Oil leak through an oil cap
#1
New Members
Thread Starter
Join Date: Jun 2016
Location: Namibia
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 523i model 2006
Oil leak through an oil cap
I am currently having a huge oil leak problem, my car drives only 200km and it needs an oil top up. One mechanic indicated to me it was burning and he changed the valve stem cells but the problem still continued. After a careful inspection I noticed it was leaking through the cap, I have replaced the cap twice but no solution. I can literally see th
oil accumulated between the coils? Any suggestions could this mean the valve cover needs replacement!
oil accumulated between the coils? Any suggestions could this mean the valve cover needs replacement!
#2
New Members
Join Date: Dec 2018
Location: Michigan, USA
Posts: 133
Likes: 0
Received 5 Likes
on
5 Posts
My Ride: 2009 528i xdrive
I assume that the new cap came with a gasket?
Could be a valve cover gasket. Could be valvetronic gasket. Just bought a complete set from fcpeuro for $55 (give or take)
Could be a valve cover gasket. Could be valvetronic gasket. Just bought a complete set from fcpeuro for $55 (give or take)
#3
New Members
If it's in the spark plug holes my guess would be valve cover gasket. I would assume your mechanic would have replaced that when he did the valve stem seals though.
#4
New Members
Thread Starter
Join Date: Jun 2016
Location: Namibia
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 523i model 2006
#5
New Members
Thread Starter
Join Date: Jun 2016
Location: Namibia
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 523i model 2006
Yes the valve cover gasket was replaced when the stem seals were done. The oil actually accumulates outside the spark plug holes. If I drive a long distance and remove the engine Plastic cover, I can clearly see the trail of oil coming from the oil cap dripping into spark plugs outside holes. I usually take a cloth to remove the oil.
Last edited by mungu; 01-08-2019 at 11:42 AM.
#6
New Members
Join Date: Mar 2016
Location: Montreal
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2008 e61 xi m-package
Model Year: 2008
I feel for you as I have the same issue, I have excessive oil when the car is going slow and the engine is burning oil(valve stem seals-to be done), the car also accumulates oil around oil cap and between the spark plug holes, I also have oil seeping from the oil coolant pipes again. So lots of work still to be done and will be following your post very closely as I hate having this oil issue! I will be doing the stem seals, the valve cover gasket, the oil cap seal and the whole oil cooling hoses. I will then sacrifice a living thing to the BMW gods to try and appease their anger.
#7
New Members
Others please chime in to see if this makes sense or not. What if there was a problem in the PCV and it was plugged? Would pressure in the head then push oily vapor out the oil cap? Reason I suggest this is that the other day I was trying to find a boost leak so I pressurized my air inlets with just a couple of psi of air to listen for leaks and I hadn't blocked off the PCV. All of a sudden I got lots of air coming out the oil cap and it made a bit of a mess on the engine cover. Looks like that cap wasn't really designed to hold any pressure as my gauge was showing about 1-2 psi.
#8
New Members
Thread Starter
Join Date: Jun 2016
Location: Namibia
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 523i model 2006
I feel for you as I have the same issue, I have excessive oil when the car is going slow and the engine is burning oil(valve stem seals-to be done), the car also accumulates oil around oil cap and between the spark plug holes, I also have oil seeping from the oil coolant pipes again. So lots of work still to be done and will be following your post very closely as I hate having this oil issue! I will be doing the stem seals, the valve cover gasket, the oil cap seal and the whole oil cooling hoses. I will then sacrifice a living thing to the BMW gods to try and appease their anger.
#9
New Members
Thread Starter
Join Date: Jun 2016
Location: Namibia
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 523i model 2006
Others please chime in to see if this makes sense or not. What if there was a problem in the PCV and it was plugged? Would pressure in the head then push oily vapor out the oil cap? Reason I suggest this is that the other day I was trying to find a boost leak so I pressurized my air inlets with just a couple of psi of air to listen for leaks and I hadn't blocked off the PCV. All of a sudden I got lots of air coming out the oil cap and it made a bit of a mess on the engine cover. Looks like that cap wasn't really designed to hold any pressure as my gauge was showing about 1-2 psi.
#10
New Members
Join Date: Dec 2018
Location: Melbourne Beach FL
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2005 530i
Model Year: 05
Engine: m54
Actually the CCV is exactly what I was going to suggest. What happens if you remove the oil filler cap with engine running? If I do that to any of my 3.0's the engine reacts as if it has a vacuum leak. The CCV system is a closed system so therefore when cap is removed you are creating a vacuum leak. If I put my hand over the open cap hole I feel suction. I believe a misfunctioning CCV valve or system will push oil instead of oil vapor.
Tom
Tom
Thread
Thread Starter
Forum
Replies
Last Post
DC5Series
E60 Discussion
12
07-10-2022 10:54 AM
DC5Series
E39 Discussion
2
04-24-2014 04:20 PM
peter530d
E60 Discussion
0
01-31-2008 12:32 PM