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Does my piston need to be replaced?

tanner23456tanner23456 Member Posts: 7
edited May 2018 in Mitsubishi
My engine has been knocking for some time now, I finally figured out the head gasket had blown between two cylinders. I got down to the head gasket today and my analysis was confirmed. Unfortunately, when I took the cylinder head off, I noticed damage to the piston, though there was no debris present. I assume this means this has been true since the previous owners. Judging from this picture, does the piston need to be replaced?


  • thecardoc3thecardoc3 Member Posts: 5,747
    That piston damage is only part of the picture. You not only need to replace the piston, you need the cylinder wall inspected by a machinist. You also need the connecting rod checked and it would not be a surprise if this has also suffered rod bearing damage.
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