Piston Ring Expander

This is a simple piston ring expander tool. It is designed for compression rings for pistons that are 98mm (3.85in), but I think it would work well on compression rings for a piston that is 85mm to 105mm (3.85 +/- 0.5 in)

The specific intended engine is the AMC/Jeep 4.0L straight 6. I think the pistons are the same size in the AMC/Jeep 2.5L straight 4, but I'm not positive.

There are four parts that snap together. The retaining ridge on each joint is significant, so you might have to tap t