Page 12 of JE Pro Seal Catalog by JE Pistons

13 Top Oil Ring Rail Oil Ring Bottom Oil Ring Rail Rail Notch Oil Drain Back Figure 6 Example: Subaru Top of Engine Figure 7 Rail End Gaps Locate End Gap Here Top View Wrist Pin Rail Wrist Pin Side View Rotational Locking Detent Axial Clearance .001"-.002" Back Clearance .005" min. When ring is contacting the back of the groove, the ring face must not protrude past the piston lands axial clearance less than .001" requires top ring groove coating Radial Width Axial Height Engine Front Bottom Oil Ring Rail Gap Wrist Pin Centerline Top Compression Ring Gap Oil Ring Expander Gap Range 2nd Compression Ring Gap Top Oil Ring Rail Gap Detent RING INSTALLATION Check each ring in its corresponding piston groove to ensure proper axial and radial clearance (fig. 1 2) Always install Pro Seal rings with indicator marks facing up (Sportsman rings without indicator should be installed as shown in fig. 3) Always use a ring expander when installing rings (see photos) Spiraling rings into ring grooves can damage both the ring and piston ring groove Lubricate new rings with light assembly oil or motor oil before installation Stagger end gaps on each compression ring, oil rails and expanders (fig. 4) RAIL SUPPORTS JE Pro Seal rail supports feature a special locking detent to prevent rotation of the oil rail. This detent should be positioned directly in line with the wrist pin (fig. 5). Keep the rail support gap 90 from the wrist pin bore opening. RING SETS CONTAINING OIL RAILS WITH A TAB When installed in a horizontally opposed engine, rail gaps should be installed as shown below (fig. 7). The rail tab must be installed below the oil ring expander with the tab facing toward the bottom of the ring groove extending into the split oil drain back hole (fig. 6). Use caution to not install the rail tab into the wrist pin oil hole. Figure 2 Top ring with indicator Sportsman Top ring, install with bevel facing up Figure 3 Figure 5 Figure 4 Figure 1 Ring Expander Ring Expander RING INSTALLATION

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