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bmk

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    2009 Griso 8V SE

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  1. bmk

    bmk

  2. Hi Pete, Good description, but the one thing you haven't really made clear in relation to this particular failure is that the big end cap was assembled onto the rod the wrong way round. This is significant as the big end journal is machined into the rod with the cap in place and then marked. Assembling it incorrectly will then automatically lead to the factors you describe above as the hole in the big end is no longer round. It may be only very slightly out of round but as you point out it only takes a little oil behind the bearing to start the process.
  3. Hi Pete, I can see where you're going with this, but having seen the damage, it's not the case here. The bearing spun eventually because of wear, the bearing itself is extremely worn and has been hammered out of shape by the crank, allowing it to eventually spin. As I said in an earlier post, the mains and rh cylinder journal are all totally unmarked and as you would expect. As with all wear you will get to a point at which the clearances will suddenly accelerate and thus cause failure, which is what seems to have happened here.
  4. Hi Baldini, All I know of the previous work is what the last owner told me, which was that the engine and gearbox had had a repint and that there was some recall work done to the engine. Other than that I don't know any more as to what was involved in carrying out the work.
  5. Hi all, Well, I've been into see the engine stripped at the dealers today, and basically the fault is due to human error whan the engine was built. The big end bearing has spun in the con rod of the left hand cylinder. The other big end and main bearing journals are all ok. What the technician found was that the big end cap had been put on the con rod the wrong way round. This was an engine failure waiting to happen it seems. The man from Moto Guzzi has been in to see it and taken photo's and is submitting the warranty claim to the factory along with his report. I may know more next week. Whilst not good news, I am at least re-assured that this wasn't the fault of some inherent weakness in the engine or manufacture, but down to human error on the part of the engine builder, Luigi.
  6. No oil light came on, oil level was fine. Dealer has said bearings have spun in the rods, not seen the bits myself yet.
  7. Hi all, Spoke with the dealer today and the latest news is that they have strpped the engine and it needs a new crank, con rods and bearings. Apparently, the bearings have spun in the rods, but only the bottom end ahs been affected, bores, valve gear etc is all ok. I'm hoping to get over and look at the engine in the next few days. Thanks for all the feed back.
  8. Hi tdurik, Thanks for the input, a specialist dealer suggested the alternator nut, and I already tried it - it's tight. Also lifted the valve covers and everything looked ok in there. I've trailered it to the dealer today, so I'll just have to wait and see. Thanks for all the input. Martin
  9. Hi, New to the forum. Have just got a 2003 V11 Sport, 3,500 miles, one previous owner. Bike has had repaint of engine and gearbox done, and gearbox recall. I have only done 110 miles on the bike, returning home after a ride out today, engine lost power and started rattling and now has what I would describe as a serious sounding, heavy knocking from the engine. All this happened a mile and half from home, after an uneventful, enjoyable sixty mile trip. The bike is still under warranty until September. Does anybody know if this is a one off or has it happened before, if so is it as terminal as it sounds? Cheers, Martin
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