Subaru 12013AB270 Piston Set RH

Install the new outer cir clip in the piston pin bore groove. Ensure that the cir clip is seated properly in the groove to avoid serious engine damage.

Needle-nose pliers.

Yes, the pistons can remain in the cylinder bores until the crankcase is separated. They can then be driven out with a wooden or plastic hammer handle, or they can be removed first.

Rotate the crankshaft until the number one and two connecting rods are at bottom dead center, aligning them with the center of the cylinder. Gently guide the number one piston into the cylinder, ensuring that the mark on the piston crown faces the front of the engine. Tap the exposed edge of the ring compressor to ensure contact with the crankcase. Carefully tap on the top of the piston with a wood or plastic hammer handle to push it into the cylinder, maintaining pressure on the ring compressor. If any resistance is felt, stop immediately and address the issue.