BMW-Driver.net Forums banner
1 - 20 of 31 Posts

·
Registered
Joined
·
286 Posts
Have been reading up on different forums about N47 engine failures. Now that BMWs with this diesel engine are being traded privately without a warranty I want to be in a position to advise some friends precisely from what start build date to what end build date to steer clear of.

My current research suggests the following:
  1. The N47 engine started to be used around Feb/March 2007 but the M47 engine continued to be fitted in some cars until Feb 2008.
  2. The problem with timing chain failure was solved on N47 engines fitted to cars with a build date after April/May 2010.
  3. From April/May 2010 up until April 2011 slight noise issues with timing chain persisted on the N47 engine that can be solved with chain guides.
I welcome any corrections to the above information.

I simply want to be able to pump the last 7 digits of the chassis number into realoem.com, find the build date and be able to say to any friend of mine buying a BMW diesel with any derivative of the N47 engine whether to steer clear or not.
 

·
Registered
Joined
·
2 Posts
Help Required

I just posted the following in another thread and then saw this one. Apologies for duplication......

I have a 520d with full service history and local dealer has confirmed it has the timing chain problem. The repair cost is in the region of €5K. BMW will not provide any subsidy towards this repair. This issue has been reported by hundreds if not thousands of BMW owners and there is no sign of BMW acknowledging they have a problem. It's only a matter of time before someone dies as a result of a chain failure whilst driving.

Given the amount of money I paid for this car, I deserve a better product and a better service from BMW. I haven't slept for weeks thinking about how I am going to pay for this repair. I'm sure there are alot of people out there in the same position as me and I ask you to make as much noise as you can and raise awareness. Facebook / Twitter / BMW forums / Local politicians / Regulatory bodies / Consumer Affairs

I would like to hear from other BMW owners with this problem and get some suggestions together on how we can tackle BMW. They should not be allowed to get away with this. Please PM me.
 

·
Registered
Joined
·
2,140 Posts
Just to gather a bit of relevant info:

  • What year is the car?
  • What mileage?
  • Is the service history with a BMW main dealer?
  • What did the dealer say about the problem?
  • Have BMW Ireland inspected the car?
  • Have they given a reason why they will not offer a goodwill gesture?
 
  • Helpful
Reactions: AdminC

·
Registered
Joined
·
286 Posts
N47 Engine Problems

Quote:
I'm just posting this link here as a lot of people have emailed me about this. I don't know if it's the right forum section so move it if mods see fit to do so.

Basically the N47 type engine as fitted to 120d/320d/520d has turned into a ticking time bomb. This has become more apparent over the past couple of months.

I now firmly believe that they should be dealt with as a preventative measure if there is any hint of 'excessive' noise from the timing chain area.

Note that the chains on these is at the gearbox side unlike older M47N/M57T2 engines. To do this work requires removal of the engine.

I'm posting a link to another forum as I just can't type it all out again on an iPhone...

It should be noted that BMW themselves are basically admitting (albeit internally,) that there is a major problem... I wouldn't bank on any recall though, it would cost too much.

Kind Regards,
Eddie.
www.bmwcare.com

Many thanks to Eddie for the info above and below.

Quote:
The Service Measure covers:
'N47, N47S, N47T, slipping noises in the engine, timing chain scraping'

From:
'01/03/07 - 01/03/11'

Cause:
'Sharp edges on the chain wheels or the timing chain does not run evenly over the sliding rails'

There are two distinct methods of dealing with the problem depending on build date.

N47, N47DK0, N47S, production period 01.03.2007 to 05.01.2009:
Renew:
  • 11 21 7 803 479 Exchange crankshaft with bearing shells [Crank must be manufactured after 05/01/2009] >> this suggests that all cranks prior to that build have questionable sprockets??
  • 11 41 7 797 896 Chain for the oil pump drive.
  • 11 31 8 506 652 Bottom timing chain.
  • 13 52 7 797 906 Sprocket for the high pressure pump drive.
  • 11 27 7 800 523 Gearwheel (idler gear for the balancing shafts).
  • 11 31 8 510 014 Top timing chain.
  • 11 31 7 797 899 Sliding rail/guide rail for the top timing chain.
  • 13 52 7 797 904 Sliding rail/guide rail for the bottom timing chain.

N47, N47DK0, N47S, N47T, production period 05.01.2009 - 01.03.2011:
Renew:
  • 11 31 8 506 652 bottom timing chain.
  • 13 52 7 797 906 Sprocket for the high pressure pump drive.
  • 11 31 8 510 014 Top timing chain.
  • 11 31 7 797 899 Sliding rail/guide rail for the top timing chain.
  • 13 52 7 797 904 Sliding rail/guide rail for the bottom timing chain.

----------------------------------------

Now dealing with part numbers changing or not changing; a simple quote:
'Note: New sliding rails are available from March 2011.
These sliding rails no longer have any strengthening bars.
The contact face on the sliding rails is therefore thoroughly even.
The timing chain runs quietly over the sliding rails.
The part numbers have not changed.'

----------------------------------------

The lower chain changed numbers on 21/07/2009
The top chain changed numbers twice on 23/03/2009 and 08/12/2009
Cam Sprocket changed numbers on 13/01/2011
And for good measure the turbo on these is now on the 5th number since new.

Number changes are no guarantee of a change in the part, in the same way that no change is a guarantee that the part has not changed.

----------------------------------------

The above is for the symptoms of a noisy chain/engine. When a chain breaks it's a totally different ballgame...

Kind Regards,
Eddie.
www.bmwcare.comBMWcare
End of Quote:

As 3 of my friends have BMW cars with the offending N47 engine I will be advising them of their options. I recon that the trade in value of a BMW with the potential catastropic failure of the N47 engine having the build dates above (according to Eddie) must be falling rapidly at franchised dealers.
Neither would I be happy to purchase a BMW that had a "fix" of the problem at a franchised dealership. I would be pluckier in purchasing a rebuilt engine by an independent specialist that specialises in diesel engine overhaul.
Now I know what the "Sterling Collection" was all about, off loading the 2 liter diesel versions into a Nation that are less likely to get organised and complain. Its time for Jeremy Clarkson to spill the beans on this BMW disaster as he did in relation to the problems with the Nissan Navara some years ago. Nissan UK finally caved in and covered the failure under the warranty.
www.knackerednavara.co.uk
Is it time to have a similar site for offending BMW cars?
I will also be advising my friends that are thinking of changing to BMW (one a brother of mine and another a lad working with me) to have enough courage to drive the 6 cylinder version if you want a diesel BMW, pay the extra bit of road tax and enjoy the extra bit of power.
 

·
Registered
Joined
·
434 Posts
im looking for a 320d/520d 2007 163bhp at the moment in order to avoid this problem, however i was under the impression that the chain issues were on the later 2007 models lci 177bhp motors!

am i right im thinking this ?? or do i need to go back to the drawing board
 

·
Premium Member
Joined
·
5,203 Posts
Jaysus, don't sign that petition, you will put me out of a job :D

We are doing about 1 a week (takes two days to do) at this stage with most of them broke!!!!
 

·
Registered
Joined
·
111 Posts

·
Chuck Norris's Nemesis
Joined
·
1,233 Posts
We just traded ours in to avoid this issue hitting us:D
My neighbour has just done the same - some poor bastid out there will buy it solely for the "cheap tax" with the mickey mouse 3 month "engine & box" warranty and it will potentially bankrupt them....:eek:

Here it is coincidentally !

They were advised that is was showing signs of eventual failure so got rid pronto...
 

·
Registered
Joined
·
1 Posts
N47 timing chain failure

Hi All,

New to here, lady posting. Have a 2008 BMW. Have just been hit with this issue, and BMW have offered to pay for parts. This is admitting that there is a problem with the car/engine design. If there is a flaw, which there so obviously is, they should pay for full repair. I paid a LOT of money for this car, absolutely floored, have been told it will cost in full 5 grand to fix. I am that poor bastid, Big H, who was won over by the low car tax. I am livid to be caught like this, and really need my car. Devastated. Can anyone help? I put my VIN no. last 7 digits into the database suggested above, and I am one of these unfortunates. I just want my car fixed. I should not have to pay.

picturehangup
 

·
Registered
Joined
·
244 Posts
Has anybody had it done in bmw and if so did bmw pay for all or part of it..been talking to a good friend of mine who works in bmw and was telling me that if u bring ur car in and pay the diagnostic fee(around €100) to find out wat the noise is then basically give out like fooook and make as much noise with them and bmw ireland they tend to do all or 50/50...just wondering if anybody has and if so wat was the outcome
 
1 - 20 of 31 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top