1991 MITSUBISHI ECLIPSE Service Manual

COOLING - Service Adjustment Procedures100N
(22 Ibs.)
DeflecAlternator
ypulley
:tion
6COOOO9
Spindle ,
HookOlLO149
IncorrectCorrectIncorrect
6COO37-(4) Move the alternator to adjust so that the amount of
deflection is the standard value.Standard
value:
New belt6.5-8.0 mm (.256-.315 in.)
Used belt9.5 mm (.374 in.)(5) On using tension gauge, move the alternator to adjust
deflection to standard value.Standard
value:
New belt600flOO N (132+22 Ibs.)
Used belt400 N (88 Ibs.)(6) After completion of adjustment, tighten alternator brace
bolt and alternator brace bolt nut to the specified torque.
(7) If new belt has been installed, run engine for more than 5
minutes.Then follow “V-RIBBED BELT DEFLECTION CHECK”
procedure to make sure that the belt has proper deflection.
<2.0L DOHC Engine>
(1) Loosen the alternator pivot nut.
(2) Loosen the belt tension adjuster lock bolt.
(3) Release tension by rotating the adjuster bolt counterclock-
wise.(4) Remove and install the alternator and water pump drive
belt.(5) Make sure the V-ribbed type drive belt is properly installed
in pulley grooves.

COOLING - Service Adjustment Procedures7-m
1(6) Adjust belt deflection by tightening adjust bolt.
:Turn adjuster bolt clockwise to increase the belt tension
and turn adjuster bolt counterclockwise to decrease the
belt tension.
Standard value:
New belt7.5-9.0 mm (.295-.354 in.)
Used belt10.0 mm (.394 in.)(7) On using tension gauge, move the alternator to adjust
deflection to standard value.
Standard value:
New belt600+100 N (132f22 Ibs.)
Used belt
400 N (88 Ibs.)(8) Tighten in order, first, adjuster lock bolt then alternator
pivot nut to the specified torque.
(9) If new belt has been installed, run engine for more than 5
minutes. Then follow “DRIVE BELT TENSION INSPEC-
TION” procedure to make sure that the belt has proper
tension and readjust if necessary.

7-12COOLING - Radiator
RADIATORPre-removal Operation
@Draining of the Engine Coolant(Refer to GROUP O-Maintenance(Refer to GROUP II-Air Cleaner.)
Service.)
I I
@Removal of Air Cleaner BracketORefilling of the Engine Coolant(Refer to GROUP 11 -Air Cleaner.)(Refer to GROUP O-MaintenanceService.)*Checking Automatic Transaxle FluidLevel and Refilling If Necessary
9-14 Nm
_
4-6 Nm3-4 ft.lbs.Removal steps
1 Drain plug2. Cap3. Overflow tube.
4-9 Nm3-4 ft.lbs.
4. Water level switch connector
5. Reserve tank~~ l +6. Radiator upper hose
+e e+ 7. Radiator lower hose
*I)8. Automatic transaxle oil cooler hoses9. Therm0 sensor connectorIO. Radiator fan motor connector
11. Condenser fan motor connector12. Upper insulator
04AOOS7
07A0049
13. Radiator assembly14. Condenser fan motor assembly15. Radiator fan motor assembly
16. Thermosensor
17. Lower insulator
NOTE(1) Reverse the removal procedures to reinstall.(2) +e : Refer to “Service Points of Removal”.(3) l + : Refer to “Service Points of Installation”

COOLING- Radiator7-13Mating
marks
04A0020
SERVICE POINTS OF REMOVALN07QBAH
6. REMOVAL OF RADIATOR UPPER HOSE/7. RADIATOR
LOWER HOSEAfter making mating marks on the radiator hose and the
hose clamp, disconnect the radiator hose.
8. DISCONNECTION OF AUTOMATIC TRANSAXLE OIL
COOLER HOSESUse a plug or otherwise cover the hose and nipple part of
the radiator so that dust, dirt, foreign materials, etc. do not
enter after the hose has been disconnected from the
radiator.
INSPECTIONNo7OcAMl Check for foreign material between radiator fins.
l Check the radiator fins for bent, or damage.
l Check the radiator for corrosion, damage rust or scale.
lCheck the radiator hoses for cracks, damage or deteriora-
tion.l Check the reserve tank for damage.
lCheck the automatic transaxle oil cooler hoses for cracking,damage or deterioration.
RADIATOR FAN MOTOR INSPECTION(1) Check to be sure that the radiator fan rotates when batten/
voltage is applied between terminals (as shown in the
figure).
(2) Check to see that abnormal noises are not produced, whilemotor is turning.
THERM0 SENSOR INSPECTIONCheck for continuity with the therm0 sensor in hot water.
NOTEImmerse therm0 sensor in hot water up to mounting thread to
check for continuity.

7-14COOLING - Radiator
A
OFF
ON
h
--- ,
BWatertemperature
16v1100
Standard value:Continuity
at 82-88X (180-190°F). . . . . . . . . . .at A pointNo continuity at
78°C (172°F) or less . . . . . . . . at 6 point.r;;;
RADIATOR FAN MOTOR RELAY INSPECTION
(1) Remove radiator fan motor relay from the relay box locatedat the right side in the engine compartment.
16LO312
1Mating marks(2) Check for continuity between the terminals when the
battery power-supply is applied to terminal 0, and terminal
@ is grounded.
When currentBetween
flowsterminals l-3Continuity
When no
current flowsSERVICE POINTS OF
JNSTALLATIONNOMDAF
7. INSTALLATION OF RADIATOR LOWER HOSE/
6. RADIATOR UPPER HOSEAlign the mating marks on the radiator hose and hose
clamp and then connect them; then, applying force in the
direction indicated by the arrow in the illustration, seat the
~
1clamp to the trace marks of the previous connection.Caution
Be sure to install the hose clamps at the trace marks ofthe
previous connection.

COOLING - Radiator Fan Motor AssemblvIThermostat7-15
RADIATOR FAN MOTOR ASSEMBLYDISASSEMBLY AND REASSEMBLY
04AOO92
NOTTA-
Disassembly steps
1. Fan2. Radiator fan motor
3. Shroud
NOTEReverse the disassembly procedures to reassemble.
THERMOSTATREMOVAL AND INSTALLATION
N07G6-
< 1.8LDOHC
P17-20 Nm
12-14 ft.lbs.
112-14 ftlbs. 1
44Removal steps
m5al51. Cap+e l 42. Connection for radiator upper hose
663. Connection for overflow tube
;. ra;t;er;utlet fitting
l + 6: Thermostat
NOTE
2(I) Reverse the removal procedures to reinstall.(2) ~~ : Refer to “Service Points of Removal”.(3) l 4 : Refer to “Service Points of Installation”.
04Aoo91(4) 19 : Non-reusable parts
Mating marks
Radiator hose
04A009ESERVICE POINTS OF REMOVAL
NO7GCFU
2. DISCONNECTION OF RADIATOR UPPER HOSEAfter making mating marks on the radiator hose and the
hose clamp, disconnect the radiator hose.

7-16COOLING - Thermostat
INSPECTIONy+w
l Check that valve closes tightly at room temperature.
l Check for defects or damage.
l Check for rust or encrustation on valve. Remove if any.
l Immerse thermostat in container of water. Stir to raise
water temperature and check that thermostat opening
valve temperature and the temperature with valve fully
open [valve lift-over 8 mm
(.31 in.)] are at the standard
value.Standard
value:Opening
valve temperature
Full-open temperature
88°C ( 190°F)
100°C (212°F)
Fullyclosedpositionve lift
04UOO18<1.8L Engine><2.0L DOHCEngine:
IMating
marks
NOTEMeasure valve height when fully closed. Calculate lift by
measuring the height when fully open.
SERVICE POINTS OF INSTALLATIONNOlGEAG
6. INSTALLATION OF THERMOSTAT
Install the thermostat so that the flange fits perfectly to the
recessed seat of the thermostat or thermostat housing.
2.CONNECTION OF RADIATOR UPPER HOSEAlign the mating marks on the radiator hose and hose
clamp and then connect them; then, applying force in the
direction indicated by the arrow in the illustration, seat the
clamp to the trace marks of the previous connection.
Caution
Be sure to install the hose clamps at the trace marks ofthe
previous connection.
04A0099 )