Jeep Wrangler 1997 Manual page 735

TJ
REMOVAL AND INSTALLATION (Continued)
(2)
Drain the cooling system . DO NOT waste reus-
able coolant. If the solution is clean, drain it into a
clean container for reuse.
(3) Remove the radiator or radiator and condenser,
if equipped with A/C (refer to Group 7, Cooling Sys-
tem for the proper procedure).
(4) Remove the air conditioner condenser and
receiver/drier assembly as a charged unit, if equipped
(refer to Group 24, Heating and Air Conditioning) .
(5) Remove the distributor cap and mark the posi-
tion of the rotor.
(6) Remove the distributor and ignition wires .
(7) Remove the engine cylinder head cover.
(8) Remove the rocker arms, bridges and pivots .
(9) Remove the push rods .
(10) Remove the engine cylinder head and gasket .
(11) Remove the hydraulic valve tappets from the
engine cylinder head .
(12) Remove the vibration damper .
(13) Remove the timing case cover.
(14) Remove the timing chain and sprockets .
(15) Remove the front bumper and/or grille, as
required .
(16) Remove the camshaft (Fig . 34) .
Fig. 34 Camshaft
CRANKSHAFT
J9009-31
INSTALLATION
(1)
Inspect the cam lobes for wear.
(2) Inspect the bearing journals for uneven wear
pattern or finish .
(3) Inspect the bearings for wear.
(4) Inspect the distributor drive gear for wear.
(5) If the camshaft appears to have been rubbing
against the timing case cover, examine the oil pres-
sure relief holes in the rear cam journal . The oil
pressure relief holes must be free of debris .
(6) Lubricate the camshaft with Mopar Engine Oil
Supplement, or equivalent.
(7) Carefully install the camshaft to prevent dam-
age to the camshaft bearings (Fig . 34) .
(8) Install the timing chain, crankshaft sprocket
and camshaft sprocket with the timing marks
aligned .
(9) Install the camshaft sprocket retaining preload
bolt . Tighten the bolt to 108 N-m (80 ft . lbs .) torque .
(10) Lubricate the tension spring, the thrust pin
and the pin bore in the preload bolt with Mopar
Engine Oil Supplement, or equivalent. Install the
spring and thrust pin in the preload bolt head .
(11) Install the timing case cover with a replace-
ment oil seal (Fig. 35) . Refer to Timing Case Cover
Installation .
(12) Install the vibration damper (Fig. 35) .
CRANKSHAFT
OIL SEAL
4.OL ENGINE 9 - 73
Fig. 35 Timing Case Cover Components
J9009-21
(13) Install the hydraulic valve tappets .
(14) Install the engine cylinder head.
(15) Install the push rods.
(16) Install the rocker arms and pivot and bridge
assemblies . Tighten each of the capscrews for each
bridge alternately, one turn at a time, to avoid dam-
aging the bridge .
(17) Install the engine cylinder head cover.
(18) Position the oil pump gear . Refer to Distribu-
tor in the Component Removal/Installation section of
Group 8D, Ignition Systems .
(19) Install the distributor and ignition wires .
Refer to Distributor in the Component Removal/In-
stallation section of Group 8D, Ignition Systems .
(20) Install the serpentine drive belt and tighten
to the specified tension (refer to Group 7, Cooling
System for the proper procedure) .
NOTE : During installation, lubricate the hydraulic
valve tappets and all valve components with Mopar
Engine Oil Supplement, or equivalent. The Mopar
Engine Oil Supplement, or equivalent must remain
with the engine oil for at least 1 609 km (1,000
miles) . The oil supplement need not be drained until
the next scheduled oil change.