1991 MITSUBISHI ECLIPSE oil

9-120ENGINE <2.0L DOHC Engine>- Front Case, Oil Pump and Silent Shaft
7LUOoo6
Fine
7LUOOO76LUO12OIL PRESSURE SWITCH
-1
(1) Connect a tester (ohm range) between the terminal and thebody and check for conductivity. If there is no conductivity,
replace the switch.
(2) Next insert a very fine wedge through the oil hole, pushing
it slightly. There should be no conductivity (resistance
should be infinite). If there is conductivity even when
wedge is pushed, replace the switch.
(3) Or, if there is no conductivity when a 50
kPa (71 psi)
pressure is placed through the oil hole, the switch is
operating properly. Check at this time to see that there is
no air pressure leakage. If there is air pressure leakage, thediaphragm is broken, and the switch should be replaced.
OIL COOLER BYPASS VALVE (Turbo)
NaacNA
(1) Make sure that the valve moves smoothly.
(2) Ensure that the dimension
L measures the standard value
under normal temperature and humidity.
Dimension
L: 34.5 mm (1.358 in.)
(3) The dimension must be the standard value when measuredafter the valve has been dipped in
100°C (212°F) oil.
Dimension
L: 40 mm (1.57 in.) or more
OIL PUMP
NOBRCGG(1) Assemble the oil pump gear to the front case and rotate it
to ensure smooth rotation with no looseness.
(2) Ensure that there is no ridge wear on the contact surface
between the front case and the gear surface of the oil
pump cover.
(3) With the drive and driven gears installed into the front case.Standard value:
Drive gear
0.16-0.21 mm (.0063-.0083 in.)
Driven gear
0.13-0.18 mm (.0051-.0071 in.)
Limit:
Drive gear0.25 mm
(.0098 in.)
Driven gear0.25 mm
(4098 in.)
k

ENGINE <2.0L DOHC Engine>- Front Case, Oil Pump and Silent Shaft9-121
II6LUOO13~DEN662
Engine oil
bOil jet
Check valve assembly
DLU015(4) Check the side clearance.
Standard value:
Drive gear
0.08-0.14 mm (.0031-.0055 in.)
Driven gear
0.06-0.12 mm (.0024-.0047 in.)Limit:
Drive gear0.25 mm
(.0098 in.)
Driven gear0.25 mm
(.0098 in.)
SILENT SHAFT
NOBRUE(1) Check oil holes for clogging.
(2) Check journal for seizure, damage, and contact with
bearing. If there is anything wrong with the journal, replacesilent shaft, bearing or front case assembly.
(3) Check the silent shaft oil clearance. If the clearance is
excessively due to wear, replace the silent shaft bearing,
silent shaft or front case assembly.
Standard value:
Front
Right
0.020-0.061 mm (.0008-.0024 in.)
Left0.050-0.091 mm (.0002-.0036 in.)
RearRight
0.020-0.054 mm (.0008-.0021 in.)
Left0.042-0.083 mm (.0017-.0033 in.)
OIL JET, CHECK VALVE
NOSRCOA(1) Check the oil jet and check valve for clogging.
(2) Check the oil jet for damage and deformation.

9-122ENGINE <2.0L DOHC Engine>- Front Case, Oil Pump and Silent ShaftMain gallery
Check valve6LUO14Left
rearbearing
6EN323
SERVICE POINTS OF REASSEMBLYNOSRHAG36. INSTALLATION OF OIL JET
;;;itWhen installing the oil jet, make sure that the nozzle is in
_correct direction, that is, toward the piston.
33. INSTALLATION OF LEFT SILENT SHAFT REAR BEAR-
ING
(1) Install the special (GUIDE PLATE) tool to the cylinder
block.k
(2) Apply engine oil to the rear bearing outer circumference1and bearing hole in cylinder block.
(3) Using the special tool, install the rear bearing.
NOTEThe left rear bearing has no oil holes.

-
ENGINE <2.0L DOHC Engine>- Front Case, Oil Pump and Silent Shaft
6EN388
6EN390
6EN388
block6EN391
Oil
6FN074
32. INSTALLATION OF RIGHT SILENT SHAFT REAR BEAR-ING
(1) Apply engine oil to outer surface of bearing.
(2) Using special tools, install right rear bearing. Make sure
that oil hole of bearing is aligned with oil hole of cylinder
block.31. INSTALLATION OF SILENT SHAFT FRONT BEARINGS
(1) Using special tools, install front bearing.
(2) Make sure that oil hole of bearing is aligned with oil holeof cylinder block.

9-124ENGINE <2.0L DOHC Engine> -Front Case, Oil Pump and Silent ShaftOil hole
6EN075 1
6EN331j(3) Furthermore, make sure that clinch of bearing is in
upper most position.
28. INSTALLATION OF DRIVE
GEAR/27. DRIVEN GEAR
Coat the gear with plenty of engine oil, and align the two
timing marks.
25. INSTALLATION OF CRANKSHAFT FRONT OIL SEAL
Using the special tool, install the crankshaft front oil seal
into front case.
24./23. INSTALLATION OF OIL SEAL
Using a socket wrench, press-in the oil seal into front case.21. INSTALLATION OF FRONT CASE
(1) Set the special tool on the front end of the crankshaft
and apply a thin coat of engine oil to the outer
circumference of the special tool to install the front
case.

ENGINE <2.0L DOHC Engine> -Front Case, Oil Pump and Silent Shaft9-1256E
N026:(2) Install the front case assembly through a new front
case gasket and temporarily tighten the flange bolts
(other than those for tightening the filter bracket).
(3) Mount the oil filter bracket with oil filter bracket gasket.
Then, install the four bolts with washers.
(4) Tighten the bolts to specification.
NOTE
Bolts indicated by the * symbol should be tightened at atorque of 27-34 Nm
(20-25 ft.1b.s.).20. INSTALLATION OF DRIVEN GEAR BOLT
(1) Insert a Phillips screwdriver into a hole in the left side ofthe cylinder block to lock the silent shaft.
(2) Secure the oil pump driven gear onto the left silent
shaft by tightening the driven gear bolt to specified
torque.18. INSTALLATION OF PLUG CAP
(1) Install a new O-ring to the groove of front case.
(2) Using the special tool, install the plug cap and tighten tospecified torque.

9-126ENGINE <2.0L DOHC Engine>- Front Case, Oil Pump and Silent Shaft
6EN0213
w Crank pulley side
Oil pan
from lower side
‘- Apply sealant7LUOOO0
6LUOO49 tBracket side
-----Be
\Apply oil9. INSTALLATION OF OIL PAN
(1) Clean both mating surfaces of oil pan and cylinder
+
block.
(2) Apply a 4 mm (.I 6 in.) wide bead of sealant to the entirecircumference of the oil pan flange.
Specified sealant:
MITSUBISHI GENUINE PART No.
MD9971 10 or
equivalent
(3) The oil pan should be installed in 15 minutes after the
application of sealant.
(4) Note the difference in bolt lengths at the location
shown.8. INSTALLATION OF OIL PRESSURE SWITCH
(1) Coat sealant on the thread area, and using the special
tool, install the pressure switch.
Specified sealant: MOPAR Part No.4318034
orequivalent
Caution
1. Do not let sealant ooze out of the top of the
thread area.
2. Do not overtighten the pressure switch.
(2) Install the oil pressure switch terminals.
5. INSTALLATION OF OIL COOLER
First insert the oil cooler projecting stopper in the oil filter
bracket groove and then tighten the oil cooler bolts.lu3. INSTALLATION OF OIL FILTER
Wipe clean the mounting surface on the filter bracket.
Then, apply a thin coat of engine oil to filter O-ring and
tighten the oil filter by hand.
Caution
-.Never use a wrench to tighten the oil filter.
-i
16LUO26

ENGINE <2.0L DOHC Engine> - Piston and Connecting Rod
PISTON AND CONNECTINGRODNonlE-8
cIISASSEMBLY AND REASSEMBLY
6
disassembly steps1. Nut
+e l +2. Connecting rod cap
3. Connecting rod bearing
e+ 4. Piston and connecting rod assembly5. Connecting rod bearing
6. Bolt+e ~~ 7. Piston ring No. 1+e ++ 8. Piston ring No.2
l * 9. Oil ring10. Piston pin11. Piston12. Connecting rod
f86 50-53 Nm36-36 ftlbs.6EN0216
NOTE(1) Reverse the disassembly procedures to reassemble(2) l e : Refer to “Service Points of Disassembly”.(3) +4 : Refer to “Service Points of Reassembly”.