Possible to swap M2 N55 into F21 M135i???

ealaniz · 03-14-2023, 08:55 AM

Hello,

I had the catastrophic oil starvation issue on my 2012 M135i so i'm looking for a rebuild. There might be possibility for getting an low mileage M2 N55 complete engine for similar price of a rebuild so I am considering the swap. I imagine will need the ECU / harness, downpipe might be different... But otherwise, might anyone have more information if there might be additional components that would hinder this idea? For example not sure if there is some additional oil cooling...

Another issue for considering this is that it seems this problem with engines siezing is due to the stock oil pumps, so a solution is to add the components from S55 engine. However that involves adding 2 oil pumps and changing oil pan, so this adds a significant amount to the rebuild of an N55...

F20_M135i · 03-16-2023, 11:45 PM

There will also be a lot of electronic problems to be expected, this is not recommended.

ealaniz · 03-20-2023, 04:13 PM

thanks for the reply.... please, Expand!

03-14-2023, 08:55 AM	#1
ealaniz New Member 0 Rep 5 Posts Drives: 2012 BMW M135i Join Date: Mar 2023 Location: Switzerland iTrader: (0)	Possible to swap M2 N55 into F21 M135i??? Hello, I had the catastrophic oil starvation issue on my 2012 M135i so i'm looking for a rebuild. There might be possibility for getting an low mileage M2 N55 complete engine for similar price of a rebuild so I am considering the swap. I imagine will need the ECU / harness, downpipe might be different... But otherwise, might anyone have more information if there might be additional components that would hinder this idea? For example not sure if there is some additional oil cooling... Another issue for considering this is that it seems this problem with engines siezing is due to the stock oil pumps, so a solution is to add the components from S55 engine. However that involves adding 2 oil pumps and changing oil pan, so this adds a significant amount to the rebuild of an N55...
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03-16-2023, 11:45 PM	#2
F20_M135i Lieutenant 101 Rep 551 Posts Drives: BMW F20 M140i Xdrive Join Date: Mar 2020 Location: FRANCE iTrader: (0)	There will also be a lot of electronic problems to be expected, this is not recommended.
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03-20-2023, 04:13 PM	#3
ealaniz New Member 0 Rep 5 Posts Drives: 2012 BMW M135i Join Date: Mar 2023 Location: Switzerland iTrader: (0)	thanks for the reply.... please, Expand!
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