Dealer took valve cover off and found the push rods bent, and said that Perkins wants him to bring the tractor to Ft. Smith, AR to have the engine replaced or repaired. Dealer said may take month to six weeks to get tractor back. So I traded for the T554 yesterday. Waiting for the delivery today. Dealer gave good deal on the trade, and said he only wanted me to be happy... Best I understand Dealer thinks that it jumped time, and broke a gear on or around the the cam shaft, and that caused the damage. He said Perkins dealer said that they had another engine that did that, so really won't know for sure until they take engine apart... Hoping for the best on the new teir 4 yanmar engine..