N52 swap NEED HELP PLEASE

CJ///M128 · 09-30-2015, 01:01 PM

I have a 2009 128i with the n51 motor. Unfortunately my head cylinder had a Crack in it and it caused my motor to go out. Thankfully it is covered by my warranty. My question is if I wanted to replace my motor with the n52, is that possible. What is needed and has anyone done it?

m_thompson · 10-01-2015, 11:25 AM

You need the N51 engine to meet CARB emissions.

The Wind Breezes · 10-01-2015, 03:12 PM

Nitrous kit and a N51 making more power than a stock N54 / N55? Why not just throw one of those in while you're at it?

Suhb · 10-01-2015, 05:48 PM

This worries me. How does this happen?

The Wind Breezes · 10-01-2015, 07:32 PM

Quote:

Originally Posted by Suhb

This worries me. How does this happen?

Don't overheat your car, and don't add a bunch of power unless you're confident in the hardware and tune. Problem avoided. The heads are not not known to crack normally.

CJ///M128 · 10-02-2015, 12:50 AM

Quote:

Originally Posted by The Wind Breezes

Don't overheat your car, and don't add a bunch of power unless you're confident in the hardware and tune. Problem avoided. The heads are not not known to crack normally.

The nitrous has nothing to do with the head Crack. Car was tuned on Mustang dyno. I have barely even used the nitrous. I purchased the car stock and notices a head leak soon after. It went away so I thought nothing of it till coolant started to leak into cylinder 4. Guess it's bad luck. Either way I decided to just bore my motor and get custom pistons foraged and rebuild what I have.

Won't give me any real power gain but will make it a stronger and safer motor.

bmw1racer · 10-02-2015, 08:40 AM

Quote:

Originally Posted by m_thompson

You need the N51 engine to meet CARB emissions.

Not sure if that's really true: The 128i that I bought new here in SoCal has the N52 engine.

CJ///M128 · 10-02-2015, 10:44 AM

I actually ended up finding a really good deal on a n51 last night. Couldn't pass up the price especially cuz it only has 25,000 miles! Doing a straight swap no differences.

chris82 · 10-02-2015, 02:14 PM

Just go with the N51, it already has the DISA intake manifold, and AA can get some nice power out of that motor.

Taskmaster · 10-03-2015, 04:40 PM

It's less powerful...

09-30-2015, 01:01 PM	#1
CJ///M128 Private 13 Rep 80 Posts Drives: 128i Join Date: Apr 2015 Location: San Diego iTrader: (0)	N52 swap NEED HELP PLEASE I have a 2009 128i with the n51 motor. Unfortunately my head cylinder had a Crack in it and it caused my motor to go out. Thankfully it is covered by my warranty. My question is if I wanted to replace my motor with the n52, is that possible. What is needed and has anyone done it? __________________ 2009 128i \| MagnaFlow Exhaust \| Custom RPM Nitrous Kit w/ Tune \| 281whp 281wtq (dynoed) \| Bunch of Carbon Cosmetics
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10-01-2015, 11:25 AM	#2
m_thompson Major 133 Rep 1,416 Posts Drives: M-Sport 128i, 328xi, 3.0CS Join Date: Jun 2008 Location: New England, USA iTrader: (0) Garage List 2009 128i [0.00] 1972 3.0CS [10.00]	You need the N51 engine to meet CARB emissions. __________________ '09 128i - Black Sapphire Metallic\Coral Red\Glacier Silver\N51 DISA\6MT\Navigation\Premium\M-Sport\Heated seats\Xenon\Headlights\iPod\Smartphone\Euro Delivery
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10-01-2015, 03:12 PM	#3
The Wind Breezes Lieutenant Colonel 912 Rep 1,850 Posts Drives: 135i N55 DCT Join Date: Apr 2015 Location: USA iTrader: (0)	Nitrous kit and a N51 making more power than a stock N54 / N55? Why not just throw one of those in while you're at it?
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10-01-2015, 05:48 PM	#4
Suhb First Lieutenant 119 Rep 377 Posts Drives: 2010 128i Coupe 6-Speed Join Date: Dec 2012 Location: PA iTrader: (3)	This worries me. How does this happen?
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10-02-2015, 10:44 AM	#8
CJ///M128 Private 13 Rep 80 Posts Drives: 128i Join Date: Apr 2015 Location: San Diego iTrader: (0)	I actually ended up finding a really good deal on a n51 last night. Couldn't pass up the price especially cuz it only has 25,000 miles! Doing a straight swap no differences.
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10-02-2015, 02:14 PM	#9
chris82 Brigadier General 827 Rep 3,856 Posts Drives: 128i Join Date: Aug 2012 Location: NY NY iTrader: (8) Garage List 2009 BMW 128i [9.80]	Just go with the N51, it already has the DISA intake manifold, and AA can get some nice power out of that motor.
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10-03-2015, 04:40 PM	#10
Taskmaster Banned 2465 Rep 9,004 Posts Drives: M235i 6MT / E92 328 Msport 6MT Join Date: Nov 2013 Location: Florida iTrader: (6)	It's less powerful...
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