Post Reply 
 
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
BMW 335i N54 OIL LEAK
14-03-2019, 05:22 PM
Post: #1
BMW 335i N54 OIL LEAK
My car is leaking oil slightly but only when the car parked on a sloped area.
On a flat surface there is no leak of oil.
Recently replace the oil gasket housing. The leak is still there.


Any help will be much appreciated.
Thanks.
Find all posts by this user
Like Post Quote this message in a reply
14-03-2019, 05:34 PM
Post: #2
RE: BMW 335i N54 OIL LEAK
Perhaps the Valve cover gasket? Any oil around there?

Current:
'14 F30 335i MSport Alpine White III, Coral Red, Sat Nav, iDrive touch, PDC + reverse cam, Harman Kardon, N55 222.4wkw | 413wnm STOCK
'16 F30 318i LCI Manual, Alpine White III, Black Leather
[Image: banner final_1261154562_8282635603.png]
[Image: m_fanatic2_8387882621.jpg]
Mods: Optic Blue Lamin-X fogs, VPS light shields, CF Splitters, Mirrors, Ducktail spoiler, Aluminium interior trim upgrades...

Retired BMWs:
'12 F30 320d
'12 F20 118i
'09 E90 LCI 320i M-Sport
'07 E90 320i Excl
'91 E30 325iS Evo I
Find all posts by this user
Like Post Quote this message in a reply
14-03-2019, 07:50 PM
Post: #3
RE: BMW 335i N54 OIL LEAK
Remove your engine cover and check if there's oil around your spark plug area... That's a sign of a failed tappet cover gasket
Find all posts by this user
Like Post Quote this message in a reply
The following 1 user Likes boost3d's post:
Twinz
14-03-2019, 11:00 PM
Post: #4
RE: BMW 335i N54 OIL LEAK
Trace the leak by removing the engine cover and the bottom covers...lets hope its not leaking from the sump.

[Image: twinzsig_5365414051.jpg]
Visit this user's website Find all posts by this user
Like Post Quote this message in a reply
15-03-2019, 03:58 AM
Post: #5
RE: BMW 335i N54 OIL LEAK
I have an 325ci M54 engine doing the same only on downward slope. If facing uphill or flat -no leak. Been going on 3 years now and haven't really sorted cos i just park it facing up
Oil filter housing gasket changed - i thought this was the problem but no
Valve cover gasket is new
no leaks from anywhere above sump.
When i get time, I've decided i will replace the oil sump gasket cos I'm pretty sure that could be it given the mileage 174k kms

Also make sure it's not leaking from the gearbox cos that oil could drip down towards the oil sump and then you end up thinking its engine oil.
A leaking power steering hose(s) could also be misleading- dirty ATF is dark brown to black so check all those too so you're sure it's definitely engine oil.
Let us know when you find your leak as it might help me with mine
Find all posts by this user
Like Post Quote this message in a reply
The following 1 user Likes Beemerbro's post:
Twinz
15-03-2019, 05:51 AM
Post: #6
RE: BMW 335i N54 OIL LEAK
I have found that if there is a oil leak it is more prone to leaking from the engine cover when parked on a downhill slope, so this might also be the case.

Might also be the the front main seal but that would also leak while driving.

When I am face with something like this I always just remove as much covers I can, give the engine a good wash, let it dry, give it a drive and check for oil then, if you can not find the leak directly you at-least have a good indication of area to start searching.

Current Rides:
-2004 Ford Ranger 2500D
-2007 BMW 335i

-2015 KTM 1290 Superduke
-2008 Suzuki GSX650F

EX Rides:

- 1987 VW Citi Golf - RIP
- 1988 VW Fox
- 2009 NO Limit cg 125
- GoMoto Ballistic naked SI
- Suzuki DRZ400SM
- 2007 VW Polo 1.6 Comfortline
- 1991 MK2 Jetta CLI 20VT
- 2006 Audi A4 Avant S-Line
- 2013 Honda CBR1000RR - RIP
-2007 CBR 1000RR
-2007 Mazda 6 MPS
Find all posts by this user
Like Post Quote this message in a reply
The following 1 user Likes Echo03's post:
Twinz
27-03-2019, 09:41 PM
Post: #7
RE: BMW 335i N54 OIL LEAK
Thanks guys.
Update.

I did manage to get the car on a lift.
Removed engine cover and the bottom cover.
It leaking from the sump. I could see that oil were leaking through the bolts around the sump area.

What would be the sump gasket replacement cost with labour?
I know that it will labour intensive task.
Any recommendations to get it done around Durban area?
[Image: 20190323_092001_7152424659.jpg][Image: 20190323_092008_6769603700.jpg][Image: 20190323_092205_5446069170.jpg]
Find all posts by this user
Like Post Quote this message in a reply
27-03-2019, 09:59 PM
Post: #8
RE: BMW 335i N54 OIL LEAK
Sent you a PM

Current: F10 520D M Sport
Current: Audi A4 B8.5 1.8T
Ex: E92 325i M LCI
Ex: E90 323i Exclusive LCI
Ex: E90 320i Individual LCI

[Image: naman_5196753591_3577692508.png]
Find all posts by this user
Like Post Quote this message in a reply
28-03-2019, 08:45 AM
Post: #9
RE: BMW 335i N54 OIL LEAK
I replaced my sump gasket 2 years back. (N52)
Costed me 3.5k for the parts from BMW - gasket and new bolts.

Got my mechanic to do the labor. Its an intensive task!

I've walked the walk...
Now I talk the talk...
Find all posts by this user
Like Post Quote this message in a reply
The following 1 user Likes husaindindar's post:
Beemerbro
10-04-2019, 02:37 AM
Post: #10
RE: BMW 335i N54 OIL LEAK
(28-03-2019 08:45 AM)husaindindar Wrote:  I replaced my sump gasket 2 years back. (N52)
Costed me 3.5k for the parts from BMW - gasket and new bolts.

Got my mechanic to do the labor. Its an intensive task!

thanks for this- very usefulThumbs
Find all posts by this user
Like Post Quote this message in a reply
Post Reply 




User(s) browsing this thread:
1 Guest(s)

Return to TopReturn to Content