Crown Automotive 4798878010 Engine Piston Ring Set .010 Over for 97-06 Jeep Wrangler TJ; 96-01 Cherokee XJ and 96-04 Grand Cherokee ZJ & WJ with 4.0L 6 Cylinder Engine

Name: Crown Automotive Engine Piston Ring Set for 97-06 Jeep Wrangler TJ; 96-01 Cherokee XJ and 96-04 Grand Cherokee ZJ & WJ with 4.0L 6 Cylinder Engine .010 Over for 97-06 Jeep Wrangler TJ; 96-01 Cherokee XJ and 96-04 Grand Cherokee ZJ & WJ with 4.0L 6 Cylinder Engine
Brand: Crown Automotive

Question

Luis Jose G.

3/26/2024

I would like to know what the dimensions of the rings are since I bought a set of rings and they do not fit into the piston groove.

Answer 1

Standard Size:
Bore Diameter: 3.875 inches (98.425 mm) or 98.43 mm (as seen in some listings, which could be a slight rounding difference). This is the diameter of the piston they are designed to fit.
Top Ring Thickness: 1.5 mm
Second Ring Thickness: 1.5 mm
Oil Ring Thickness: 4.0 mm

For the Oversized: 1.5mm (top), 1.5mm (second), and 4.0mm (oil) in thickness, designed for a 3.885 inch (98.685 mm) bore (0.010 inch oversized).