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I have a 2005 John Deere Buck 650 4x4 and I'm reading that it's the same engine as the Quest. My bike's solenoid went out about 6 months ago and I just got around to changing it out. When I got it started I noticed there was an oil leak accompanied by a knocking noise. I fixed the oil sensor that was leaking but the knocking noise is still there. When I changed the oil I did notice metal shavings in the oil and on the oil filter. Any idea on what this could be or what I could be looking at to get it fixed? Any help is appreciated.

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Knocking  noises  and  metal in the  oil sounds like a very expensive rebuild  is in order.  It could be  from  the rod, or   the   wrist  pin  on the  piston  and if  either  let go most likely  it  will  destroy the  block too. I'd take it to  a shop to  be diagnosed.  If  it  breaks  it'll mean  an  entirely  new  motor  rather  than  a  $1000  + dollar  rebuild ..

 

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