Jeep Cherokee 2000 Service Manual - page 747
DESCRIPTION
SPECIFICATION
Flatness Max
0.20 mm for total length
(0.008 in. for total length)
Main Bearing Bore
Diameter
68.3514 to 68.3768 mm
(2.691 to 2.692 in.)
CONNECTING RODS
Total Weight (Less
Bearing)
663 to 671 grams
(23.39 to 23.67 oz.)
Length (Center to Center)
155.52 to 155.62 mm
(6.123 to 6.127 in.)
Piston Pin Bore Diameter
23.59 to 23.62 mm
(0.9288 to 0.9298 in.)
Bore (Less Bearings)
56.08 to 56.09 mm
(2.2080 to 2.2085 in.)
Bearing Clearance
0.025 to 0.076 mm
(0.001 to 0.003 in.)
Bearing Clearance
(Preferred)
0.044 to 0.050 mm
(0.0015 to 0.0020 in.)
Side Clearance
0.25 to 0.48 mm
(0.010 to 0.019 in.)
Twist (Max)
0.002 mm per mm
(0.002 in. per in.)
Bend (Max)
0.006 mm per mm
(0.006 in. per inch.)
CYLINDER HEAD
Combustion Chamber
49.9 to 52.9 cc
(3.04 to 3.23 cu. in.)
Valve Guide I. D.
(Integral)
7.95 to 7.97 mm
(0.313 to 0.314 in.)
Valve Seat Angle
Intake
44.5°
Exhaust
44.5°
Valve Seat Width
1.01 to 1.52 mm
(0.040 to 0.060 in.)
DESCRIPTION
SPECIFICATION
Valve Seat Runout
0.064 mm
(0.0025 in.)
Flatness
0.03 mm per 25 mm
(0.001 in. per 1 in.)
0.05 mm per 152 mm
(0.002 in. per 6 in.)
Flatness (Max)
0.20 mm for total length
(0.008 in. for total length)
ROCKER ARMS, PUSH RODS & TAPPETS
Rocker Arm Ratio
1.6:1
Push Rod Length (Blue)
241.300 to 241.808 mm
(9.500 to 9.520 in.)
Push Rod Diameter
7.92 to 8.00 mm
(0.312 to 0.315 in.)
Hydraulic Tappet
Diameter
22.962 to 22.974 mm
(0.904 to 0.9045 in.)
Tappet to Bore Clearance
0.025 to 0.063 mm
(0.001 to 0.0025 in.)
PISTON
Weight (Less Pin)
417 to 429 grams
(14.7 to 15.1 oz.)
Compression Height
40.61 to 40.72 mm
(1.599 to 1.603 in.)
Piston to Bore Clearance
0.018 to 0.038 mm
(0.0008 to 0.0015 in.)
Piston Ring Groove
Height
Compression Rings
1.530 to 1.555 mm
(0.0602 to 0.0612 in.)
Oil Control Ring
4.035 to 4.060 mm
(0.1589 to 0.1598 in.)
Piston Ring Groove
Diameter
Compression Ring #1
88.39 to 88.65 mm
(3.48 to 3.49 in.)
Compression Ring #2
87.63 to 87.88 mm
(89.66 to 89.92 in.)
XJ
2.5L ENGINE
9 - 57
SPECIFICATIONS (Continued)