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

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

  1. 22 Apr 2011 at 3:16 PM #41
    Hitman

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    the ticking seems to be behind the front drivers side wheel someplace.

    Yeah the car hums like a beast in higher gears :)

    how do you clean the injectors? is there a diy on here?


    What shall i use? Mr sheen or sumin?
     
  2. 22 Apr 2011 at 7:57 PM #42
    m thriller

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    Just get some redex petrol cleaner from halford etc and try the bottle with 2 tank fulls and see if it gets any better.
    Won't do any harm cleaning the fuel system if it isn't the problem.:peace:
     
  3. 29 Nov 2011 at 4:28 PM #43
    h8rna

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    Help please 2002 m3 misfire

    Hi to all on here. I am the proud but skint owner of a 2002 m3. After my previous car being a mk5 golf gti turbo @ 270bhp, i can safely say that these M3's produce more smiles per gallon but defo less miles!! I am experiencing serious problems with mine. After starting it up at work, i instantly felt a misfire under foot. Car did not drive as usual and had a "rattle". I drove home steadily hoping that noise would go and performance would improve... It didn't. After looking on the net, I discovered loads of problems with vanos bolts and the like. I managed to get a bmw technician to do an investigative foreigner. He found that my exhaust gear hub attached to the vanos had sheared both locators off!! I had him replace both this and the vanos, checked all bolts and changed oil. Now when the car runs it is lumpy and noisey on tickover,but still drives at full (to my limited M3 knowledge) power. He has told me of misfire fault codes and carried out a compression test to reveal cylinders 1 and 2 are half that of the rest. From reading this thread, am i right to assume headgasket?? I am sceptical to have head investigated as i can't bear another bill with limited or no results. Please advise if poss and anyone in the midlands (Wolverhampton) area who could carry out work at a reasonable cost. Many thanks guys. 2002 m3 112k miles.:thumbsup: Sorry,just thought i'd explain that i am using my mates log in, as he has had good results from this site. Again thanks.
     
    Last edited: Nov 29, 2011
  4. 30 Nov 2011 at 11:05 AM #44
    chris.sarg

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    Certainly the compression test seems to reveal there's a problem with either or both cylinders 1 and 2. Sounds like what ever you do, you'll need to take the head off which means a new gasket anyway. Could be that the gasket has failed between cylinders 1 and 2 or you could have a worn valve seat or guide or a sticking valve in either cylinder. It could of course be a worn or sticking piston ring but that would have to be on both cylinders so perhaps less likely

    Do you have the actual compression test results? i.e. the actual values for each cylinder?

    You could have someone do a leak down test which should reveal more answers and tell you which is more likely - a headgasket or a valve issue. Again, though, either way I think you need to take the head off and investigate.

    I'm sure M Thriller has done several of these (or knows a man who can, I can't remember) and he's based in Birmingham I think, give him a shout or keep your fingers crossed he reads this!

    You can be skint when you buy an M3 I'm afraid.... at least not when you buy it, once you've spent a couple of grand on it, then you can be skint, but not right away! :)
     
  5. 16 Apr 2012 at 8:51 PM #45
    a9bnl

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    Do you need to replace the rocker head gasket as well?
     
  6. 16 Apr 2012 at 10:43 PM #46
    m thriller

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    Depends when u last changed it.
    90% of the cars we have done we never needed to change them but if its been a while since the inspec 2 then it might need one.:thumbsup:
     
  7. 29 May 2012 at 11:41 PM #47
    Hmm3

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    114k miles and mine sounds like an electric motor! Only just run in by the sound of it.
     
  8. 29 May 2012 at 11:45 PM #48
    Hmm3

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    Buty knowin my luck, by next week it will be sounding like someone shakin a box of spanners.
     
  9. 29 Nov 2012 at 8:27 AM #49
    fenbelton

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    Yes common problem, Pinking, pinging, whatever noise you wanna call it. Dont be fooled by 'its an M3 tbey never blow gaskets' and have knocking sensors replaced, put injector cleaner in. Funniest remedy i was told by a bmw speacalist, was to reset the vanos. Pleeeease. If you experience pinging noise around 2-4 rpm whender load. Get ya headgasket replaced! Simple. I have been there!
     
  10. 29 Nov 2012 at 10:13 PM #50
    m thriller

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    LOL!......that reminds me of when my headgasket went a good few yers back...........think must have been 1 of the 1st in uk to have it happen and most so called indys came out with same scenario....vanos. knock sensors etc etc.
    Like the man said, if u get rattle between 2-4k rpm then 99% its headgasket and compression test will tell u straighaway.
     
  11. 29 Nov 2012 at 10:16 PM #51
    m thriller

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    sorry mate, completely missed your post.
    Yes almost certanily sounds like headgasket but get a compression check done and pm results and i can confirm for you.

    I get the whole job including all genuine bmw parts, tws oil, labour coolant etc etc done for around £900 cash.

    We have done around 20 e46 m3 headgaskets now and currently have another members car here at the moment which should be finished for weekend.
    I am in birmingham, so not far from you.:thumbsup:
     
  12. 5 Jan 2013 at 12:59 PM #52
    m4mad

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    Mine is at 102k and sounds as fresh as the day it left German shores, very informative post, thank you
     
  13. 30 Jan 2013 at 8:10 PM #53
    M3 K

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    thanks for info
     
  14. 25 Mar 2013 at 11:52 AM #54
    Ransom

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    How likely would this be on a well looked after lower mileage example?
     
  15. 3 Apr 2013 at 10:35 AM #55
    chessers

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    Mine went and my car had less than 35k on the clock. Always had oil changed minimum of once per year, so can go on any car
     
  16. 3 Apr 2013 at 10:53 AM #56
    schooner32

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    That's bad luck. Id be fighting BMW for some compensation. But then again no one knows how it was driven before you got it
     
  17. 15 Apr 2013 at 8:53 PM #57
    m8rk

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    This maybe a silly question but is it not possible to change the head gaskit as a serviceable item ??? i.e every 40k ?? or is it not that simple ??


    Mark
     
  18. 15 Apr 2013 at 9:09 PM #58
    fenbelton

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    I would say, its not that sime unless you absolutly know what ya doing or have enough £££ to do so!
     
  19. 15 Apr 2013 at 9:32 PM #59
    schooner32

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    No mate. One head gasket change in a cars life is more than adequate. Its a labour intensive operation and the gasket alone is damn expensive and the bolts are not reused which are expensive aswell id imagine l knowing bmw.
     
  20. 16 Apr 2013 at 9:36 PM #60
    m8rk

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    So maybe at say at 100k would be worth it and arp bolts and new bearings and shells a mini rebuild !!


    Mark
     

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