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2011 F10 BMW 520 - noise at start up

  • 04-01-2020 03:30PM
    #1
    Blub123
    Registered Users, Registered Users 2 Posts: 190 ✭✭


    Just this past few mornings noticed a rattle sound for approx 2 or 3 secs when I start the car in the morning, thereafter settles down to normal engine sound. During this time there is an increase in the revs.
    Doesn't seem to happen if I start the car throughout the day.
    Any ideas? Should I be worried.
    Approx 140k kms on the engine. Otherwise car hasn't missed a beat.
    Thanks


Comments

  • #2
    Stoolbend
    Registered Users, Registered Users 2 Posts: 1,286 ✭✭✭Stoolbend


    Top timing chain. Can be replaced in situ.


  • #3
    Blub123
    Registered Users, Registered Users 2 Posts: 190 ✭✭Blub123


    Stoolbend wrote: »
    Top timing chain. Can be replaced in situ.
    Thanks for that.
    Expensive job?


  • #4
    Stoolbend
    Registered Users, Registered Users 2 Posts: 1,286 ✭✭✭Stoolbend


    No idea to be honest. Never did one but was told by a BMW master mechanic about it.

    When the chain starts to stretch it'll rattle just after changing oil and filter or first thing in the morning.

    Best bet is to find a BMW specialist nearby and talk to them


  • #5
    Bunkernumber1
    Registered Users, Registered Users 2 Posts: 65 ✭✭Bunkernumber1


    Stoolbend wrote: »
    Top timing chain. Can be replaced in situ.

    Incorrect info.

    Only the top chain can be replaced in situ.what about the other 2 chains and guides and rails etc.

    If you dont know dont pretend you do.its engine out job and very common we do them all the time.


  • #6
    Whocare
    Registered Users, Registered Users 2 Posts: 1,237 ✭✭✭Whocare


    Bunkernumber1 wrote: »
    Incorrect info.

    Only the top chain can be replaced in situ.what about the other 2 chains and guides and rails etc.

    If you dont know dont pretend you do.its engine out job and very common we do them all the time.

    I have 2013 320d when do think it should be replaced have ing no problem with it now no noise


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  • #7
    Bunkernumber1
    Registered Users, Registered Users 2 Posts: 65 ✭✭Bunkernumber1


    Whocare wrote: »
    I have 2013 320d when do think it should be replaced have ing no problem with it now no noise

    Yours could of being done under recall.but what mileage is on it if it's around or over 100 and you know it wasnt being done under recall I'd be getting it done soon and knowing where u stood with it.its a simple job for anyone that's done them


  • #8
    Whocare
    Registered Users, Registered Users 2 Posts: 1,237 ✭✭✭Whocare


    Bunkernumber1 wrote: »
    Yours could of being done under recall.but what mileage is on it if it's around or over 100 and you know it wasnt being done under recall I'd be getting it done soon and knowing where u stood with it.its a simple job for anyone that's done them

    It has 95000 miles


  • #9
    Bunkernumber1
    Registered Users, Registered Users 2 Posts: 65 ✭✭Bunkernumber1


    Whocare wrote: »
    It has 95000 miles

    At that mileage with no record of it being done I'd be getting it changed.just so you know its engine out job.and who ever does the job make sure they use the genuine bmw parts.not these lads offering to fo it for x amount of money and the timing chain kit costing them 150 quid stay away from them.
    And trust me do get it done because if it snaps and it will snap if left go u will be in for a big big bill.
    Only finished one there that I'd to put a full set of valves into a new con rod and a full set of rockers.

    Anyways if ya have any other questions fire ahead


  • #10
    This is it
    Registered Users, Registered Users 2 Posts: 6,061 ✭✭✭This is it


    What year did the engine change from N47 for the 520?


  • #11
    Bunkernumber1
    Registered Users, Registered Users 2 Posts: 65 ✭✭Bunkernumber1


    This is it wrote: »
    What year did the engine change from N47 for the 520?

    N47 engine arrived say 2008 if memory serves me correctly following on from that there have being quite afew versions of the n47 but basically using the same bottom end and top end as b4 few differences


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  • #12
    This is it
    Registered Users, Registered Users 2 Posts: 6,061 ✭✭✭This is it


    Bunkernumber1 wrote: »
    N47 engine arrived say 2008 if memory serves me correctly following on from that there have being quite afew versions of the n47 but basically using the same bottom end and top end as b4 few differences

    And when did they finish up using it in the 520?


  • #13
    Leonard Hofstadter
    Registered Users, Registered Users 2 Posts: 5,541 ✭✭✭Leonard Hofstadter


    This is it wrote: »
    And when did they finish up using it in the 520?

    Cars built after about September 2014 will use the more reliable B47 engine. All pre-facelift cars and the earliest facelifted cars use the N47N engine (the one with the timing chain problem).

    If you're not sure which engine the car has got, the models with the N47N engine have a type code of 5C32, whereas the type code is 5E52 for the models with the B47 engine.

    The 'type code' is characters 4 to 7 on the VIN number, which you can see on the windscreen on the passenger's side (near the wiper blades). These are the four characters immediately after 'WBA' on the VIN number. There's also a different engine cover (google is your friend) for the cars with the newer engine, too.


  • #14
    Blub123
    Registered Users, Registered Users 2 Posts: 190 ✭✭Blub123


    Bunkernumber1 wrote: »
    Incorrect info.

    Only the top chain can be replaced in situ.what about the other 2 chains and guides and rails etc.

    If you dont know dont pretend you do.its engine out job and very common we do them all the time.

    Expensive job?
    Does it need to be done urgently?
    Thanks


  • #15
    LillySV
    Registered Users, Registered Users 2 Posts: 1,749 ✭✭✭LillySV


    Bunkernumber1 wrote: »
    Yours could of being done under recall.but what mileage is on it if it's around or over 100 and you know it wasnt being done under recall I'd be getting it done soon and knowing where u stood with it.its a simple job for anyone that's done them

    They aren’t covering the 520d under recall so hardly offering it for the 3 series!?


  • #16
    Leonard Hofstadter
    Registered Users, Registered Users 2 Posts: 5,541 ✭✭✭Leonard Hofstadter


    Blub123 wrote: »
    Expensive job?
    Does it need to be done urgently?
    Thanks

    If it's rattling it needs to be done ASAP. I personally wouldn't drive the car until it's been checked out and given the all clear, there is the risk the entire chain could give up the ghost and write off the engine.


  • #17
    grogi
    Registered Users, Registered Users 2 Posts: 8,617 ✭✭✭grogi


    Blub123 wrote: »
    Just this past few mornings noticed a rattle sound for approx 2 or 3 secs when I start the car in the morning, thereafter settles down to normal engine sound. During this time there is an increase in the revs.
    Doesn't seem to happen if I start the car throughout the day.
    Any ideas? Should I be worried.
    Approx 140k kms on the engine. Otherwise car hasn't missed a beat.
    Thanks

    Ah, good auld N47 chain....


  • #18
    grogi
    Registered Users, Registered Users 2 Posts: 8,617 ✭✭✭grogi


    Blub123 wrote: »
    Expensive job?
    Does it need to be done urgently?
    Thanks

    Not urgent, but once it snaps it really is game over for the car.

    It is expensive... Might be three digit figure if you're lucky, probably four thought all in.


  • #19
    Blub123
    Registered Users, Registered Users 2 Posts: 190 ✭✭Blub123


    Leonard Hofstadter wrote: »
    If it's rattling it needs to be done ASAP. I personally wouldn't drive the car until it's been checked out and given the all clear, there is the risk the entire chain could give up the ghost and write off the engine.

    So priced a few guys, genuine only and there was a guy near my parents place who did the replacement of the timing belt, replaced the turbo, set of brake pads front and back and full service incl filters.. Total 1365....think I did reasonably well out of it... Car feels great to drive now.


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