2002 JEEP LIBERTY 3.7 v6

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Page 1223 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual CONDITION POSSIBLE CAUSES CORRECTION
OIL PUMPING AT RINGS; SPARK
PLUGS FOULING1. Worn or damaged rings. 1. Hone cylinder bores and replace
rings.
2. Carbon in oil ring slots. 2. Replace rings (Refer t

Page 1224 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual CYLINDER COMBUSTION PRESSURE LEAKAGE DIAGNOSIS CHART
CONDITION POSSIBLE CAUSE CORRECTION
AIR ESCAPES THROUGH
THROTTLE BODYIntake valve bent, burnt, or not
seated properlyInspect valve and valve seat.

Page 1225 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual ²Tapping the hole with a special Heli-Coil Tap, or
equivalent.
²Installing an insert into the tapped hole to bring
the hole back to its original thread size.
STANDARD PROCEDURE - ENGINE CORE AND
OIL

Page 1226 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual NOTE: Recheck bolt torque for engine lift plate
before removing engine.
(30) Secure the left and right engine wiring har-
nesses away from engine.
(31) Raise vehicle.
(32) Disconnect oxygen sensor wir

Page 1227 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual (35) Install the mechanical cooling fan.
(36) Install the fan shroud with the electric fan
assembly.
(37) Install the radiator core support bracket.
(38) Install the air cleaner assembly.
(39) Refill

Page 1228 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual DESCRIPTION SPECIFICATION
PISTONS
Material Aluminum Alloy
Diameter 92.975 mm (3.6605 in.)
Weight 367.5 grams (12.96 oz)
Ring Groove Diameter
No. 1 83.73 - 83.97 mm
(3.296 - 3.269 in.)
No. 2 82.833 - 8

Page 1229 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual DESCRIPTION SPECIFICATION
VALVE TIMING
Intake
Opens (ATDC) 3.6É
Closes (ATDC) 247.1É
Duration 243.5É
Exhaust
Opens (BTDC) 232.5É
Closes (ATDC) 21.2É
Duration 253.70É
Valve Overlap 17.6É
VA LV E

Page 1230 of 1803

JEEP LIBERTY 2002 KJ / 1.G Workshop Manual DESCRIPTION SPECIFICATION
Cylinder Head Warpage
(Flatness) 0.0508 mm (0.002 in.)
OIL PUMP
Clearance Over
Rotors/End Face(MAX)0.035 - 0.095 mm
(0.0014 - 0.0038 in.)
Cover Out - of -Flat
(MAX)0.025 mm (