Thread: N54 to N55 Swap
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      09-20-2021, 09:41 AM   #1
TheBlownE92
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Drives: 09 E92 335i XDrive
Join Date: Sep 2021
Location: Calgary, Alberta, Canada

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Question N54 to N55 Swap

Hello Fellow E9X owners.

Have any of you done a n54 to n55 swap. I bought my car for 1k with a supposedly seized engine. With little effort I got the car started but I now am hearing a knocking noise. I have already checked the power steering pump pulley and have ruled that out as a possible issue. The engine had lots of oil when I started that. If worst comes to worst, once I pull the motor and asses if I have thrown a rod. I will most likely swap in another motor as the price to refinish the head and buy a Piston and rod setup will cost almost the same price as a sub 100k kilometre n54 or n55. If anyone has done the swap. What was necessary. Whether it has a different ecu or motor mounts will all play an role in my decision.

Thanks for taking you time to read through this. Thanks
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