E46 M3 Headgasket Problems...... Buying a High Mileage M3?

Discussion in 'Faults, Fixes and Solutions' started by m thriller, Dec 11, 2009.

  1. 17 Jan 2010 at 9:20 AM #21
    I-Love-M3

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    One of the main reasons why a head gasket is prone to fail, imho, is the oil and coolant in the car not being replaced at intervals or soon.

    As oil gets older, you all will notice how black it gets, but it also gets very, very thin and lose its properties which mean that it will go and carbonise at places it normally will not stick.

    Fresh oil has sticky properties and does not heat up a much as old oil thus keeping it at a temperature the engine and its loads can take.

    Was it fifth gear who ran a test recently on what happens to a car when the oil is low or rund out....the parts including head hasket became fused together.

    A well lubricated car with freshest oil is a fantastic and cheap way to maintain engine efficiency - i know people are different but i definiteky feel a bit more grunt in the car when I've just changed the oil.

    Each to his/her own but I swear by regular oil changes for preventative measures. I am planning on keeping my m3 for at least 5 years and only doing about 2.5 k per annum. at 76k now, thats about 88 k miles for a 12 year old car so my intervals on oil changes will be minimum once a year.....
     
  2. 17 Jan 2010 at 9:31 AM #22
    shimmy

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    mine had oil change every 5-6k miles :thumbsup:
     
  3. 17 Jan 2010 at 10:32 AM #23
    M3CD

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    Excellent thread - well done M Thriller - rep added.
     
  4. 15 Feb 2010 at 4:26 PM #24
    Neil McRae

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    X5's have a similiar problem with HG going on 80Kish miles also.
     
  5. 7 May 2010 at 5:20 PM #25
    m thriller

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    Last edited: May 7, 2010
  6. 19 May 2010 at 8:23 PM #26
    gledy2

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    very helpful, cheers
     
  7. 19 May 2010 at 9:49 PM #27
    m thriller

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    No problem.
     
  8. 19 Sep 2010 at 6:25 PM #28
    gazman

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    head gasket

    i am a new member and not really sure how all this works so i will go ahead and ask my question and i hope im not offending anyone by not really introducing myself properly. i would like to get a compression test done on m3 and would like someone to recommend a good mechanic i am in the surrey area
     
  9. 21 Sep 2010 at 9:34 AM #29
    Monkey

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    As a preventative measure, It would also be benficial to change/replace the vanos bolts at the same time. According to recent reports, there is a high chance that they will be working there way loose on cars with over 50kmiles. BMW are aware of this issue so have redesigned them.
     
  10. 31 Dec 2010 at 4:53 PM #30
    Nick1975

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    my m has 45,000 on it, I will get this checked next pit stop, :thumbsup: cheers
     
  11. 12 Jan 2011 at 7:37 PM #31
    littlejohn

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    Couldn't agree more on the oil front I have always changed mine on a more than regular basis when I had my garage I put it this way to customers ITS THE BLOOD OF THE ENGINE !!
     
  12. 7 Mar 2011 at 1:05 PM #32
    DJ Syxx

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    How common is this problem? Only I did a search on E46 Fanatics and couldn't find any threads about headgaskets going on M3's?
     
  13. 7 Mar 2011 at 3:13 PM #33
    m thriller

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    Getting common now, especially as the mileages rack up and cars getting older.

    I must have arranged headgasket replacement for atleast 10 e46 m3's now, and approx 6-7 car are from the forum.

    There not too bad because considering all the members on here and only 6-7 cars..............not too bad of a ratio.:thumbsup:
     
  14. 10 Mar 2011 at 10:25 PM #34
    a9bnl

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    Hi,
    were you getting alot of pinking noises? was it worse when the engine was under pressure, say going up a hill in fourth something that this torquey engine should cope with anyway.
     
  15. 21 Apr 2011 at 8:18 PM #35
    Hitman

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    Is there anyone on cutters that can do a compression test for me?

    I just want to ensure my head gasket is not going to go pop.

    i am getting a very faint marble sound between 1200 to 2000 revs.
     
  16. 21 Apr 2011 at 8:20 PM #36
    Lancerlot

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    M Thriller is your man
     
  17. 22 Apr 2011 at 2:47 AM #37
    m thriller

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    Where abouts in the country are u mate?

    If u can remove spark plugs, then u should be able to do the test your self.
    Do u get the marble rattling sound at like 30-50% throttle between 1500-3k rpm?
    Does it do it more when in a higher gear like 5th or 6th?
    Drive at a steady 1500 rpm in 4th and then slap the pedal to the metal....can u here the marble sound when throttle is at WOT between the same rev range?
    Do it again if u dont here anything but use 30-50% throttle....can u hear it now?
     
  18. 22 Apr 2011 at 12:58 PM #38
    Hitman

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    Im in the mids, near leicestershire.

    I just did a good run and noticed that the rattling/tapping is mainly noticeable between gears 1 and 2 at between 1-2k revs at 30% gas.

    At gears 4,5 and 6 sometimes you can catch a faint rattling/tapping but its very faint at 40% gas.

    Basically at low revs you can hear it, but revs higher than 2.5 the rattling is like someone holding a corner of a piece of paper against a moving fan and you get that fast flicking sound.

    if that makes any sense

    The cars always been like this since i got it, over 8000 miles ago. Its not got any loader.
     
  19. 22 Apr 2011 at 1:51 PM #39
    M3NTALIST

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    i wouldnt have described my noise like you have so maybe you're not looking at HG.
    when my HG was goosed i found that the noise was more promenant in higher gears going up hills.

    andy.
     
  20. 22 Apr 2011 at 1:57 PM #40
    m thriller

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    yep its normally alot louder and more noticable in the higher gears between 2-4k rpm and worst in 6th.

    U might have something else like a knock sensor or dirty injectors which could be causing it to pink.

    Any decent garage should be able to do the compression check for u and shouldn't cost much more than £40-50.
     

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