Jeep cherokee 1989, Owner'S Manual

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Chapter 2 Part B V6 engine
1
Using a straightedge, check for distortion at the
corners (arrows)
1 9 8 5 and 1986 models
1 1 Inspect the oil pan cradle corners for deformation using a straight-
edge across the cradle opening (see illustration).
1 2 Replace the oil pan with part no. 895301 1840 (or equivalent) if
any deformations are found during inspection.
1 3 These models have stand-offs (see illustration) on the oil pan side
rails for use with RTV sealant. To use a gasket with these pans, the
raised stand-offs must be filed or ground off.
1 4 Using oil pan gasket kit no. 8983500853 (or equivalent), place
the cradle seal into the groove in the rear main bearing cap. Apply a
small amount of RTV sealant to the corners of the seal where it contacts
the block.
15 Using gasket sealing compound. position the oil pan gasket on the
oil pan side rails.
All models
16 Carefully position the pan against the block and install the bolts
finger tight. Tighten the bolts in three steps t o the specified torque.
Note that there are t w o bolt sizes which require different torques. Start
at the center of the pan and work out toward the ends in a spiral pattern.
1 7 The remaining steps are the reverse of removal. Caution: Don't
forget to refill the engine with oil before starting i t (see Chapter
1 8 Start the engine and check carefully for oil leaks at the oil pan.
18 Oil pump
-
removal and installation
Refer to illustration 18.2
1 Remove the oil pan (refer t o Section 17).
2 Remove the pump-to-rear main bearing cap bolt (see illustration)
and separate the pump and extension shaft from the engine.
3
To install the pump, move it into position and align the top end
of the hexagonal extension shaft with the hexagonal socket in the lower
end of the distributor drive gear. The distributor drives the oil pump,
so it is essential that this alignment is correct.
4
Install the oil pump-to-rear main bearing cap bolt and tighten it t o
the specified torque.
5 Reinstall the oil pan.
19 -
removal and installation
Refer t o Chapter 2, Part A, Section 2 0 for this procedure. Be sure
t o use the torque specifications in this Part of Chapter 2 for the V6
engine.
20 Rear main oil seal replacement (engine i n vehicle)
Identifying the seal type
V6 engines covered by this manual may be equipped with four types
of rear main oil seals. To avoid unnecessary work, it is important t o
determine which type of seal your vehicle has before attempting
replacement.
17.13 The raised stand-offs (arrows) must be filed or
ground off before a gasket can be used
18.2 Remove the oil pump-to-rear main bearing cap bolt
Most 1984 models have two-piece neoprene or rope-type seals. You
may service these seals without removing the crankshaft. Some 1 9 8 4
models have been updated with a new design one-piece neoprene seal
which fits in the same groove as the old type seal it replaces. This type
is less prone to leaking, but the crankshaft must be removed t o replace
it.
To determine which type seal you have on 1 9 8 4 models, remove
the oil pan and rear main bearing cap. If you have a two-piece oil seal
(the lower portion comes off with the cap), follow the procedure out-
lined here. If you have an updated one-piece seal, the engine and crank-
shaft must be removed. Follow the procedures outlined in Section
23
of Part D of this Chapter.
On 1985 and later models, check for an oval cast on the left rear
surface of the engine block next t o the transmission bellhousing. This
signifies the engine has a one-piece seal which may be accessed by
removing the
1984 models with rope-type seals
Refer to illustrations 20.3 and 20.7
Note: Special tools, as noted in the Steps which follow, are required
for this procedure. They are available from your dealer or may in some
cases be rented from an auto parts store or tool rental shop.
1 Although the crankshaft must be removed t o install a new
the upper portion of the seal can be repaired with the crankshaft in place.
2 Remove the oil pan and oil pump (Sections 17 and 181.
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