Ring Gap Measurement; Compression Ring Installation; Piston Ring End Gap Position - Jeep Wrangler 1997 Manual

TJ
SERVICE PROCEDURES (Continued)
Ring Gap Measurement
Fig. 8 Gap Measurement
FEELER
GAUGE
Fig. 7 Ring Side Clearance Measurement
Top Compression Ring . . . . . . . . . 0.229 to 0.610 mm
(0 .0090 to 0.0240 inch)
Second Compresion Ring . . . . . . . .0.483 to 0.965 mm
(0 .0190 to 0.0380 inch)
Oil Control Ring . . . . . . . . . . . . . .0.254 to 1 .500 mm
(0 .010 to 0.060 inch)
805dd887
(5)
The oil control rings are symmetrical, no top or
bottom, install anyside up . It is not necessary to use
a tool to install the upper and lower rails. Insert
oil
rail spacer first, then side rails.
(6) The two compression rings are different and
cannot be interchanged . The TOP compression ring
2 .5L ENGINE 9 - 21
can be identified by the shiny coating on the outer
sealing surface. This ring is symmetrical, no top or
bottom, install anyside up .
(7) The second compression ring has a dot or drill
mark denoting the topside of ring . There is also a
slight chamfer on the inside bottom edge, therefore
dot mark up chamfer face down for installationon.
(8) Using a ring installer, install the second com-
pression ring. (Fig . 9) .
RING EXPANDER
RECOMMENDED
(9)
The top compression ring has a shiny coating
on the outer sealing surface.
(10) Using a ring installer, install the top ring .
(Fig . 9) .
(11) Position top and second ring 180° apart. Split
the oil rings 60° to 90° apart and away from the sec-
ond ring gap. (Fig . 10) Example: Top oil ring at
12 :00, expander at 3 :00 or 9:00, bottom oil ring at
6:00.
GAP OF
LOWER SIDE RAIL
Fig. 9 Compression Ring Installation
+
FRONT OF ENGINE
COMPRESSION
RING
Fig. 10 Piston Ring End Gap Position
J9009-47
NO . 2 RING GAP
GAP OF
AND SPACER
UPPER SIDE RAIL
EXPANDER GAP 9509-46