The 6.5 Detroit Diesel designed engine had faulty harmonic balancers, which caused the cranks to break soon after the balancers failed. The balancers became a maintenance item after the failures were determined to have caused the cranks to break.
I have 2 trucks with 6.5 engines, both over 250,000 miles, not buying that they can't run reliably if the balancers problems are addressed. JMO.
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Brad Yost
1973 T/A (SOLD)
2005 GTO
1984 Grand Prix
100% Pontiacs in my driveway!!! What's in your driveway?
If you don't take some of the RACETRACK home with you, Ya got cheated 
  
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