Here is 2008 Dodge Crew Cab 3500HD Laramie Package 4WD Leather Loaded truck I just purchased with a BAD 6.7 Cummins with only 217K miles. The engine has a BAD rod knock. Dixie Diesel here in Tennessee evaluated the truck for the previous owner who is a friend of mine. Engine is bad and needs rebuilt/replaced. Apparently there is an oiling problem with the rods that can cause a rod knock if the truck engine oil is not religiously serviced. This truck was properly serviced with the receipts to prove it from new! $11k for a new engine, $8K-$10K for a rebuild/reman engine. I have found a 28K mile used engine with a 1 year unlimited mileage parts warranty for $5K + $1,200 labor for swap + $300 for fluids, filters and BS. On the short end this will be $6,500-$7K repair if all goes well!
Truck is worth $18K-$20K repaired. My friend the owner wrote a $5K check to sell the truck to me to payoff the loan he had on the truck as he was done with the truck and said that was the BEST $5K he had ever spent. He purchased the truck with 120K miles. He owns a concrete pumping business and on occasion pulled a 1 car trailer. He WAS a Dodge man who now is driving a 2014 Ford crew cab diesel. Truck has 4 new $1200 Hankook
tires AND a rebuilt billet upgraded automatic transmission that was replaced last year to the tune of $4,000! So much for service by the manufacturer's book!
I too am taking a chance on this diesel truck. Wish me luck with this adventure as Diesel trucks get EXPENSIVE really fast!