Just put an 2011 N51 engine in a 2009 N52 Bmw

Duji · 04-19-2022, 11:25 AM

Hello everyone,

I had a blown motor in my 2009 328i N52 and I had a 2011 N51 engine with low miles just sitting around so I decided to give the engine swap a try.

I have everything swapped over. I kept the same N52 ECU, Wire Harness, intake manifold, and esentric shaft sensor.

When I go to start I am getting high rpm and very rough running then engine shuts down.

From my research I believe I need to tune the new N51 engine to N52 compression?

Any information on this is appreciated!

mad1stgen · 04-23-2022, 10:21 PM

It's a direct swap. Check your vac connections and SAP port cover plate on the head.

Where in FL ?

04-19-2022, 11:25 AM	#1
Duji Registered 0 Rep 1 Posts Drives: 2009 328i Join Date: Apr 2022 Location: Florida iTrader: (0)	Just put an 2011 N51 engine in a 2009 N52 Bmw Hello everyone, I had a blown motor in my 2009 328i N52 and I had a 2011 N51 engine with low miles just sitting around so I decided to give the engine swap a try. I have everything swapped over. I kept the same N52 ECU, Wire Harness, intake manifold, and esentric shaft sensor. When I go to start I am getting high rpm and very rough running then engine shuts down. From my research I believe I need to tune the new N51 engine to N52 compression? Any information on this is appreciated!
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04-23-2022, 10:21 PM	#2
mad1stgen Master Wagon Builder 451 Rep 897 Posts Drives: 2015 F wagon S55/6MT Join Date: Apr 2014 Location: Metro Detroit/Tampa Bay iTrader: (57)	It's a direct swap. Check your vac connections and SAP port cover plate on the head. Where in FL ?
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