Problems with 6 Cylinder Petrols?

NoelWatson · 06-11-2011, 11:53 AM

Quote:

Originally Posted by Fox530

You can tell as there was a very slight power increase to 272bhp.

I am searching for the elusive N53 with 272bhp. My crock only has 250. Not sure whether worth taking up with BMW.

willhollin · 06-11-2011, 12:03 PM

Quote:

Originally Posted by NoelWatson

I am searching for the elusive N53 with 272bhp. My crock only has 250. Not sure whether worth taking up with BMW.

You had the car on a dyno?

NoelWatson · 06-11-2011, 01:17 PM

Quote:

Originally Posted by willhollin

You had the car on a dyno?

Yes

Fox530 · 06-12-2011, 02:33 PM

Crikey, and it only ran at 250bhp?

ASR1 · 06-12-2011, 07:38 PM

N52 330i coming up to 70k

No engine/fuel related issues whatsoever since new

NoelWatson · 06-13-2011, 03:54 AM

Quote:

Originally Posted by Fox530

Crikey, and it only ran at 250bhp?

Indeed. Seemed to misfire slightly at top end, and cats smelt. I'm thinking of upgrading to a Yugo Zastava

NoelWatson · 06-13-2011, 03:55 AM

Quote:

Originally Posted by ASR1

N52 330i coming up to 70k

No engine/fuel related issues whatsoever since new

Rolling road chap was saying the 130i usually gives 260-270. So not sure of upside to N53, as I reckon economy will deteriorate with performance. No doubt issue is coking of valves.

Dr G13 · 06-21-2011, 05:39 AM

My friends 2007 325i coupe has been at a local bmw dealer for the last 9 weeks due to the engine light coming on. They replaced coils, injectors, plugs and some other bits and they say its fixed now. Bit of a joke really.

NoelWatson · 06-24-2011, 04:44 PM

Getting ours back tomorrow. HPFP replaced again

I6Touring · 06-24-2011, 04:58 PM

Quote:

Originally Posted by Dr G13

My friends 2007 325i coupe has been at a local bmw dealer for the last 9 weeks due to the engine light coming on. They replaced coils, injectors, plugs and some other bits and they say its fixed now. Bit of a joke really.

How can that take 9 weeks, was there an issue getting the parts?

NoelWatson · 06-25-2011, 03:22 PM

Quote:

Originally Posted by NoelWatson

Getting ours back tomorrow. HPFP replaced again

I would estimate they car now has around 100bhp rather than ~270bhp. back it goes.

Alpina_B3_Lux · 06-27-2011, 12:20 PM

My 335i has/had three issues.

- HPFP kaputt, replaced at around 15.000 km
- power steering pump leaks oil, replaced at around 55.000 km
- car misfires and shakes currently, probably injectors that need replacement

All three defects are not uncommon, and the first and third are even typical for the N54 engine.

Alpina_B3_Lux

NoelWatson · 09-30-2011, 03:03 PM

Quote:

Originally Posted by Fox530

Crikey, and it only ran at 250bhp?

247bhp today.

Subzero2003 · 09-30-2011, 03:20 PM

Quote:

Originally Posted by NoelWatson

247bhp today.

Oh dear! :/

What are you going to do?

NoelWatson · 10-01-2011, 07:27 AM

Quote:

Originally Posted by Subzero2003

Oh dear! :/

What are you going to do?

It is going to go back in to dealership. They will plug it in, claim that nothing is wrong, then we can discuss my theory of carbon build up.

NoelWatson · 10-03-2011, 05:36 AM

Quote:

Originally Posted by Diseasel

There was a post not so long ago that showed every non turbo falling short of quoted power and every turbo engine coming in over power.

That said.. this thread is worrying.. all the best getting this sorted

Don't suppose you know where that thread was posted? Reason I ask is becuase rolling road chap reckon the N52 330 gave pretty much spot on quoted numbers

dopper99 · 10-03-2011, 06:01 PM

Think this is the link you want. I was looking over this the other day...http://www.e90post.com/forums/showthread.php?t=100276

NoelWatson · 10-04-2011, 03:42 AM

Quote:

Originally Posted by dopper99

Think this is the link you want. I was looking over this the other day...http://www.e90post.com/forums/showthread.php?t=100276

Many thanks

fulcrum · 10-04-2011, 07:16 AM

But the settings were not correct for the NA cars. You may have missed this bit.

Actually that's a good point we ran uncorrected for ALL the cars INCluding the NA ones.

So all the non Turbo cars, the 320 SI, 130i etc should ACTUALLY be getting slightly HIGHER figures.

NoelWatson · 10-04-2011, 07:42 AM

Quote:

Originally Posted by Diseasel

Hmm, im no expert on dynos but surely there should not be any trickery in "allowances" built into the numbers.

AFAIK the wheels should just be putting down the raw power to the dyno and that should be measured. @ the wheels.

When you start adding in crank losses and FI or NA losses or gains the results just become of less value.

My understanding is that the operator gets a raw at the wheels number. This is then adjusted for atmospheric conditions, and then that number is multiplied by a transmission loss factor.

For comparison, when my NSX was standard, I got 285bhp flywheel/233 at the wheels at SRR and 257 on TDI's hub mounted dyno.

NoelWatson · 11-01-2011, 02:31 PM

Quote:

Originally Posted by NoelWatson

It is going to go back in to dealership. They will plug it in, claim that nothing is wrong, then we can discuss my theory of carbon build up.

Went back in - they reckon the cats and exhaust are knackered and need replacing - no doubt due to the numerous misfires sending unburnt fuel their way.

moar · 11-01-2011, 03:16 PM

My 330i has been pretty bulletproof. I avoided the N53 and went for the N52, more reliable thats for sure and less time fannying about arguing at dealers.

Mechanically nothing has been replaced, did have random power losses which was sorted by resetting all the adaptions...

Other than that, N52 good reliability.

06-12-2011, 02:33 PM	#70
Fox530 Captain 70 Rep 622 Posts Drives: M340i xDrive Join Date: Sep 2010 Location: United Kingdom iTrader: (0)	Crikey, and it only ran at 250bhp?
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06-12-2011, 07:38 PM	#71
ASR1 Member 1 Rep 106 Posts Drives: 330i Join Date: Nov 2009 Location: London iTrader: (0)	N52 330i coming up to 70k No engine/fuel related issues whatsoever since new
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06-21-2011, 05:39 AM	#74
Dr G13 Lieutenant 34 Rep 445 Posts Drives: 3 Join Date: Feb 2010 Location: uk iTrader: (0)	My friends 2007 325i coupe has been at a local bmw dealer for the last 9 weeks due to the engine light coming on. They replaced coils, injectors, plugs and some other bits and they say its fixed now. Bit of a joke really.
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06-24-2011, 04:44 PM	#75
NoelWatson Private 0 Rep 83 Posts Drives: Rubbish Join Date: Jun 2011 Location: UK iTrader: (0)	Getting ours back tomorrow. HPFP replaced again
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06-27-2011, 12:20 PM	#78
Alpina_B3_Lux Colonel 264 Rep 2,563 Posts Drives: Audi R8 LMX, BMW M550i xDrive Join Date: Feb 2008 Location: Germany iTrader: (0) Garage List 2009 335i [8.90]	My 335i has/had three issues. - HPFP kaputt, replaced at around 15.000 km - power steering pump leaks oil, replaced at around 55.000 km - car misfires and shakes currently, probably injectors that need replacement All three defects are not uncommon, and the first and third are even typical for the N54 engine. Alpina_B3_Lux __________________ Audi R8 LMX, BMW M550i xDrive (G30 LCI); gone: Alpina B3 3,3 (E46), BMW 335i, Audi R8 V10 manual, Audi R8 V10, BMW M235i, BMW 550i F10
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10-03-2011, 06:01 PM	#83
dopper99 Lieutenant General 3534 Rep 11,323 Posts Drives: Golf R Mk8 Join Date: Jun 2011 Location: UK iTrader: (1)	Think this is the link you want. I was looking over this the other day...http://www.e90post.com/forums/showthread.php?t=100276
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10-04-2011, 07:16 AM	#85
fulcrum Lieutenant 10 Rep 463 Posts Drives: E92,F22, F36, G01 Join Date: Jun 2011 Location: London iTrader: (0)	But the settings were not correct for the NA cars. You may have missed this bit. Actually that's a good point we ran uncorrected for ALL the cars INCluding the NA ones. So all the non Turbo cars, the 320 SI, 130i etc should ACTUALLY be getting slightly HIGHER figures.
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11-01-2011, 03:16 PM	#88
moar First Lieutenant 14 Rep 391 Posts Drives: 330i Join Date: Sep 2011 Location: sheffield uk iTrader: (0)	My 330i has been pretty bulletproof. I avoided the N53 and went for the N52, more reliable thats for sure and less time fannying about arguing at dealers. Mechanically nothing has been replaced, did have random power losses which was sorted by resetting all the adaptions... Other than that, N52 good reliability. __________________ 2007 330i M Sport Saloon Le Mans Blue Active steering - Comfort Access - Bluetooth -TV - Heated Electric Memory Leather Seats - Auto - Logic 7 - Pro Nav - Adaptive Xenon Headlights BMW Assist - iPod integration - Swirl free .
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