C63 Cracked Camshaft Cover

Discussion in 'AMG Lounge' started by Gnasher141, Mar 15, 2019.

  1. Gnasher141

    Gnasher141 New Member

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    F427F4BB-98A3-42DB-A241-775838D2A46D.jpeg
    My 2012 C63 started smoking from rear of engine after giving it some welly. Rang Autoprotect warranty and they said to get it diagnosed at my cost then get the garage to ring the for authorisation.

    I purchased a new seal set as the cover would be coming off to diagnose the problem. Turned out the camshaft cover had a crack at the rear of cover near bolt hole.

    Garage rang Autoprotect for authorisation - sorry not covered as it’s not a mechanical part. Why didn’t they tell me that during first phone call, I could have saved £200 and done it myself.

    Paid for new cover and 7 hours wait and job was complete - £450 crack

    Has anyone else experienced this?
     
  2. GAV105N

    GAV105N Hardcore MB Enthusiast

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    Common problem on the M156
     
  3. OP
    OP
    Gnasher141

    Gnasher141 New Member

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    You say that, but I searched for it, and could only find 1 post on another MB forum.
     
  4. Steve84N

    Steve84N Hardcore MB Enthusiast

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    Well it is.

    There's a lot more C63 activity on places like Facebook groups and it comes up.
     
  5. Lee C63

    Lee C63 Hardcore MB Enthusiast

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    Maybe due to being overtorqued if it has been removed previously?

    Did you sort the issue with smoke?

    I know it’s common for a puff of smoke on staring, but under heavy driving sounds like something more serious?
     
  6. markjay

    markjay MB Club Veteran

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    I think the OP was referring to smoke under the bonnet resulting from oil leaking onto the hot exhaust manifold and burning-off, and not to smoke coming out of the exhaust.
     
    Lee C63 likes this.
  7. OP
    OP
    Gnasher141

    Gnasher141 New Member

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    I don’t do Facebook so wouldn’t have seen anything on there.

    Spot on, no smoke while driving, just noticed when stationary after period of higher revs.

    It may be caused by over torquing of bolt?? but there is a sleeve over the bolt, probably there to prevent distortion on assembly.

    To be honest I’m more pi$$ed off, by it not being covered on warranty.
     
  8. BTB 500

    BTB 500 MB Club Veteran

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    A lot of warranties are basically a form of breakdown insurance ... if the car is still running and roadworthy you're not covered.
     
  9. Steve84N

    Steve84N Hardcore MB Enthusiast

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    Not my problem. You doubted it being a common issue and I confirmed it is with reference to proof. Simples.

    Most likely due to the vast amounts of heat in the engine bay that they end up cracking from fatigue after expanding and shrinking so many times.
     
  10. brucemillar

    brucemillar MB Club Veteran

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    I have said it before. I shall say it again. Almost the entire Car Warranty business is run on random word/sentence generators. That spew out what you want to hear at the time of purchase, before defaulting to a back stop (often “wear & tear”) at the time you have a problem.

    As for getting you to pay before they agree the repair or diagnosis??? That is very dodgy (as you sadly found out)

    I wish I had a more positive song to sing here but I base this with one exception (Toyota) on personal experience with many cars over many years.


    Sent from my iPhone using Tapatalk
     
  11. John N

    John N Hardcore MB Enthusiast

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    The crack looks like a design fault to me! Can you expand on the "Common problem"? And what if anything was done about it?
     
  12. OP
    OP
    Gnasher141

    Gnasher141 New Member

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    Your right, it’s not your problem. I am sure you too busy dealing with you attitude problem.
     
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  13. Steve84N

    Steve84N Hardcore MB Enthusiast

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    There's no helping some people, especially those who are terrible at grammar...

    You started with the attitude suggesting Gavin was wrong from the tone of your reply. I tried to provide some reassurance you haven't been unlucky and you kick off. :rolleyes:
     
  14. Steve84N

    Steve84N Hardcore MB Enthusiast

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    The cam covers were changed to plastic on later cars, which don't suffer from fatigue cracks due to heavy heat cycling in the same way as aluminium.
     
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  15. OP
    OP
    Gnasher141

    Gnasher141 New Member

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    LOL

    Do you know why AMG would change to plastic from Aluminium? Was there other problems with those?
     
  16. DSM10000

    DSM10000 MB Club Veteran

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    Read the reply above.
     
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  17. OP
    OP
    Gnasher141

    Gnasher141 New Member

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    I’ve read it. The ones fitted to my engine are plastic and one has cracked, so I am asking why did they change from aluminium to plastic?

    Steve Says “The cam covers were changed to plastic on later cars, which don't suffer from fatigue cracks due to heavy heat cycling in the same way as aluminium.”
     
  18. markjay

    markjay MB Club Veteran

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    AMG were just following the trend.

    Quite a few manufactures moved from alloy rocker covers to plastic (composite material) ones in recent years.

    They offer significant weight reduction over alloy rocker covers, they are less prone to gasket leaks, and they reduce engine noise (and potentially may also be cheaper to make - I do not know).

    Some manufacturers also have now oil sumps made of composite material for the same reasons.
     
    Last edited: Mar 16, 2019
  19. Andy1a2b

    Andy1a2b Hardcore MB Enthusiast

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    VAG fit plastic sumps to the 2litre turbo engine in the Golf R and S3 , a few folk have holed them quite easily :(
     

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