Jeep 1987 Wrangler Workshop Manual page 372

(IPS
ENGINES
4.2 LITER (258 CID) SIX-CYLINDER ENGINE
Install the push rods (1).
Install the rocker arms (2) and pivot (3) and
bridge (4) assemblies. Tighten each of the two
capscrews (5) for each bridge alternately, one
turn at a time, to avoid damaging the bridge.
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NOTE: Lubricate the hydraulic valve tappets
and all valve actuating components with AMC
Engine Oil Supplement (EOS), or equivalent,
during installation. The E O S must remain with
the engine oil for at least 1 609 km (1,000 mi) but
need not be drained until the next scheduled oil
change.
Install the cylinder head cover. Refer to Cylinder
Head Cover Installation for the procedure.
Install the A/C condenser and receiver/drier
assembly, if equipped. Refer to Chapter L -
Heating and Air Conditioning for additional
information pertaining to the A/C system.
CAUTION: Both service valves must be opened
before the air conditioning system is operated.
Install the radiator, connect the hoses and fill the
cooling system to the specified level. Refer to
the Cooling Systems section.
C h e c k the ignition timing and adjust a s
necessary.
Install the grille and bumper, if removed.
Camshaft Pin Replacement
Disconnect the battery negative cable.
W A R N I N G : Do not l o o s e n the radiator
draincock with the system hot and pressurized
because serious burns from coolant can occur.
Drain the radiator.
NOTE: Do not waste reusable coolant. Drain the
coolant into a clean container.
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