N47 Timing chain info thread *QUALITY ENHANCEMENT/RECALL ISSUED* - please read before posting

Got a problem with your BMW 1 Series? Post your car problems here and seek advice from fellow car owners.

Moderators: Rich196, babybmwadmin, marco_polo, Producethis, Lambster

Post Reply
User avatar
Shrimpvende
Experienced Member
Experienced Member
Posts: 351
Joined: Thu Dec 27, 2012 4:10 pm

N47 Timing chain info thread *QUALITY ENHANCEMENT/RECALL ISSUED* - please read before posting

Post by Shrimpvende » Tue May 27, 2014 12:52 am

I'll leave my original post intact for information, however in the last week it seems that BMW have finally admitted fault for premature wear of the timing chain. Cars are now being checked when in for a service as part of a 'Quality Enhancement'. If your car falls into the 'danger' bracket of the earlier engines and is getting noisy give your local dealer a call to make sure you are covered.

They are replacing the chain tensioners with a revised part and also checking timing chains for premature wear/stretching. If this is found they are also replacing the chain.

link to the PDF of the bulletin: http://www.e90post.com/forums/attachmen ... 1427723613


We seem to have had lots of threads asking about timing chains recently, so I thought rather than keep writing similar answers it would be better to put all info into one place for easy reading and to refer people to. This isn't a thread for reporting failures or noise as there's already plenty of those! All rough Prices quoted are from Indy's, NOT BMW main dealers. Please correct me if I'm wrong with any of this, but I've compiled it through my own research after having the problem.

EDIT: Engine codes don't seem to be matching up properly, so go by DATE of production/registration, not engine code. Also to point out, your car could have been produced a while before it was registered, which is why I originally thought engine codes were better. If anyone has any further info regarding this please add it!

Which cars are affected?

ALL N47 engined cars (114D, 116D, 118D, 120D, 123D, 125D) produced from 2007 onwards can be affected, with the potential impact and likelihood of it occurring being higher in the earlier models.

01/02/2007 - 05/01/2009 - Danger Zone

These are the worst affected engines. These are more likely to get noisy and CAN FAIL. To fully repair a noisy chain on one of these models will require a new crankshaft, guides and chains. Average repair price £1500-2000. (NB the chains and guides can be replaced without changing the crank, costing £1000, but this cannot guarantee the chain will not snap in future).
If the chain snaps the repair bill increases substantially, depending on the speed at the time of the failure. (More about this below)

05/01/2009 - 01/03/2011 - Won't snap, still noisy

These are the first revised engines, featuring the new crank and newly designed guides. These are less likely to get noisy, and there are no reported instances of them failing. To repair a noisy chain on one of these engines will cost around £1000, as only the chains and guides are replaced.

01/03/2011 onwards - Won't snap, still noisy

These engines feature the latest revised parts. However can still get noisy, even in the newer F2x models. BMW are refusing warranty repairs to cars with the latest revised parts if they are noisy, although we have a couple of members on here that have successfully managed to get them done under warranty. There is no risk of failure, just the noise, and BMW have yet to figure out how to solve this.

When it comes to changing noisy chains, BMW are offering 'Goodwill' gestures to owners who have a full BMW service history and reasonable mileage (under 100k). Some people have managed to get an 80% reduction in repair cost, whereas others only achieve around 50% off parts. It's done on a case by case basis so you need to argue your case to the service manager, especially if the car was bought as an AUC etc. If you think you qualify for goodwill then get it booked in for diagnosis at BMW and get a claim going!

My chain's failed - what are my options?

- Goodwill. What is your mileage and service history? If the history is full BMW and mileage is reasonable (<100k) then get the dealer to get a goodwill claim going. Be careful if they want to charge you for diagnostics, A full snapped chain diagnosis can be over £1000. Goodwill, if approved, could see a heavily reduced bill - but it's also a risk because of the diagnostic charge. Also BMW won't repair engines, and a new engine fitted is around £7,000 from them so even a discounted bill will be large.

- New (secondhand) engine. Not advisable to buy one from ebay - to bigger risk and too many variants to ensure perfect match and no issues. Even a decent engine could have issues if not an exact match. This replacement engine would also need the updated parts to ensure it won't fail again, which would be difficult to confirm. Only place I'd buy from would be somewhere like Quarry motors, but they're expensive. Not really a good option.

- Engine rebuild. Depends how fast you were going/revs when it failed, but if it was on startup (as most are) then the damage shouldn't be catastrophic. I've seen quotes in the £2-3000 region for this from specialists advertising the service, depending on extent of damage and what else needs doing (new cranks are nearly £1000 on their own). This would most likely be my favoured option, from a trusted specialist such as Peter Van Der Veer. At least you'd then know that you had a freshly rebuilt and inspected engine with the latest chain related parts so this couldn't happen again, hopefully giving some peace of mind and ensuring the car lasts much longer.

I'm worried, which warranty should I buy?

A warranty could potentially save you a massive bill, but be careful here. Due to the nature of the problem (guides wearing out rather than explicitly failing) and engines needing to be removed because of a 'funny noise' most 3rd party warranty companies will not pay out to have a noisy chain replaced, and leaving it to snap in the hope they will then pay out is obviously a large gamble. They will make you pay for the engine to be removed so that they can diagnose the fault (around £4-500 labour) and then most likely deny the claim due to nothing having actually broken, leaving you out of pocket and with a car in bits. This is what my third party warranty provider tried to do.

The BMW Mondial warranty is by far the best bet here, and comes with 3 levels of cover. The price increases after 60,000 miles, and again at 100,000 miles, can be paid yearly or monthly, and can be reduced by setting either a £100 or £250 excess. However - be aware that the basic 'driveline' cover has a £5000 claim limit and therefore will not cover the full cost of a snapped chain, which is around £7000 at BMW. You've been warned!

How can I check to see if I have the problem?

If your chain/guides are badly worn there will be a loud metallic ticking sound coming from the back of the engine. The noise is most apparent at between 1500rpm and 2000rpm when stationary and through 1st, 2nd and 3rd gear. Mine sounded similar to a pushbike freewheeling or peddling backwards at higher rpm's. The best way to listen for it is to either park up against a wall, or to listen around the back of the passenger side front wheelarch whilst someone else holds it at 1500rpm. There are plenty of videos on youtube, from those with the beginning of the problem right up to seriously worn chains, have a search!

Who can repair my noisy chain?

It would be good to compile a list of trusted specialists that can repair chains, with their approximate prices and location. Please post details if you've had yours repaired and I'll add them to the list. I'll start with Peter as he's mentioned on here often.

Peter Van Der Veer

repair cost - £1000 noisy chain (without changing crank)
Location - Huddersfield

Sports Tech Ltd

repair cost - around £1250 noisy chain without crank (I didn't get a full quote as I got rid of the car, but I've used them before and they have done these repairs before and are trustworthy)
Location - Nottingham

JMC Service & Repair

repair cost - £1350 without crank
Location - Sutton in Ashfield
Last edited by Shrimpvende on Mon Mar 30, 2015 8:12 pm, edited 4 times in total.
E92 325D M Sport - Current
E81 118D M Sport - Gone

roshambo
Too Much Time To Waste Member
Too Much Time To Waste Member
Posts: 4926
Joined: Wed Apr 24, 2013 11:08 am
Location: Here, there, everywhere.

Re: Timing chain information thread - possible sticky?

Post by roshambo » Tue May 27, 2014 9:05 am

Nice post and defo useful but hopefully people actually read it before posting a new thread!


Matt

Sent from my iPhone using Tapatalk
Current: 2015 F36 435i M Sport
Old: 2013 F20 116d Sport; 2006 E87 120d M Sport

User avatar
Shrimpvende
Experienced Member
Experienced Member
Posts: 351
Joined: Thu Dec 27, 2012 4:10 pm

Re: Timing chain information thread - possible sticky?

Post by Shrimpvende » Tue May 27, 2014 9:14 am

At least if they don't we can just direct them here without typing it out again :)
E92 325D M Sport - Current
E81 118D M Sport - Gone

User avatar
abbeylima
Experienced Member
Experienced Member
Posts: 222
Joined: Fri May 16, 2014 11:40 pm
Location: Newcastle

Re: Timing chain information thread - possible sticky?

Post by abbeylima » Tue May 27, 2014 9:22 am

Thanks for the valuable info
______________________________________________________________________________
Mineral Grey 2012 F30 320d Luxury Line: 06/2015 - Present
Metallic Silver 2010 118d SE - N47D20U0: 05/2014 - 06/2015

User avatar
MontegoBlue
Enthusiastic Member
Enthusiastic Member
Posts: 1376
Joined: Sun Jan 20, 2013 5:35 pm

Re: Timing chain information thread - possible sticky?

Post by MontegoBlue » Tue May 27, 2014 10:18 am

Great info! Very informative, but my question is my 2008 (58Plate) 118d has the N47D20C engine code...would it be possible they used revised engine parts all the way back to late 2008/9?

northandy
Enthusiastic Member
Enthusiastic Member
Posts: 1310
Joined: Thu Jul 21, 2005 12:36 pm
Location: Stockton on Tees

Re: Timing chain information thread - possible sticky?

Post by northandy » Tue May 27, 2014 10:22 am

MontegoBlue wrote:Great info! Very informative, but my question is my 2008 (58Plate) 118d has the N47D20C engine code...would it be possible they used revised engine parts all the way back to late 2008/9?
No, my 2012 car had a new chain last year, I had to wait 5 weeks for revised parts as they had just been released (was a change to the tensioner I believe).
BMW X3 3.0d M Sport delivered April 2015

northandy
Enthusiastic Member
Enthusiastic Member
Posts: 1310
Joined: Thu Jul 21, 2005 12:36 pm
Location: Stockton on Tees

Re: Timing chain information thread - possible sticky?

Post by northandy » Tue May 27, 2014 10:25 am

Good info, the only thing I would say is that BMW are saying there's no risk of failure on the later cars, I still believe it's too early to say that. My 2012 car has covered 30,000 miles on the new chain, and the noise is back (although not as bad).
BMW X3 3.0d M Sport delivered April 2015

User avatar
swirly182
Experienced Member
Experienced Member
Posts: 324
Joined: Sun Jul 28, 2013 8:51 pm

Re: Timing chain information thread - possible sticky?

Post by swirly182 » Tue May 27, 2014 10:45 am

Thanks for this summary post. Mine is a September 2009 car and since buying it I have heard a very slight metallic rattle noise. Think I will be ringing BMW before the used warranty runs out!

Sent from my Nexus 5 using Tapatalk
123d M Sport 3dr Auto. Ex Focus ST.

irh77
Junior Member
Junior Member
Posts: 25
Joined: Thu Mar 06, 2014 8:04 pm
Location: Stoke on Trent

Re: Timing chain information thread - please read before pos

Post by irh77 » Tue May 27, 2014 8:05 pm

My engine code is N47D20UO. Is this type A or B? It's in a 118d registered 25/09/09.

Image

Sent from my GT-I9505 using Tapatalk

User avatar
Shrimpvende
Experienced Member
Experienced Member
Posts: 351
Joined: Thu Dec 27, 2012 4:10 pm

Re: Timing chain information thread - please read before pos

Post by Shrimpvende » Tue May 27, 2014 8:24 pm

irh77 wrote:My engine code is N47D20UO. Is this type A or B? It's in a 118d registered 25/09/09.
I believe the engine codes aren't quite adding up as I thought they should, I'll edit the original post. Going by the date yours is 'safe', and falls into the second category of engines. Chain can still get noisy but won't snap, and a repair for a noisy chain will be around £1000, requiring only chains, guides and tensioner
E92 325D M Sport - Current
E81 118D M Sport - Gone

irh77
Junior Member
Junior Member
Posts: 25
Joined: Thu Mar 06, 2014 8:04 pm
Location: Stoke on Trent

Re: Timing chain information thread - please read before pos

Post by irh77 » Tue May 27, 2014 8:29 pm

Thanks for the reply, at least I can be safe in the knowledge it won't let go.

Sent from my GT-I9505 using Tapatalk

User avatar
moonshine
Experienced Member
Experienced Member
Posts: 305
Joined: Tue Dec 12, 2006 8:42 pm
Location: Glasgow

Re: Timing chain information thread - please read before pos

Post by moonshine » Tue May 27, 2014 8:37 pm

Shrimpvende wrote:
I believe the engine codes aren't quite adding up as I thought they should, I'll edit the original post. Going by the date yours is 'safe', and falls into the second category of engines. Chain can still get noisy but won't snap, and a repair for a noisy chain will be around £1000, requiring only chains, guides and tensioner
yip ... seems to be the case... my wife’s car is a Nov 10 build 120d auto and it is an N47D20C according to the sticker on the drivers door

Jimmyrallye
Knowledgeable Member
Knowledgeable Member
Posts: 143
Joined: Sat Jan 18, 2014 2:12 pm

Re: Timing chain information thread - please read before pos

Post by Jimmyrallye » Tue May 27, 2014 9:57 pm

Very helpfull thread what info do you have on 2005 reg cars especially a 118d , thanks jimmy

User avatar
marco_polo
Too Much Time To Waste Member
Too Much Time To Waste Member
Posts: 45995
Joined: Tue Apr 06, 2010 9:40 am
Location: Omnipresent Post Whore

Re: Timing chain information thread - please read before pos

Post by marco_polo » Tue May 27, 2014 10:06 pm

This is a thread for the problematic N47 engines, not the reliable (2004 - 2006) M47.

Please read before posting people.
Silver F21 M135i - ManBox - HK - Adaptive + Eibach Pro's - BBS CH-R's - BMWP Drexler LSD - TMC Piggyback - M4 LCA's - aFe Dry Filter

Please help the Mod's by using the report [ ! ] button where appropriate

Jimmyrallye
Knowledgeable Member
Knowledgeable Member
Posts: 143
Joined: Sat Jan 18, 2014 2:12 pm

Re: Timing chain information thread - please read before pos

Post by Jimmyrallye » Wed May 28, 2014 8:52 am

Oh cool so I have a m47 engine then ive just took out warranty as well because of you lot

Post Reply

Return to “BMW Problems”