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Old 10-24-2011, 12:46 AM   #1 (permalink)
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Clicking sound from crankcase

I'm currently rebuilding my 01 ski doo formula deluxe 600. With the cylinders off, if I take the rods and alternate them to turn the motor over, it makes a weird clicking noise. It sounds like a little metal ball rolling around in there.

The sound only comes up when I'm spinning the motor at a decent speed. I have used a magnet and compressed air and can't find anything. Is it possible the noise is coming from the flywheel side, possibly the stator? Is this a sign of a bad crank bearing? Thanks
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Old 10-24-2011, 02:23 AM   #2 (permalink)
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do some more inspection and think what can be wrong,it could just be somthing simple some times, if i were you i would look and do more research
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Old 10-24-2011, 06:13 AM   #3 (permalink)
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Is it coming from a particular side of the motor?
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Old 10-24-2011, 07:33 AM   #4 (permalink)
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I've seen this many times- a classic SkiDoo symptom. Rotax crank bearings have a phenolic (plastic) ball separator that can break apart after years of use. This allows the balls to roll freely in the bearing races and you can sometimes actually hear the balls as they are rolling and falling when the crank is turned by hand. Your bottom end has to come apart I'm sure.
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Old 10-24-2011, 11:31 AM   #5 (permalink)
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I can't pin point exactly where the sound is coming from. I'll make a video later of the sound and post it up. I wanna try and get by without pulling the crankcase apart as I don't have a flywheel or clutch puller.
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Old 10-24-2011, 11:48 AM   #6 (permalink)
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I've heard that exact sound a few times. Its a bad bearing that is missing a few balls i bet. You may have gotten a little lucky and the balls just got spit out out of the exaust. Make sure its not a clutch weight flopping around first.
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Old 10-24-2011, 11:50 AM   #7 (permalink)
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The clutch is off the motor. The clutch shaft is still on the end of the crank though. Looks like I'm gonna have to split the crankcase. Where can I get bearings for it?
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Old 10-24-2011, 12:11 PM   #8 (permalink)
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Your local SkiDoo dealer can get all the crank bearings. You will also need some Isoflex grease. If the bad bearing is one of the two on the inside of the crank you will have to take the crank to someone that can disassemble it and reassemble it correctly, not a job for the do it yourselfer.
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