4 - 28ENGCYLINDER AND PISTONREMOVING THE PISTON1.Remove: Piston pin clips 1 Piston pin 2 Piston 3NOTE:Before removing piston pin, deburr the clipgroove and pin hole area. If the piston pingroove is deburred and the piston pin is stilldifficult to remove, use the piston pin puller 4.CAUTION:Do not use a hammer to drive the pistonpin out.Piston pin puller set:P/N. YU-01304, 90890-013042.Remove: Piston ringsNOTE:Spread the end gaps apart while at the sametime lifting the piston ring over the top of thepiston crown.CHECKING THE TIMING CHAIN GUIDE1.Check: Exhaust side timing chain guideWear/damage → Replace.CHECKING THE CYLINDER AND PISTON1.Check: Cylinder and piston wallsVertical scratches → Rebore or replace thecylinder and the piston. Cylinder water jacketMineral deposits/rust → Eliminate.
