|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
Losing oil every 200-300km (N46)
|
|
03-31-2022, 11:31 AM | #1 |
New Member
3
Rep 13
Posts |
Losing oil every 200-300km (N46)
Hi guys
I would like some suggestions on what could be some "common" problems regarding this issue with my car... I have a E93 (320i), N46B20B engine; and the car is asking for +1L of oil every 200-300km I have checked under the engine to see if there is some oil leak, but its always dry, no blue or white smoke coming from the exhaust either... I recently flushed the steering fluid and topped it up with CHF11S, i had to remove a large plastic cover under the car, no oil leak either.. The car is currently using FUCHS Titan GT1 Pro Flex 5W-30 oil. Any advise is greatly welcomed Thanks |
03-31-2022, 01:13 PM | #2 |
Captain
289
Rep 654
Posts |
Worn valve stem seals are a very common cause of excess oil consumption with the N46 engine. Try this test. Get the engine up to operating temperature, leave it idling for 10 mins, then rev the engine up to 4000rpm and see if there is any smoke from the tailpipe.
|
Appreciate
3
|
04-01-2022, 03:50 PM | #3 |
New Member
3
Rep 13
Posts |
Thanks for answering @EvaBmw, i drove the car for a while until i got it to operating temp, rev'd it up to 4-5k rpm, and there was no sign of any type of smoke coming out from the tailpipe....so i'm assuming the valve stem seals are not the problem? Please correct me if i'm wrong
|
Appreciate
0
|
04-01-2022, 04:07 PM | #4 | |
Major General
2775
Rep 6,378
Posts |
Quote:
|
|
Appreciate
0
|
04-01-2022, 04:17 PM | #5 |
New Member
3
Rep 13
Posts |
|
Appreciate
0
|
04-01-2022, 05:08 PM | #8 |
Major General
2775
Rep 6,378
Posts |
|
Appreciate
0
|
04-02-2022, 12:47 PM | #9 |
Captain
289
Rep 654
Posts |
The other possibility is a faulty oil level sensor. The only way to confirm that though is draining and measuring the engine oil.
The correct amount for the n46 is 4.25 litres. Last edited by F31B48; 04-02-2022 at 01:16 PM.. |
Appreciate
0
|
04-02-2022, 12:54 PM | #10 |
Lieutenant Colonel
1095
Rep 1,695
Posts |
How do the spark plugs look? With that much oil consumption, the plugs should show some oil coating too (wet black look) I would think. And agreed, the exhaust should show some signs of oil coating too?
How about the valve cover area, is oil seeping out on top of the engine anywhere? Oil filler cap maybe? |
Appreciate
0
|
04-02-2022, 02:09 PM | #11 | |
New Member
3
Rep 13
Posts |
Quote:
|
|
Appreciate
0
|
04-02-2022, 07:36 PM | #12 |
Major General
2775
Rep 6,378
Posts |
Oh yeah there it is. If you take whiff does it smell like burned oil?
|
Appreciate
0
|
04-02-2022, 07:45 PM | #13 |
New Member
3
Rep 13
Posts |
|
Appreciate
0
|
04-04-2022, 10:44 AM | #15 | |
New Member
3
Rep 13
Posts |
Quote:
Here is a video i made to test it: pcv test I suppose that the rattling sound when it is lifted means that the valve is failing? |
|
Appreciate
0
|
Yesterday, 08:55 AM | #17 |
Major
424
Rep 1,111
Posts |
First, you're burning oil and not leaking oil.
Second, if the car has a catalytic converter, it will burn most of the oil and you won't see the smoke. Third, do as suggested above and drain the oil when gauge says you're one qt low. Cheap test. Fourth, search Google on, my N46 burns 1 qt every 200 km. |
Appreciate
0
|
Yesterday, 01:12 PM | #18 | |
New Member
3
Rep 13
Posts |
Quote:
The problem was the worn valve stem seals as suggested by the other members, I watched some youtube videos and did the job myself, it took me 2 days as it was my first time doing this kind of work on an engine. Since doing the job in July 2022 the car has no longer asked for oil as it did before. As suggested by F31B48, a quick test to see if it is burning oil is to leave the engine idling at operating temperature for 10 minutes, then rev it, if it is burning oil it should happen the same as in the video I posted above. Greetings |
|
Appreciate
1
StradaRedlands6160.00 |
Bookmarks |
|
|