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danarj
10-06-2014, 01:48 PM
Hello
I have bmw e34 525i 1991 and I have changed head gasket, valve head gasket and piston rings but my car still consume oil http://images.bimmerforums.com/images/icons/icon9.png what could be wrong with the engine
Tre0Tre34
10-06-2014, 03:15 PM
Could be a few things.

If the cylinder bores are scored or excessively worn it really wouldn't matter if you have new rings.

Did you do anything to refresh the head while it was off? Valve guides could be leaking oil into the combustion chamber.

How much oil are you burning?
S61Dan
10-06-2014, 08:20 PM
I am assuming you ruled out a hidden oil leak?
danarj
10-08-2014, 02:30 AM
Could be a few things.

If the cylinder bores are scored or excessively worn it really wouldn't matter if you have new rings.

Did you do anything to refresh the head while it was off? Valve guides could be leaking oil into the combustion chamber.

How much oil are you burning?

it is burning around one quarter from one oil change to another.
BMW IDFR
10-08-2014, 03:00 PM
it is burning around one quarter from one oil change to another.
I heard that was normal, but on the other hand, mine only burns 200ml maximum between oil changes
Tre0Tre34
10-08-2014, 07:42 PM
One quart between changes is not terrible (unless you are changing your oil every couple weeks). Mine burns a quart about every 3-4k miles, but I also have 296k miles on the clock and feel like I'm willing to deal with that.

Do you blow smoke out of your exhaust or have any running issues with the motor? How many miles are on this thing, and what oil weight do you use?

Oh yeah, m20 or m50 motor?
Kinghorn
10-09-2014, 12:45 PM
Came in here thinking "Welcome to the Club" lol.
My 530i does, and so does my brothers m50 525i.
danarj
12-03-2014, 06:35 AM
No I didn't check for the head it burns 1 litre around when I reach 1300 KM.
DKJimmy
12-03-2014, 08:02 AM
I think we would better be able to help you out if we knew which engine your car has in it. If it is an 89 or a 90, it'll have an m20 motor, if it is anything newer, it'll have an m50 motor in it.

My car burns about a quart every 600-700 miles, but I'm certain it's due to my super heavy foot and the fact that all the internal engine seals have 300k miles of wear on them.
zubbie
12-03-2014, 08:12 AM
My M30 doesn't burn any oil.

Mind you it leaks about a quart every few hundred miles.......