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| After a comedy of errors on assembly (mix and match rod caps) everything was fine for a while. I turned up the pump a little to match my other truck and ran it for a while. Would you know the minute I let someone else use it to haul a little gravel (definitely not overloaded) it starts making a knock. After we tore it down I found the number 6 piston is 'grooved' (I think that's a step up from just scored - see pics). I can replace the cylinder and piston and put things together (probably new rod bears, piston rings, and just maybe a head gasket ;) But, what would have caused the scoring? I have not replaced the injectors on this motor - could they be leaking?
Thanks,
Pat
 (scored piston.jpg)
 (good piston.jpg)
Attachments
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 scored piston.jpg (85KB - 874 downloads)
good piston.jpg (80KB - 733 downloads)
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Scored piston on DT466?
