Jeep Cherokee 2000 Service Manual - page 1054
(7) The second compression ring has a slight
chamfer on the bottom of the inside edge and a dot
on the top for correct installation (Fig. 25).
(8) Using a ring installer, install the second com-
pression ring with the dot facing up (Fig. 25) (Fig.
27).
(9) Using a ring installer, install the top compres-
sion ring (either side up).
Ring Gap Orientation
•
Position the gaps on the piston as shown (Fig.
28).
•
Oil spacer - Gap on center line of piston skirt.
•
Oil rails - gap 180° apart on centerline of piston
pin bore.
•
No. 2 Compression ring - Gap 180° from top oil
rail gap.
•
No. 1 Compression ring - Gap 180° from No. 2
compression ring gap.
Fig. 22 Ring Side Clearance Measurement
1 – FEELER GAUGE
RING SIDE CLEARANCE CHART
ITEM
SPECIFICATION
Top Compression Ring
0.042 - 0.084 mm
(0.0017 - 0.0033 in.)
Second Compression
Ring
0.042 - 0.084 mm
(0.0017 - 0.0033 in.)
Oil Control Ring
0.06 - 0.21 mm
(0.0024 - 0.0083 in.)
Fig. 23 Gap Measurement
1 – FEELER GAUGE
RING GAP MEASUREMENT CHART
ITEM
SPECIFICATION
Top Compression Ring
0.229 - 0.610 mm
(0.0090 - 0.0240 in.)
Second Compression
Ring
0.483 - 0.965 mm
(0.0190 - 0.080 in.)
Oil Control Ring
0.254 - 1.500 mm
(0.010 - 0.060 in.)
Fig. 24 Top Compression ring identification
1 – TOP COMPRESSION RING
XJ
4.0L ENGINE
9 - 79
SERVICE PROCEDURES (Continued)