N47 engine timing chain failure....

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  1. N47 engine timing chain failure.... 
    #1
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    Miss t's Car Details
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    Hi everyone, I'm new to the forum and hate to start on a negative HOWEVER, has anyone experienced the above failure in the past or present. I have had his happen to my four (albeit almost five) year old car. I am now funding this being fixed by BMW and I am keen to hear from others that have had this issue.

    I understand this issue is a known fault with the N46/47 engines - that did not require recall. Please get in touch if this has previously happened to your car, as I am keen to hear how this was resolved.

    Regards,
    Clair (miss t)
     
     

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    Hi Clair, welcome to the forum

    It was a problem on early engines from March 2007 for about a year, it is not actually the chain but rather the crankshaft and is completely inaccesable and so expensive to replace. The only way to resolve is to replace the crankshaft and lower chain

    Not great news as yours is affected, BMW used to replace the whole engine but now just repair, if it has a full service history they may if you are lucky provide some good will help
     
     

  4. Thanks 
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    They thanks for the post. Is this a know issue with these engines- meaning might they recognise use liability?

    Regards,

    Clair
     
     

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    BMW are real gits about recognising liability and only recognise safety issues rather than mechanical ones that cost money. When did you buy the car? and where from? also have you had BMW service it or not. They did replace engine that failed under warranty but they are pretty tough on those that are out of warranty, if you ahve serviced it with BMW they may agree to some good will and pay labour but they will still insist you pay parts which won't be cheap.

    How loud is it? you just want to part-ex ASAP and get a new one or depending on the cost get and independant garage to look at it, sadly the engine needs to come out what ever but once out the work actually quite easy as access is easier
     
     

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    It is a known issue but unofficial.
    The crankshaft sprocket has been redesigned since.

    There are 3 "features" with this engine that come together to create a nightmare.
    Firstly, they decided to make an unusual choice of putting the timing chain at the back of the engine which means the engine needs to be removed from the car to inspect anything.
    Secondly, they have timing chain tensioner issues which can result in a grinding or rubbing sound which is something that is documented.
    Thirdly, the cog that drives everything is friction welded onto the crankshaft and they have had a poor finish resulting to excessive wear to the chain, and you can't just replace the cog, the entire crankshaft needs to be replaced which is an expensive part.
     
     

  7. Mine failed! 
    #6
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    My one just failed whilst I was on my way home at 10pm after a 13 hour shift! The AA eventually got me home 6 hours later (But thats another story!)

    Got it recovered to the garage the next day and they confirmed that it was the timing chain that had snapped (Mine is a 2008 08 E91 318se with 94k on tyhe clock fully serviced with main dealer the last one was at a BMW specialist)
    I took it to a BMW specialist and there solution was to rebuild it replacing any bent valves etc min cost would be 3700 max 4900. Or I could have a brand new engine for 6000. You can imagine my frustration just before Xmas, infact I nearly vomited.

    In the end I decided to buy a second hand engine from a reputable trader on the internet, it was taken from an 09 reg BMW (N47engine) and had done 38k. (Did my research as there is alot of dodgy dealers out there) I ended up getting one from "365Engines" based in Bolton, for 1895 which was couriered to Worthing where my mechanic is. The labour charge was 900 plus a couple of little extras totalling up to 1000. So not alot of change out of 3000.

    I phoned BMW customer services who were polite and opened a case on it, but within hours they came back and said that because I had bought it outside of there network (I had bought it from a specialist prestige car dealer not BMW) and that I had had the last service also outside of there network that they will not touch. Appaling really, I mean it is quite clearly a manafacturing fault and they washed there hands of it, wriggled out of it. Tossers!

    I am not sure what to do with the car now as I dont really like it any more or trust it, I would never have a BMW again after this experiance. I am thinking of a Merc or a Lexus!

    Cheers

    Steve
     
     

  8. N47 engine failure - due to faulty timing chain 
    #7
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    Hi,
    I have a 4 year and 10 month old 318d with 150,000km (approx 95,000 miles).
    On Sunday while driving in town traffic the engine suddenly stopped.
    It was towed again and examined by a local garage on Tuesday.
    I was told that I would need to buy a new engine for my car. You can imagine the look on my face.
    First I was told that the timing chain had not be maintained. Then I came across all these N47 threads on engine failure.

    BWM you will not get away with this in this age of social media, I promise.

    Most of my driving is town driving with occassional 3 hour trips. Typically my oil is changed every 30,000-40,000 kilometres not that it should matter.
    If you have a defective design for the drive sprockect on the cam shaft that drives the timing chain, oil quality or the type of driving you do will have no bearing on the matter.
    I could have bought two Toyotas for the price of this car. Never again.
    Chris Lentzy, Ireland
    chrislentzy@gmail.com
     
     

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    Quote Originally Posted by chrislentzy View Post
    Typically my oil is changed every 30,000-40,000 kilometres not that it should matter.
    And you wonder why it failed.... even BMW wouldn't let it go past 25,000km without an oil change and most people with any sense change their oil every 16-19,000KM

    Quote Originally Posted by chrislentzy View Post
    of driving you do will have no bearing on the matter.
    Wrong, ragged cars suffer more, auto's rarely fail as you don't get the rapid reving you get on a manual

    You have to be a bit of a moron to come to a BMW forum and slate BMW's good luck with your facebook campaign but BMW are teflon coated so you are wasting your time
     
     

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    30-40k oil changes??!!?? I'd imagine the oil must have had to be chiseled out if the sump rather than drained....
     
     

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    matthew_henson (12-12-2012)

  12. E60 520d Engine Noise 
    #10
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    Hello,
    I have this 520d e60 57 plate for last two years with 128k on the clock with full bmw service history, last one two months ago..... since last week engine noise has gone up and noticeable..i have stopped driving the car. I am hoping its not drive chain, what I can read quite a lot on this forum.
    please advice would be best to bmw look at this for diagnosis???????
     
     

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