2nd Gen R56 Cooper S Most liked posts in thread: '09 S wont start

  1. ColinGreene

    ColinGreene Well-Known Member
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    #4 ColinGreene, Aug 20, 2015
    Timing chain slipped will be my first thought.
     
  2. fallentrance

    fallentrance New Member

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    #13 fallentrance, Aug 21, 2015
    Thanks guys, i dont think ill need pictures, but its good knowing in advance. But before i get to the Cooper S, i need to fix the powersteering on my R50 Cooper. Powersteering is like gone on it. If i recall there was a recall for the powersteering. Oh Boy. After i fix that ill jump to the Cooper S!

    [​IMG]



    And here is what the Cooper S looks like.

    [​IMG]
     
  3. fallentrance

    fallentrance New Member

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    #14 fallentrance, Nov 27, 2020
    Update? It's finally running after 5 years, to everyone who chimed in much appreciation.

    The Culprit?

    The timing chain tensioner literally just snapped which is common, which led to the exhaust side valves all to bend. I was able to salvage the head and get it repaired (phew), all new valves, etc. Here is a picture of the exhaust side valve, that shouldn't look like that ha!

    21457678_483415595347045_5920000986246763356_o.jpg

    Here is a couple rev's. Whats left? Put the front end back together, figure out why my rear brake lines are leaking, and get an alignment and should be all set to go back on the road!

     
  4. Steve

    Steve Administrator
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    #2 Steve, Aug 20, 2015
    I'm no help with your engine/starting issue but I can fix this. :Thumbsup:
     
  5. Systemlord

    Systemlord New Member

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    #7 Systemlord, Aug 20, 2015
    The first thing I would do is remove the valve cover and check the timing chain guides for cracks and damage, then I would look to see if the flat spots (located on the end of the cams near the HPFP and vacuum pump) on the exhaust and intake cam are properly aligned. You should be able to see with the naked eye if there off by more than a few teeth which would seem likely if your timing chain if off enough to cause starting problems, if it's difficult to tell then you might not be off by to much. If your not off by much your pistons and valves might be alright. Torque specs for the valve cover is 10Nm or 7.3 ft-lbs.
     
  6. MCS02

    MCS02 Moderator
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    #8 MCS02, Aug 20, 2015
    Welcome to MA!

    What they said
     
  7. 00Mini

    00Mini Well-Known Member

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    #9 00Mini, Aug 20, 2015
    Welcome to Motoring Alliance !! It looks like your getting some pretty sound advice to your question. Good luck with your repairs.
     
  8. Eric@Helix

    Eric@Helix New Member
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    #12 Eric@Helix, Aug 21, 2015
    First, scan the car for stored error codes. Then, check the timing chain guides. If they're bad, you should change the whole timing set as opposed to replacing parts a la carte.
     
  9. Zapski

    Zapski Well-Known Member

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    #3 Zapski, Aug 20, 2015
    I have no ideas for you, but Welcome to the site.

    Here's a free bump.
     
  10. fallentrance

    fallentrance New Member

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    #5 fallentrance, Aug 20, 2015
    Thanks, ill look into that!

    Thanks for the welcome!

    Thanks :Thumbsup:
     
  11. Metalman

    Metalman Well-Known Member
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    #6 Metalman, Aug 20, 2015
    Would the jumping of one gear tooth cause the valves to hit the pistons?
     
  12. fallentrance

    fallentrance New Member

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    #10 fallentrance, Aug 20, 2015
    Thank you very much!
     
  13. Systemlord

    Systemlord New Member

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    #11 Systemlord, Aug 20, 2015
    You are welcome, if you need pictures of the cams flat spots I can provides picture and YouTube videos showing you where that are located when I get home from work tonight. If you are off by a couple of teeth I would recommend getting ahold of a bore scope and looking into the cylinders to see if the valves struck the pistons, if they did you will see these half moon shaped marks either on the intake valve side of the piston or the exhaust side. If there minor marks they might need to be filed or polished out because they might create hotspots while driving causing pri-ignition. We I mean I'm getting a little ahead of myself so let's see what the timing chain, guides and cams have to say about it before we go too much into that.
     
  14. 00Mini

    00Mini Well-Known Member

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    #15 00Mini, Nov 27, 2020
    Glad you were able to get the problem corrected and your original exhaust valves will make interesting conversation pieces.
     
  15. MCS02

    MCS02 Moderator
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    #16 MCS02, Nov 28, 2020
    Wow glad you got it back on the road