582 Blue Head Failure follow up
582 Blue Head Failure follow up
OK, its my blue head that Ron posted about, and as I just got back from having it checked, I thought I'd let you know what was found. First, many thanks to Ultracruiser (aka Barry, or Beemerboy....) and Gyroron for their help. I might still be out in that field if it wasn't for them.
Turns out Phantom has it pretty much nailed. It was a big end rod bearing failure. Needle bearings looked okay. No indication of lubrication failure in either cylinder. The seizure happened quickly and the tech was surprised at how little damage was done (other than the hole in the crank case). Heads looked good and only need a little work, cylinders still look pretty good. The PTO piston that seized didn't look as bad as I, or the tech, thought it might. Tech was also surprised that no damage done to rotary valve, indicating that little to nothing was spit back into the carbs. I had gone back and checked the carbs, expecting to find that the PTO carb was hung up in some way, causing the throttle cable to be off. Carbs look okay, and slides work as they should. The tech didn't feel that he could tell why the bearing seized. In internet searches, I have found quite a few similar incidents of rod bearings seizing.
thanks for all the input.
Bernard