Intake Manifold-Removal And Installation - Jeep cherokee 1989 Owner's Manual

2A-6
6.9 Once the spring is depressed, the kee
removed with a small magnet or needle-nose pliers (a
magnet is preferred t o prevent dropping the keepers)
valves to prevent parts and tools from falling into the engine, then use
a valve spring compressor to compress the spring. Remove the keepers
with small needle-nose pliers or a magnet (see illustration). Note: A
couple of different types of tools are available for compressing the valve
springs with the head in place. One type grips the lower spring coils
and presses on the retainer as the knob is turned, while the other type,
shown here, utilizes the rocker arm capscre w for leverage. Both types
work very well, although the lever type is usually less expensive.
10 Remove the spring retainer, oil shield and valve spring, then remove
the guide seal. Note: If airpressure fails to hold the valve in the closed
position during this operation, the valve face and/or seat is probably
damaged. If so, the cylinder head will have to be removed for addi-
tional repair operations.
11 Wrap a rubber band or tape around the top of the valve stem so
the valve won't fall into the combustion chamber, then release the air
pressure. Note: If a rope was used instead of air pressure, turn the
crankshaft slightly in the direction opposite normal rotation.
12 Inspect the valve stem for damage. Rotate the valve in the guide
and check the end for eccentric movement, which would indicate that
the valve is bent.
13 Move the valve up-and-down in the guide and make sure
bind. If the valve stem binds, either the valve is bent or the guide is
damaged. In either case, the head will have t o be removed for repair.
1 4 Reapply air pressure to the cylinder to retain the valve in the closed
position, then remove the tape or rubber band from the valve stem.
If a rope was used instead of air pressure, rotate the crankshaft in the
normal direction of rotation until slight resistance is felt.
15 Lubricate the valve stem with engine oil and install a new guide seal.
1 6 Install the spring and shield in position over the valve.
17 Install the valve spring retainer. Compress the valve spring and
carefully position the keepers in the groove. Apply a small dab of grease
to the inside of each keeper to hold it in place (see illustration).
18 Remove the pressure from the spring tool and make sure the
keepers are seated.
19 Disconnect the air hose and remove the adapter from the spark
plug hole. If a rope was used in place of air pressure, pull it out of the
cylinder.
2 0 Refer to Section 5 and install the rocker arm(s) and pushrod(s).
21 Install the spark plug(s) and hook up the wire(s).
2 2 Refer t o Section 4 and install the rocker arm cover.
23 Start and run the engine, then check for oil leaks and unusual
sounds coming from the rocker arm cover area.
7 -
Intake manifold removal and installation
Refer to illustrations 7.8, 7.9 and 7. 12
1
Disconnect the negative cable from the battery.
The Motor Manual Guy
2
Chapter Part A Four-cylinder engine
p ers-can be
2
3
4
connected to the intake manifold.
5
out disconnecting the hoses (see Chapter 10).
6
matic transmission (see Chapter 7).
7
8
away from the engine slightly to disengage it from the dowel pins in
the cylinder head, then lift the manifold from the engine. If the manifold
sticks to the engine after all the bolts are removed, tap it with a soft-
face hammer or a block of wood and a hammer while supporting the
manifold.
9
material (see illustration).
1 0 If the manifold is being replaced, transfer all fittings to the new one.
1 1 Position the replacement gasket on the cylinder head and install
the manifold.
12 lnstall the intake manifold bolts and tighten them (along with the
it doesn't
exhaust manifold nuts and EGR tube nut and bolts) in several stages,
following the sequence shown to the specified torque. (see illustration).
1 3 Reinstall the remaining parts in the reverse order of removal.
1 4 Run the engine and check for vacuum leaks and proper operation.
6.17 Apply a small dab of grease to the keepers before
-
installation i t will hold them i n place on the valve stem
as the spring is released
Drain the cooling system (see Chapter 1
Remove the carburetor or throttle body (see Chapter 4).
Label and then disconnect any wiring, hoses and contol cables still
Unbolt the power steering pump (if equipped), and set
Disconnect the throttle valve (TV) linkage, if equipped with an auto-
Disconnect the EGR tube fom the intake manifold (see Chapter 6).
Remove the intake manifold bolts (see illustration). Pull the manifold
Thoroughly clean the mating surfaces, removing all traces of gasket
( I ) ,
7 . 8 Remove the bolts pull the manifold away from the
engine slightly t o disengage
then lift the manifold from the engine
aside with-
it
from the dowel pins
it