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W123 OM617 “Knock”?

  #1  
Old 12-27-2017, 12:18 AM
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Default W123 OM617 “Knock”?

I have an OM617 that has developed an odd kinda metallic clank at certain RPMs. I’ve looked but haven’t been able to find anything online like what I’m hearing. Runs fine otherwise just at about quarter throttle it randomly clanks. Valve hitting the piston? Injector? I used a stethoscope and narrowed it down to cylinder #2, definitely top end of engine.
 
  #2  
Old 12-27-2017, 12:20 AM
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Originally Posted by chathamwill View Post
I have an OM617 that has developed an odd kinda metallic clank at certain RPMs. I’ve looked but haven’t been able to find anything online like what I’m hearing. Runs fine otherwise just at about quarter throttle it randomly clanks. Valve hitting the piston? Injector? I used a stethoscope and narrowed it down to cylinder #2, definitely top end of engine.
 
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