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LuZu LuZu is offline
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Unhappy Engine oil below minimum after less than 1k miles! - 04-21-2018, 12:42 AM

Hi,

So a short story of my 2008 BMW 335i. I bought the car and it was driving well for 3 months ( didn't really drive much ) then a warning came on ( Engine oil level below minimum ) so I immediately took it to a known shop and got an oil change for 130$. Weeks later engine started knocking and yeah it was a rod knock, so my first assumption was that previous owner put thick oil to silence the knocking. So I spent around 5.5k to get a used engine with 60k miles installed. Everything was great but then started hearing small knocking possibly a loud injector, the knocking is a bit loud on startup but then disappears while driving and sometimes won't hear anything. took it to shop they said noise not coming from Engine but its coming from injectors and might be fuel pump.

So today, after driving new engine for around 1k miles the Oil Below Minimum level warning appeared again. I went straight to Walmart and bought 1 quart of oil to add.


My question is, what could be the problem? Can it be leaking oil? and can it be related to previous engine issue? I love this beast but can't keep on changing engines!



Update: Dealership mechanic told me there is no oil leak and injector ticking noise is normal. However, I'm now 90% convinced that the turbos are leaking oil ( stock on 98k miles) since sometimes a big cloud of smoke comes out from the exhaust after I stop at a stop sign or lights. rarely happens but it does, and also I can smell the burned oil. however when driving no smoke comes out. any estimate on how long it might take before i HAVE TO replace the turbos if they were the cause?

Also, today got cylinder 2 misfire code once then disappeared, car started shaking for abit and stopped shaking when the Service Soon went off, I'm thinking it's the spark plug worn out from all the burning oil???

I'll do what dawhiz said and make someone disconnect exhaust to see if any leaks from turbos. any other thoughts and thing i need to do please let me know. I'm getting so close to losing my sh!t and letting the car go.

Last edited by LuZu; 04-29-2018 at 03:24 AM..
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ShocknAwe ShocknAwe is offline
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Default 04-21-2018, 04:15 AM

Definitely going to need more information.


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skirmozas skirmozas is offline
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Default 04-21-2018, 04:46 PM

Did you re-use the same turbos? Or some other engine parts? I mean n54 is an engine that is well known to withstand large amounts of beating, but most of the components used around it fall apart unless often replaced or modified. I mean, I don't think swapping engines is a good solution unless you have solid proof. I wouldn't make the call based on the sound of what I think something may be. The car makes a lot of noises, when I first started mine it sounded almost like a diesel because of injector tick.

So besides replacing the engine you can always look for oil leaks around common places which are widely discussed: valve cover gasket, a crack in valve cocer, oil filter housing gasket, oil pan gasket, pcv system or leaky turbos.

Good luck mate, becsuse if you actually had 2 out of 2 engines busted, you'd be really unlucky. If you feel the second problem is again engine related, I'd cover it and sell the car. Buy a different one, perhaps with a n55 engine which is even a better choice for applications up to 500whp and just close that page of one unlucky car, or otherwise you'll go broke and end up with a ****ty ride, which you don't wanna sell because you're going to loose a lot of money...

Sorry, I went off-topic, but i felt that all of this had to be said.
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LuZu LuZu is offline
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Default 04-22-2018, 04:39 AM

Quote:
Originally Posted by skirmozas
Did you re-use the same turbos? Or some other engine parts? I mean n54 is an engine that is well known to withstand large amounts of beating, but most of the components used around it fall apart unless often replaced or modified. I mean, I don't think swapping engines is a good solution unless you have solid proof. I wouldn't make the call based on the sound of what I think something may be. The car makes a lot of noises, when I first started mine it sounded almost like a diesel because of injector tick.

So besides replacing the engine you can always look for oil leaks around common places which are widely discussed: valve cover gasket, a crack in valve cocer, oil filter housing gasket, oil pan gasket, pcv system or leaky turbos.

Good luck mate, becsuse if you actually had 2 out of 2 engines busted, you'd be really unlucky. If you feel the second problem is again engine related, I'd cover it and sell the car. Buy a different one, perhaps with a n55 engine which is even a better choice for applications up to 500whp and just close that page of one unlucky car, or otherwise you'll go broke and end up with a ****ty ride, which you don't wanna sell because you're going to loose a lot of money...

Sorry, I went off-topic, but i felt that all of this had to be said.
Well yes turbos have not been replaced, new engine came as just the engine nothing else but the core engine. The guy that replaced the engine said he put new set of injectors and programmed them.

I dropped off my car today at the stealership for an airbag recall and get checked if any leaks. Once I told the guy that my BMW wanted 1 quart of oil after 1000miles of oil change he said it's normal and he had seen cars needing 2 quarts every 1000miles!! also he said which I already knew that these injectors are loud.
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LuZu LuZu is offline
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Default 04-22-2018, 04:45 AM

Quote:
Originally Posted by ShocknAwe
Definitely going to need more information.
I understand that it's hard to determine the exact cause of my engine oil loss or any other problem it has online but I thought of getting advice and possible causes from owners that went experienced similar problems
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dawhiz dawhiz is offline
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Default 04-23-2018, 10:33 AM

I was losing a lot of oil & it ended up being my turbo's. I'd have a little smoke here & there was losing half a quart to a quart in like 150 miles. It got worse when the front turbo really went & I'd lose a quart just driving around the block.

If they unconnect exhaust they can see if there's any oil coming out one side. Or if you remove some stuff you can feel if the front turbo has play. Mine moved in and out like a quarter inch.
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LuZu LuZu is offline
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Default 04-29-2018, 03:23 AM

Update: Dealership mechanic told me there is no oil leak and injector ticking noise is normal. However, I'm now 90% convinced that the turbos are leaking oil ( stock on 98k miles) since sometimes a big cloud of smoke comes out from the exhaust after I stop at a stop sign or lights. rarely happens but it does, and also I can smell the burned oil. however when driving no smoke comes out. any estimate on how long it might take before i HAVE TO replace the turbos if they were the cause?

Also, today got cylinder 2 misfire code once then disappeared, car started shaking for abit and stopped shaking when the Service Soon went off, I'm thinking it's the spark plug worn out from all the burning oil???

I'll do what dawhiz said and make someone disconnect exhaust to see if any leaks from turbos. any other thoughts and thing i need to do please let me know. I'm getting so close to losing my sh!t and letting the car go.



any
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08 335Ci 08 335Ci is offline
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Default 04-29-2018, 05:15 AM

The PCV valve is a known weak point on these engines and is the 1st place I'd look for oil loss. An Oil Catch Can is cheap insurance to keep oil out of the intake tract.

Oils are not created equally. Some guys like Royal Purple, others Liquid Moly. I prefer AMSOIL 0W-40 European Blend. When I go down 1 qt. it's time for a change.


No matter how fast I go there's always someone slower in front of me.

You can lead a horse to water but you can't make him Jet Ski.

'10 E92 335 M Sport, JB-4 G5 ISO, 3" CPE Charge pipe, WMI w/dual CM 5 nozzles, 3.5 Tmap, E85 BEF, Front Strut Brace, SS brake lines, Drilled and Slotted Rotors, Anti-lag, OCC. Escort Max 360

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wwwROLL TIDEwww wwwROLL TIDEwww is offline
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Default 04-29-2018, 06:19 AM

You may consider replacing the PCV valve.
I had similar symptoms of smoking exhaust and thought my turbo seals were bad.
I replaced my PCV figuring worst case I have a new PCV valve and still have to replace the turbos, but to my delight, smoking was resolved.


Chet (Kids name for my car) is a 2008 535i Sport+, JB4 G5 ISO, MHD BEF (pump), AFE Cold Air intake, VRSF CP, (genuine) VRSF D-P, Tial BOV, BMS OCC
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LuZu LuZu is offline
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Default 04-30-2018, 01:37 AM

I'll check with my local repair shop if they would replace PCV Valve for a reasonable price. If the price is too high will do it myself if I find time. Thanks for the recommendation and hopefully it'll be the solution
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