Jeep 1987 Wrangler Workshop Manual page 379

ENGINES JP1
4.2 LITER (258 CID) SIX-CYLINDER ENGINE
Connect the E G R valve tube (1) to the intake
manifold.
2
Connect the coolant hoses to the intake
manifold.
Connect the vacuum hose to the E G R valve.
Connect the throttle cable and the PCV valve
hose. Connect the throttle valve rod retainer and
spring.
Install the air cleaner.
Refill the cooling system with coolant.
If replacement coolant is being used, ensure
that the mixture of antifreeze and low mineral
content water is acceptable for the climate.
WARNING: Use extreme caution when the
engine is operating. Do not stand in a direct line
with the fan. Do not put your hands near the
pulleys, belts or fan. Do not wear loose clothing.
Start the engine and inspect for leaks. Repair as
necessary.
EXHAUST MANIFOLD REMOVAL
Remove the intake manifold. Refer to Intake
Manifold Removal for the procedure.
Disconnect the exhaust pipe from the exhaust
manifold (1).
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Disconnect the oxygen sensor wire connector
and remove the sensor (2) from the exhaust
manifold.
Remove the nuts from the end studs and
remove the exhaust manifold.
Clean the mating surfaces of the cylinder head
and the manifold if the original manifold is to be
installed.
B-145