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Leaking oil from oil filter?

 
Old 02-10-2017, 09:51 PM
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Leaking oil from oil filter?

just changed the oil 2 weeks ago and noticed it's leaking from the top of the oil filter cap? Looks like it's sweating. I tightened it when I changed the filter but not sure what's going on? Anyone have this issue?
Filter was Mercedes oem.
here are some pics


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Old 02-11-2017, 02:57 PM
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2005 Mars Red C55 AMG, 2018 Mercedes C300 AMG Pkg WAGON (Wife's), 2018 GMC Denali 1500
filter housing leak? Need assistance

Looks like it's the filter housing. I haven't even driven the car since I changed the oil. All I've done is start it up and let the oil cycle with a couple of revs here and there.
Could it be those 2 gaskets on the piece that's connected to the housing?
Or could it be I didn't tighten the cap properly even though it was snug. Cap gasket?
im desperate guys.
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Old 02-11-2017, 04:00 PM
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Did you replace the o rings when you put the new filter in?
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Old 02-11-2017, 04:19 PM
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Yep I used a bosch oil filter that came with all the gaskets and I replaced them when I installed it.

i don't think this is serious but it's annoying.

is there a gasket in the housing cap where the filter goes?
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Old 02-11-2017, 04:22 PM
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Sometimes they get old and brittle and if they get over torqued they will Crack around where they seal. Get a new cap assembly.
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Old 02-12-2017, 05:17 AM
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Originally Posted by peppyhead View Post
just changed the oil 2 weeks ago and noticed it's leaking from the top of the oil filter cap? Looks like it's sweating. I tightened it when I changed the filter but not sure what's going on? Anyone have this issue?
Filter was Mercedes oem.
here are some pics


Looks like a serious looking puddle under the bumper Needs checking for sure.
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Old 02-12-2017, 06:34 AM
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W202 C43 1999
Are you sure its not coming from between the filter housing and the cooler?
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Old 02-12-2017, 11:58 AM
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05 c55 silver, 98 C43 5.4 Swap. Obs. black\black int
Pull it out and double check the o rings.

Never seen it leak from there.
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Old 02-12-2017, 12:02 PM
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Only the top o-ring should matter at all for leaks, but that wont put oil on the top, and it wont leak there with no oil pressure.
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Old 02-12-2017, 12:51 PM
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It's be top o ring gasket, as soon as there is pressure it spits that top gasket out and oil comes out the top.

mot the oil cooler thank god

mayne it's not tight enough? 25 nm pressure which is about 15lbs
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Old 02-12-2017, 01:13 PM
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Fixed it. Well if you can believe it wasn't tight enough.

i guess I'm not that strong.

It sealed now. Man these cars are finicky!
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Old 02-12-2017, 03:05 PM
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That's odd. If you have a proper o ring then it shouldn't leak even if it's just hand tight.
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Old 02-12-2017, 05:00 PM
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It must have been very light hand tight. Glad to hear that it's fixed
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Old 02-12-2017, 07:20 PM
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Originally Posted by peppyhead View Post
Fixed it. Well if you can believe it wasn't tight enough.

i guess I'm not that strong.

It sealed now. Man these cars are finicky!
Use a torque wrench with the big oil filter socket. Says 25nm on the top for a good reason
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Old 02-13-2017, 01:09 PM
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05 c55 silver, 98 C43 5.4 Swap. Obs. black\black int
I always tighten mine by hand its never leaked.


Have you double checked the top o ring anyway just to make sure?
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Old 02-13-2017, 01:12 PM
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So what happened was when I changed it a couple of weeks back I changed all three gaskets that come with the filter but I didn't see a gasket that was left on there from before. Funny I actually removed 3 so the previous owner actually had 4 on there and this one was preventing the cap from seating properly on the filter housing, thus leaking and spitting oil out everytime there was oil pressure.
And you're right, hand tight is all you need. EVerything is all good. I am just glad it wasn't the oil cooler or somthing a bit more serious.
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Old 02-13-2017, 04:57 PM
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Arrr, no, hand tight it NOT all you need, 25nm is what Mercedes Benz specify, and 25nm is what you need.

Just because it doesnt leak does not mean it is done up properly. Why even chance it?

It always makes me laugh when people ignore torque specs like they know better, and they always wonder why when they have un-explained issues.

If you blokes think youre smarter than the manufacturers, go right ahead
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Old 02-13-2017, 06:21 PM
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05 c55 silver, 98 C43 5.4 Swap. Obs. black\black int
If its plastic, I tighten by hand
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Old 02-13-2017, 07:00 PM
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Originally Posted by PJmak View Post
If its plastic, I tighten by hand
Hence why they put the 25nm torque spec on it
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Old 02-14-2017, 08:57 AM
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there is spezial tool for oil filter cap, it's shud be torqed with the tool, not with the hand you're using to **** with

Last edited by KJI3jflarryfe93; 02-14-2017 at 09:00 AM.
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Old 02-14-2017, 01:00 PM
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Old 02-14-2017, 07:13 PM
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Originally Posted by GatorMB View Post
What does he want that for? Nothing wrong with the one he has, just didnt assemble it correctly!
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Old 02-14-2017, 08:17 PM
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My first thought was a crack or cross thread.

Never hurts to be over cautious with aging service parts.

Cheers
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Old 02-14-2017, 10:50 PM
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Originally Posted by GatorMB View Post
My first thought was a crack or cross thread.

Never hurts to be over cautious with aging service parts.

Cheers
Well i tend to agree with that last bit there, ive replaced almost everything on my C43, and almost everything was fine before. It all lasted 18 years without issues, so it might go another 18 without another cent spent. If nothing else, ive got a pile of good spares sitting here if i need them
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