Jeep Liberty KJ. Manual — part 877
CRANKSHAFT
DESCRIPTION
SPECIFICATION
Metric
Standard
Main Bearing Journal Diameter
63.488 - 63.512 mm
2.4996 - 2.5005 in.
Bearing Clearance
0.002 - 0.046 mm
0.00008 - 0.0018 in.
Out of Round (MAX)
0.005 mm
0.0002 in.
Taper (MAX)
0.006 mm
0.0004 in.
End Play
0.052 - 0.282 mm
0.0021 - 0.0112 in.
End Play (MAX)
0.282 mm
0.0112 in.
Connecting Rod Journal Diameter
57.908 - 57.892 mm
2.2798 - 2.2792 in.
Bearing Clearance
0.006 - 0.044
0.0002 - 0.0011 in.
Out of Round (MAX)
0.005 mm
0.0002 in.
Taper (MAX)
0.006 mm
0.0002 in.
CAMSHAFT
DESCRIPTION
SPECIFICATION
Metric
Standard
Bore Diameter
26.02 - 26.04 mm
1.0245 - 1.0252 in.
Bearing Journal Diameter
25.975 - 25.995 mm
1.0227 - 1.0235 in.
Bearing Clearance
0.025 - 0.065 mm
0.001 - 0.0026 in.
Bearing Clearance (MAX)
0.065 mm
0.0026 in.
End Play
.075 - .200 mm
0.003 - 0.0079 in.
End Play (MAX)
.200 mm
0.0079 in.
VALVE TIMING
DESCRIPTION
SPECIFICATION
Intake
Opens (BTDC)
5.6°
Closes (ATDC)
240.1°
Duration
245.7°
Exhaust
Opens (BTDC)
241.5°
Closes (ATDC)
20.1°
Duration
261.6°
Valve Overlap
25.7°
VALVES
9 - 1466
ENGINE - 3.7L
KJ
DESCRIPTION
SPECIFICATION
Metric
Standard
Face Angle
45° - 45.5°
Head Diameter
Intake
48.52 - 48.78 mm
1.9103 - 1.9205 in.
Exhaust
36.87 - 37.13 mm
1.4516 - 1.4618 in.
Length (Overall)
Intake
113.45 - 114.21 mm
4.4666 - 4.4965 in.
Exhaust
114.92 - 115.68 mm
4.5244 - 4.5543 in.
Stem Diameter
Intake
6.931 - 6.957 mm
0.2729 - 0.2739 in.
Exhaust
6.902 - 6.928 mm
0.2717 - 0.2728 in.
Stem-to-Guide Clearance
Intake
0.018 - 0.069 mm
0.0008 - 0.0028 in.
Exhaust
0.047 - 0.098 mm
0.0019 - 0.0039 in.
Max. Allowable Stem-to-Guide
Clearance (Rocking Method)
Intake
0.069 mm
0.0028 in.
Exhaust
0.098 mm
0.0039 in.
Valve Lift (Zero Lash)
Intake
12.00 mm
0.472 in.
Exhaust
12.00 mm
0.472 in.
VALVE SPRING
DESCRIPTION
SPECIFICATION
Metric
Standard
Free Length (Approx)
Intake
48.18 mm
1.896 in.
Exhaust - w/damper
48.2 mm
1.897 in.
Spring Force (Valve Closed)
Intake
332.0 - 368.0 N @ 40.12 mm
74.63 - 82.72 lbs. @ 1.5795 in.
Exhaust - (without damper)
356 - 394 N @ 39.12 mm
80.031 - 88.57 lbs. @ 1.54 in.
Spring Force (Valve Open)
Intake
948.0 - 1038.0 N @ 28.12 mm
213.2 - 233.8 lbs. @ 1.107 in.
Exhaust - without damper
974 - 956 N @ 27.12 mm
218.8 - 215.1 lbs. @ 1.067 in.
Number of Coils
Intake
7.30
Exhaust
7.15
Wire Diameter
Intake
4.77 × 3.80mm
0.1878 × 0.1496 in.
KJ
ENGINE - 3.7L
9 - 1467
Exhaust
4.66 × 3.72mm
0.1843 × .1464 in.
Installed Height (Spring Seat to
Bottom of Retainer)
Nominal
Intake
40.12 mm
1.579 in.
Exhaust - w/damper
40.12 mm
1.579 in.
CYLINDER HEAD
DESCRIPTION
SPECIFICATION
Metric
Standard
Gasket Thickness (Compressed)
0.7 mm
(0.0276 in.)
Valve Seat Angle
44.5° - 45.0°
Valve Seat Runout (MAX)
0.051 mm
0.002 in.
Valve Seat Width
Intake
1.75 - 2.36 mm
0.0698 - 0.0928 in.
Exhaust
1.71 - 2.32 mm
0.0673 - 0.0911 in.
Guide Bore Diameter (Std.)
6.975 - 7.00 mm
0.2747 - 0.2756 in.
Cylinder Head Warpage (Flatness)
0.0508 mm
0.002 in.
OIL PUMP
DESCRIPTION
SPECIFICATION
Metric
Standard
Clearance Over Rotors/End Face
(MAX)
0.095 mm
0.0038 in.
Cover Out - of -Flat (MAX)
0.025 mm
0.001 in.
Inner and Outer Rotor Thickness
12.02 mm
0.4731 in.
Outer Rotor to pocket (Diametral)
clearance (MAX)
.235 mm
.0093 in.
Outer Rotor Diameter (MIN)
85.925 mm
0.400 in.
Tip Clearance Between Rotors
(MAX)
0.150 mm
0.006 in.
OIL PRESSURE
SPECIFICATION
SPECIFICATION
Metric
Standard
At Curb Idle Speed (MIN)*
25 kPa
4 psi
@ 3000 rpm
170 - 758 kPa
25 - 110 psi
* CAUTION: If pressure is zero at curb idle, DO NOT run engine at 3000 rpm.
9 - 1468
ENGINE - 3.7L
KJ
SPECIAL TOOLS
3.7L ENGINE
Spanner Wrench 6958
Adapter Pins 8346
Front Crankshaft Seal Remover 8511
Front Crankshaft Seal Installer 8348
Handle C-4171
Rear Crankshaft Seal Installer 8349
Rear Crankshaft Seal Remover 8506
Connecting Rod Guides 8507
KJ
ENGINE - 3.7L
9 - 1469
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