Exhaust Manifold-Removal And Installation; Exhaust Manifold Mounting Details; Intake And Exhaust Manifold Bolt Tightening Sequence; Cylinder Head-Removal And Installation - Jeep cherokee 1989 Owner's Manual

7.9 Remove the old intake manifold gasket with a scraper
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don't leave any material on the mating surfaces
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8 Exhaust manifold removal and installation
Refer to illustration 8.5
Warning: Allow the engine to cool to room temperature before following
this procedure.
1 Remove the intake manifold (see Section 7).
2 Disconnect the EGR tube (see Chapter 6).
3 Remove the t w o nuts and bolts that secure the exhaust pipe to
the exhaust manifold. It may be necessary to apply penetrating oil t o
the threads.
4 Unplug the oxygen sensor wire connector (see Chapter 1, if
necessary
5 Remove the mounting nuts and spacers (see illustration) and detach
the exhaust manifold from the engine.
6 Clean the mating surfaces and, if the manifold is being replaced,
transfer the oxygen sensor to the new manifold.
7 Reinstall the exhaust manifold and finger tighten the nuts on the
end studs.
8 Reinstall the intake manifold (see Section 7) and tighten all mount-
ing fasteners to the specified torque, following the sequence shown
in illustration 7.1 2. Reinstall the remaining components in the reverse
order of removal.
9 Run the engine and check for exhaust leaks.
SPACER
8.5

Exhaust manifold mounting details

The Motor Manual Guy
Chapter 2 Part A
Four-cylinder engine
9 Cylinder head
Refer to illustrations 9.9 and 9.15
Warning: Allow the engine to cool to room temperature before following
this procedure.
1
2
3
4
without disconnecting the hoses.
5
conditioning compressor/alternator bracket to the cylinder head, then
unbolt the compressor/alternator bracket from the engine. Set the com-
pressor aside without disconnecting the hoses.
6
ing unit on the cylinder head.
7
8
the engine. If the head is stuck to the engine block, it may be necessary
t o tap it with a soft-face hammer or a block of wood and a hammer
t o break the seal.
9
gasket surfaces, removing all traces of gasket material. Run an ap-
propriate sized tap into the bolt holes in the cylinder head and run a
die over the bolt threads (see illustration). Ensure all bolt holes are clean
and dry.

7.12 Intake and exhaust manifold bolt tightening sequence

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removal and installation
Remove the rocker arms and pushrods (see Section
Remove the intake and exhaust manifolds (see Sections 7 and
Remove the drivebelt(s) as described in Chapter 1.
Unbolt the power steering pump (if equipped) and set
On air conditioned models, remove the bolt that secures the air
Label, then disconnect the wire from the coolant temperature send-
Label the spark plug wires and remove the spark plugs.
Remove the ten bolts that secure the cylinder head and lift it off
Stuff clean shop towels into the cylinders. Thoroughly clean the
9.9 A die should be used t o remove sealant and corrosion
from the head bolt threads
2A-7
INTAKE
MANIFOLD
aside
it