to pull the engine, you may as well replace the front seal and the oil pan gasket(s) while you at it.
'00 E320 (wifes car), '95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!
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Old 09-13-2005, 06:40 PM
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Location: Utah
Posts: 414
had a real bad pan leak on a 240D I sold to a friend... turned out to be just a 25 cnet fix.. just needed a new compression washer on the frain plug..

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Old 09-13-2005, 09:16 PM
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manic mechanic
Join Date: Jun 2004
Location: cincinnati
Posts: 377
an awful lot of money

Up to $3800 and rising-it's a nice looking one, but with the even the problems listed(dead central locking system, moonroof alignment, power antenna problems) I'd be skeptical-also beware the super low brand new feedback rating-a sure sign of a true used car salesman!!!
1982 300DT 190K (Diesel Purge + synthetic oil=smoothness at last!!!)
2004 Ford E-350 6.0 L PSD 227K
2006 Dodge Ram 3500 SRW HO Cummins 4X4 48RE 42K (brute force tow vehicle)
2005 Scion xB wife's rolling pop can
1993 GMC Sierra C3500 6.2 142K
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Old 04-09-2010, 09:46 AM
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Location: eastlake, ohio
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Exclamation 1983 dt 300

is it common to have a puddy of oil everywhere i park? has 250,000 on the motor, checked everwhere, need some ideals where to look at? new owner of a really nice DT 300 1984!!!!
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Old 04-09-2010, 10:02 AM
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Its always nice to have a bone dry outside on your motor.

I spill more oil when I change it or top up than the motor leaks.

If its leaving a puddle over night its time to fix the leak. Normally just the sump plug.

They leak a lot less than most Jags.

If there are no leaks at 250k miles, chances are the motor has been out & so every seal replaced.
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1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
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Old 04-09-2010, 11:13 AM
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turbo drainback "o-ring" such a pain on older motors.

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