How much oil leakage is tolerable in an engine?

If you have a non model specific technical question or some general MB related content, post it here!
Users are requested to Search through relevant topics using the "Search" function, before posting here.
Post Reply
RF62
C Class
Posts: 25
Joined: Wed 13 Dec, 2017 11:48 pm
Model you own: w204

How much oil leakage is tolerable in an engine?

Post by RF62 » Tue 19 Dec, 2017 5:48 pm

Hi!

I wanted to know how much oil leakage is OK in a car? At what point we say the engine is not in a good condition? Should there be wet oil on parts of the engine or blue /black smoke coming out of it to say an engine is not in a good condition?

For example, I recently got this photo from a C class (W204) engine in a stealership. It was strange that he didn't wash the engine as other dealers always do before putting a car on display. It had done around 100000 KMs. I thought to myself this is normal. But on the other hand, I've seen cars (same model) with the same mileage (and sometimes older than this car) with no signs of oil on them. So, would you say this is normal?
Image

User avatar
Tony From West Oz
OZBENZ moderator
Posts: 3222
Joined: Mon 20 Jun, 2005 9:04 pm
Model you own: w202
Location: Bedfordale WA

Re: How much oil leakage is tolerable in an engine?

Post by Tony From West Oz » Tue 19 Dec, 2017 8:25 pm

My opinion is that any oil visible should never "run" down the engine / body, in a way that could eventually end up on the road surface.
Life is a journey, with problems to solve, lessons to learn, but most of all, experiences to enjoy.

'83 W123 300D 325000km (Wife's car Josephine - sold).
'84 W123 300D replaced good OM617 912 with OM617 952 and enjoyed having good acceleration for the first time since first driving a 300D in 2002 - became engine and trans donor for 300CD Turbodiesel conversion. Now parted out.
'86 W124 300D sold (Wife's old car - sold )
'85 W123 300CD, 275 000km (Fatmobile) rebuilt turbodiesel from previous Fatmobile transplanted into 280CE (SOLD)
'99 W202 C250 Turbodiesel (my darling Wife's car - Sold)
'98 W202 C250 Turbodiesel (my car - Sold)
'06 Ssanyong Musso Crew Cab 2WD Ute (OM662 diesel and Auto Transmission)

User avatar
Christo C
Pagoda
Posts: 126
Joined: Fri 04 Jul, 2014 8:24 am
Model you own: w124
Location: Sydney [Beaconsfield]
Contact:

Re: How much oil leakage is tolerable in an engine?

Post by Christo C » Wed 20 Dec, 2017 6:44 am

Those examples in your photo look like insignificant minor weeps; as Tony said, oil running and/or dripping is a concern.
The occasional small puff of smoke from exhaust, e.g. when starting, is OK too, but not when it is continuous....
In NSW a car with drips of oil under engine or transmission will not pass Rego, and the EPA takes a dim view of smoke coming from exhaust for 10 seconds or longer.
Its all a matter of degree.
~Christo
1986 230E W124.023 M102.982 ~290,000km Thistle Green Saloon "Janis"

User avatar
Lance
Adenauer
Posts: 374
Joined: Thu 06 Mar, 2014 9:33 pm
Model you own: w114
Location: Altona Meadows, Melbourne

Re: How much oil leakage is tolerable in an engine?

Post by Lance » Wed 20 Dec, 2017 12:19 pm

Use it to bargain a lower price.
Regards,
Lance Smart

W114 280E 5 speed manual
W123 280E

User avatar
Mercmad
Mercedes Demigod
Posts: 8054
Joined: Sun 11 Sep, 2005 8:01 pm
Model you own: w109
Location: Brissy
Contact:

Re: How much oil leakage is tolerable in an engine?

Post by Mercmad » Wed 20 Dec, 2017 1:59 pm

Thats not a leak, more of an oily smear .

Post Reply

Return to “General Mercedes-Benz related.”