Been trying to solve this issue for awhile. I've got oil seeping out around the oil filler cap and making a mess of the front of the engine. I've replaced the car, replaced the rubber gasket and tried to bend the tabs to make it fit more snugly. Anyone else with this issue? Any fixes I haven't thought of?

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Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - totaled and parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 227,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 28,500 miles
'14 Smart electric cabriolet 28,500 miles
'15 Smart electric coupe 28,000 miles

have you checked the blowby breather system - if that is blocked you will have all sorts of leaks

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

Good suggestion. Where does that system run? Is it the rubber/plastic tube that runs along the passenger side of the head? If so, I just replaced the rubber elbow and had the long plastic tube off to do it and everything seemed okay and free flowing.

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Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - totaled and parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 227,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 28,500 miles
'14 Smart electric cabriolet 28,500 miles
'15 Smart electric coupe 28,000 miles

Hi Len,

I know you've had MB's for a few years, so you probably already know this, but don't leave the oil cap upside down when you take it off. The oil migrates around the gasket, and then leaks out and makes a mess when you put it back in place. I always have a rag ready to place the cap right-side up when I take it off.

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Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC

...are you running it on anything other than diesel? WVO has a tendency to gum up the rings and increase blowby in the 606.962 engine (but not so much in the non-turbo version)...

Thanks for the reply guys. Running diesel only. I do set the cap upside down often, but I also at least try to clean it up when I see it all oiled up. Have also removed the O-ring and cleaned everything up that way too - still the same seepage. I've got a highway run today. I'll try to get the cap all cleaned up before then and see what happens.

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Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - totaled and parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 227,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 28,500 miles
'14 Smart electric cabriolet 28,500 miles
'15 Smart electric coupe 28,000 miles

So that's the secret!

I always treat those gaskets as single use. Every time I remove the cap I thought that I had to replace the gasket because it would leak afterwards unless I used a new one.

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1974 240D "Boldie" 170K.- New timing chain/freshly rebuilt IP/replaced valve seals/injectors/upgraded stereo/new Bilsteins with Yokohamas/fresh paint and rocker panels plus lots of welds.

naw... the secret is to ALWAYS wash off the cap with Brake cleaner when you take it off... and dry out the fill area.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Look for a hair line crack in the aluminum. I have had two covers develop cracks over time.
Till I found the cracks I did everything to the cap you are doing now.

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1984 300SD turbo 126
"My true love"

God made me an atheist and who am I to question His wisdom

Did a 200 mile highway run yesterday. No mess yet, but I see a little bit of oil pooling up under the cap in the front. Looks like it's only a matter of time before it leaks a bit again. Have to look for a crack - thanks for the tip.

__________________
Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - totaled and parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 227,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 28,500 miles
'14 Smart electric cabriolet 28,500 miles
'15 Smart electric coupe 28,000 miles

Are you using the plastic cap or the metal cap? I had a plastic cap and it would seep some oil.

I haven`t had any problems with the metal cap. X2 by placing it on a rag, right side up. I give it a twist or two on the rag to wipe off the oil, then wipe off the oil around the VC opening.

Never hear of replacing the oil cap gasket every time it is removed.
always something new.

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Both of my caps are plastic I beleive including the original one.

__________________
Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - totaled and parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 227,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 28,500 miles
'14 Smart electric cabriolet 28,500 miles
'15 Smart electric coupe 28,000 miles

You're a genious!

I did exactly this and no leaks after a 100 mile trip.

Kudos!

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1974 240D "Boldie" 170K.- New timing chain/freshly rebuilt IP/replaced valve seals/injectors/upgraded stereo/new Bilsteins with Yokohamas/fresh paint and rocker panels plus lots of welds.