n54 blown motor

brian9237 · 09-16-2024, 05:16 PM

I have a 2009 335 e92 with a n54 motor problem. Going up to Mpact in pocono a few weeks ago and the motor stared to smoke so i pulled over on the turn pike in quakertown pa. The check engine lite came on with smoke under the hood. I had it towed back to a local shop were they
ran a compression test and found cylinder 5 had 50psi withe the rest good. They put a camera inside and saw the piston cracked across the top. Any idea what would cause this and who could recommend a place to fix it. The car only has 45k on the clock, and in excellent condition with no accidents. Thanks Brian

brian9237 · 09-17-2024, 03:00 PM

Any help in the pa or nj area to get the motor fixed.

iqraceworks · 09-17-2024, 03:01 PM

Unfortunately, your cheapest option is to find a nice used more and swap it. You aren't going to find anyone who will rebuild that motor (especially if there is damage to the cylinder wall) for less that a used engine is going to cost you.

ptpending · 09-18-2024, 03:16 AM

if you never upgraded the n54 injectors due recall, then their early version are prone to leak and one of them simpy burnt your piston
thats why any new n54 owner should check if his injectors upgraded by a recall or not

iqraceworks · 09-18-2024, 08:16 AM

Quote:

Originally Posted by ptpending

if you never upgraded the n54 injectors due recall, then their early version are prone to leak and one of them simpy burnt your piston
thats why any new n54 owner should check if his injectors upgraded by a recall or not

Index 12 injectors can leak, go lean, or have spray pattern and flow issues.....just like all the other index injectors.

lookalikehuuh · 09-20-2024, 01:10 AM

What oil were you using on the car? I wonder if it was LSPI, i assume you weren't hammering on the car when the piston cracked.

brian9237 · 09-20-2024, 05:41 AM

I use liqui moly and change every 5k. I was going to Mpact on the turn pk at 75 mph. I can't find anybody that would have a motor for it. Thanks for the reply.

whyzee125 · 10-03-2024, 08:59 AM

Car-part.com or eBay. N54 motors are plentiful

brian9237 · 10-03-2024, 09:03 PM

How come all the shops i went to don't trust any of these places to get a motor from. They don't want to install a motor they don't know history on. Plus the cost of labor to install. I think I'm going to try and sell the car, very disappointed in the car.

09-16-2024, 05:16 PM	#1
brian9237 New Member 4 Rep 26 Posts Drives: bmw128i Join Date: Jun 2021 Location: pa iTrader: (0)	n54 blown motor I have a 2009 335 e92 with a n54 motor problem. Going up to Mpact in pocono a few weeks ago and the motor stared to smoke so i pulled over on the turn pike in quakertown pa. The check engine lite came on with smoke under the hood. I had it towed back to a local shop were they ran a compression test and found cylinder 5 had 50psi withe the rest good. They put a camera inside and saw the piston cracked across the top. Any idea what would cause this and who could recommend a place to fix it. The car only has 45k on the clock, and in excellent condition with no accidents. Thanks Brian
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09-17-2024, 03:00 PM	#2
brian9237 New Member 4 Rep 26 Posts Drives: bmw128i Join Date: Jun 2021 Location: pa iTrader: (0)	help Any help in the pa or nj area to get the motor fixed.
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09-17-2024, 03:01 PM	#3
iqraceworks Brigadier General 2088 Rep 3,809 Posts Drives: 2007 335i Join Date: Aug 2019 Location: Missouri iTrader: (0)	Unfortunately, your cheapest option is to find a nice used more and swap it. You aren't going to find anyone who will rebuild that motor (especially if there is damage to the cylinder wall) for less that a used engine is going to cost you. __________________ 2007 335i, BMS DCI, BMS Chargepipe w/Tial BOV, ARM Catless Downpipes, silicone inlets, Bilstein B12 Prokit Suspension, Whiteline subframe bushings, Front/Rear M3 control arms, G-Plus FMIC, Stage 2 LPFP, Custom E40 tune by Justin (V8Bait), xHP stage 3 transmission flash, RB Two Turbos....10.90 @ 128mph
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09-18-2024, 03:16 AM	#4
ptpending Colonel 530 Rep 2,927 Posts Drives: e81 Join Date: Dec 2013 Location: Poland iTrader: (1)	if you never upgraded the n54 injectors due recall, then their early version are prone to leak and one of them simpy burnt your piston thats why any new n54 owner should check if his injectors upgraded by a recall or not __________________ E81 2007 130i 6cylinder Montego blue Retrofits: Harman Kardon, High-beam assistant, Removable tow hitch. Auto-dim folding exterior mirrors. Lumbar support. Perfomance Brakes.
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09-20-2024, 01:10 AM	#6
lookalikehuuh Lieutenant Colonel 997 Rep 1,513 Posts Drives: 2006 330i, 2007 335i Join Date: Sep 2014 Location: San Diego, CA iTrader: (0)	What oil were you using on the car? I wonder if it was LSPI, i assume you weren't hammering on the car when the piston cracked.
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09-20-2024, 05:41 AM	#7
brian9237 New Member 4 Rep 26 Posts Drives: bmw128i Join Date: Jun 2021 Location: pa iTrader: (0)	blown motor I use liqui moly and change every 5k. I was going to Mpact on the turn pk at 75 mph. I can't find anybody that would have a motor for it. Thanks for the reply.
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10-03-2024, 08:59 AM	#8
whyzee125 Brigadier General 1991 Rep 4,013 Posts Drives: Dinan stage 2 335i Join Date: Jul 2014 Location: Chattanooga Tn iTrader: (0)	Car-part.com or eBay. N54 motors are plentiful
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10-03-2024, 09:03 PM	#9
brian9237 New Member 4 Rep 26 Posts Drives: bmw128i Join Date: Jun 2021 Location: pa iTrader: (0)	blown n54 motor How come all the shops i went to don't trust any of these places to get a motor from. They don't want to install a motor they don't know history on. Plus the cost of labor to install. I think I'm going to try and sell the car, very disappointed in the car.
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