2Addicts | BMW 2-Series forum - N20 (228i) / B46 (230i) Engine, Transmission, Exhaust, Tuning https://www.2addicts.com/forums/ N20 and B46 tuning discussions en Thu, 30 Apr 2026 09:01:29 GMT vBulletin 60 https://www.2addicts.com/forums/images/misc/rss.jpg 2Addicts | BMW 2-Series forum - N20 (228i) / B46 (230i) Engine, Transmission, Exhaust, Tuning https://www.2addicts.com/forums/ Oil in coolant 228i xdrive 2016 https://www.2addicts.com/forums/showthread.php?t=2239439&goto=newpost Wed, 29 Apr 2026 20:27:35 GMT Hi all, I just got a 228i xdrive (122k miles) for my son; and car was very clean when I inspected it, no oil leaks, engine sounding pretty smooth. I did see the coolant bottle a bit dirty, but that is usual for 10 y.o. cars which have not seen many coolant changes. I dropped the coolant to... Hi all,

I just got a 228i xdrive (122k miles) for my son; and car was very clean when I inspected it, no oil leaks, engine sounding pretty smooth. I did see the coolant bottle a bit dirty, but that is usual for 10 y.o. cars which have not seen many coolant changes.

I dropped the coolant to change it, and to my surprise, there was a film of oil on it . The oil made the bottle dirty...

Oil is clean in the engine, no foam. Actually came out very clean, honey like.

My first thought was the oil cooler next to oil filter, so I opened that up and to my surprise it had a new gasket (new style gasket). It is possible that someone replaced it not long ago due to the oil/coolant mixing there.

Is there a possibility for the gearbox (auto transmission) oil to mix with coolant? Tee gearbox oil coolant is just a block of metal next to radiator, no seals in that one... can't see how that can get bad.

I might just bite the bullet and do a transmission oil change and see if it's clean. Car shifts well , no issues.

Any feedback welcome.
Thank you ]]> N20 (228i) / B46 (230i) Engine, Transmission, Exhaust, Tuning TheMechanic https://www.2addicts.com/forums/showthread.php?t=2239439 Timing chain 2016 228 ix https://www.2addicts.com/forums/showthread.php?t=2238594&goto=newpost Thu, 23 Apr 2026 01:11:09 GMT Question- bought a 2016 Bmw. 228 ix convertible w 41,000 mi- at a Kia dealer( was a trade in) - paid $18000 Started to hear a little rattle after 5 days- took to 2 BMW mechanics one said I needed a new timing chain -valves- oil leak, etc. quoted me $6400 second Bmw specialist said everything is... Question- bought a 2016 Bmw. 228 ix convertible w 41,000 mi- at a Kia dealer( was a trade in) - paid $18000
Started to hear a little rattle after 5 days- took to 2 BMW mechanics one said I needed a new timing chain -valves- oil leak, etc. quoted me $6400
second Bmw specialist said everything is fine-The chain was OK- no oil leaks -didn’t recommend anything; I went to the Kia dealer asked for them to pay for repairs )just in case those were actually)
needed. I didn’t get 3rd opinion yet) they offered me $2000 cash- or to have the Kia mechanics work on it.
What say you?
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]]> N20 (228i) / B46 (230i) Engine, Transmission, Exhaust, Tuning Idmoment https://www.2addicts.com/forums/showthread.php?t=2238594 2017 230i P1403 Engine Code https://www.2addicts.com/forums/showthread.php?t=2238407&goto=newpost Tue, 21 Apr 2026 22:05:43 GMT Uncovered the convertible after a long Northern Ohio winter, started it and seemed to be idling rough. No codes, drove terrible around the block. Then an error on the central display saying "drivetrain error". I have a DTC reader, plugged it in and now noticed the check engine light is flashing. The reader mentions P1400,(combustion misfire multiple cylinders),P1403( combustion misfire cylinder 3),P1204 (fuel system failure caused cylinder 4 misfire)
Am I correct in assuming its probably the number 3 cyl coil pack? Car only has 32k miles on it. And should I replace all 4, or just the failed one?
Don ]]> N20 (228i) / B46 (230i) Engine, Transmission, Exhaust, Tuning donkim https://www.2addicts.com/forums/showthread.php?t=2238407 B48 low load knock Bootmod3 https://www.2addicts.com/forums/showthread.php?t=2236278&goto=newpost Sun, 05 Apr 2026 19:39:41 GMT Hello guys, Does anyone got a idea why I have knock under low load and partial throttle with every map even the stock one? It doesnt knock when going WOT. Spark plugs, coils and oil is new. Im using 102 RON fuel on the 93 Oct multimap. https://bootmod3.net/log?id=69c5188badca5e5f2f31345e I... Hello guys,

Does anyone got a idea why I have knock under low load and partial throttle with every map even the stock one? It doesnt knock when going WOT. Spark plugs, coils and oil is new. Im using 102 RON fuel on the 93 Oct multimap.

https://bootmod3.net/log?id=69c5188badca5e5f2f31345e

I started noticing this after installing a aluminium intake and chargepipe.

F22 2017 B48B20A 220i

Could it be vibrations from the engine bay triggering the knock sensor? Ghost knock? Chatgpt suggests so.

And might this be the reason why the DME isn't targeting more than 350nm? As soon it reaches more than 350nm, it targets less nm. It happens in every log like this.

https://bootmod3.net/log?id=69c5188ad6fb6168dd5dd219

Its the 6 speed manual transmission, TCU torque limiter is off. ]]> N20 (228i) / B46 (230i) Engine, Transmission, Exhaust, Tuning Malubu https://www.2addicts.com/forums/showthread.php?t=2236278