engine coolant MITSUBISHI ECLIPSE 1991 Owner's Manual

ENGINE <1.8L Engine>- Service Adjustment Procedures9-25
MANIFOLD VACUUM INSPECTION(1) Before inspection and adjustment, put the vehicle
in=following state.
l Engine coolant temperature:
85-95°C (185-205°F)
l Lights, electric, cooling fan, and accessories: OFF
lTransaxle: Neutral
(N or P for vehicles with an automa-
tic transaxle)
l Steering wheel: Neutral position
(2) Check that the idling revolution speed is normal.
(3) Remove the PCV hose from the PCV valve and attach a
vacuum gauge.
(4) Check that the negative pressure at the intake manifold
during idle revolution is normal.
Standard value: 510 mmHg (20
in.Hg)(5) If outside the standard value, isolate the cause by referring
to the following table and repair the fault.
SymptomCauseRemedy
l The vacuum gauge reading is less thanl Ignition timing is retarded.l Adjust the ignition timing.
standard value, but the pointer is
-stable.
l The vacuum gauge pointer swingsl Air mixture concentration too
slowly.rich.
l Check ECI-MULTI system.l The vacuum gauge pointer drops irre-
gularly.
l The vacuum gauge pointer drops inter-
mittently to 30 to
160 mmHg (1.2 to
6.3 in.Hg).l The vacuum gauge pointer drops sud-
denly from the normal reading to 250rronnrt$,(9.8 rn.Hg), then returns tol Air mixture concentration too
lean.
l Check ECI-MULTI system.0 Incomplete close contact of in-
take exhaust valve seat.l Check and repair the valve.
l Broken cylinder head gasketl Replace cylinder head gasket.

ENGINE <1.8L Engine> - Engine Assembly9-31
ENGINE ASSEMBLY
. REMOVAL AND INSTALLATION
N69SA-APre-removal Operation
@Eliminating Fuel Pressure in Fuel Line
(Refer to GROUP 14-Service AdjustmentProcedures.)@Removal of Engine HoodeDraining of Engine Coolant
(Refer to GROUP O-Maintenance Service.)
l Removal of the Transaxle Assembly(Refer to GROUP 21 -Transaxle Assembly.)
*Removal of the Radiator
(Refer to GROUP 7-Radiator.)
Post-installation Operation
@Installation of the Radiator
(Refer to GROUP 7-Radiator.)
l Installation of the Transaxle Assembly(Refer to GROUP 21 -Transaxle Assembly.)
@Refilling of Engine Coolant
(Refer to GROUP O-Maintenance Service.)
l Installation of Engine Hood4-6 Nm
“7
/61OlA05664-6 Nm
3-4
ft.lbs.
\
16
/io1\4-6Nm164-6Nm193-4ft.lbs.
173-4ft.lbs.OlA0643Removal steps
l +1. Connection for accelerator cable or
throttle cable
2. Connection for accelerator cable
(Auto-cruise control)
3. Connection for fuel high pressure hose
4. O-ring
5. Connection for heater hoses
6. Connection for vacuum hoses
7. Connection for fuel return hose
8. Connection for brake booster vacuum
hose
9. Connection for oxygen sensor
10. Connection for engine coolant
temperature gauge unit
11. Connection for engine coolant
temperature sensor12. Connection for
ISC13. Connection for TPS
14. Connection for MPS
15. Connection for fuel injectors
16. Connection for EGR temperature sensor
17. Connection for distributor
18. Connection for CRC filter
19. Connection for ground cable
20. Control wiring harness
NOTE(1) Reverse the removal procedures to reinstall.(2) l + : Refer to “Service Points of Installation”.
(3) m : Non-reusable parts

9-36ENGINE - Cylinder Head Gasket
CYLINDER HEAD GASKET
REMOVAL AND INSTALLATION4-6 Nm
73-4 ft.lbs.
NWJA-A
Pre-removal Operationl Eliminating Fuel Pressure in Fuel
Line(Refer to GROUP
14-Service Ad-
justment Procedures.)*Draining of En
ine Coolant
(Refer to GRO9P -/-Service Adjust-ment Procedures.)
(Refer to GROUP
7-Service Adjust-~~~~~~~n
?*
29?i
8
30-46 Nm
22-29 ft.lbs.
60-80 ium43-58 ftlbs.25
iy 24 \\3-4
ftlbs./2227 26
Removal steps
1. Air intake hose
2. Connection for breather hose
I)43. Connection for accelerator cable or
throttle cable
4. Connection for accelerator cable
(Auto-cruise control)
l +5. Connection for fuel high pressure hose
6. O-ring
+e W7. Connection for radiator upper hose
8. Connection for water hose
9. Connection for water by-pass hose
10. Connection for heater hose
11. Connection for vacuum hose
12. Connection for PCV hose
13. Connection for spark plug cable
14. Connection for fuel return hose
15. Connection for brake booster vacuum
hose
16. Connection for oxygen sensor
1\4-6 Nm
3-4 ftlbs.
OlAO556
QlAO64417. Connection for engine coolant
temperature gauge unit
18. Connection for engine coolant
temperature sensor
19. Connection for
ISC20. Connection for TPS
21. Connection for MPS
22. Connection for distributor
23. Connection for injector
24. Connection for EGR temperature sensor
(California vehicles only)
25. Connection for CRC filter
26. Connection for ground cable
27. Control wiring harness
28. Clamp for pressure hose (Power steering)
29. Engine mounting bracket
NOTE
(I) Reverse the removal procedures to reinstall.(2) Ce : Refer to “Service Points of Removal”.(3) ++ : Refer to “Service Points of Installation”.(4) m : Non-reusable parts

ENGlNE <1.8L Engine> - Cylinder Head Gasket9-3937. REMOVAL OF CYLINDER HEAD ASSEMBLY
(1) Using the special tool, remove cylinder head bolts in
sequence shown in figure.
(2) Remove the cylinder head assembly.
TW-1 OBIntake sideFront of engine
r,Exhaust side
01R0390identification
I
mark
6EN025
Olm415SERVICE POINTS OF INSTALLATION
NO9JDDHs38. INSTALLATION OF CYLINDER HEAD GASKET
(1) Use a scraper to remove the cylinder head gasket from
the cylinder block.
CautionTake care that no foreign material gets into the
cylinder, or into coolant or oil passages.
(2) Clean the cylinder block and head surfaces that are in
contact with the gasket.
(3) Lay the cylinder head gasket on cylider block with the
identification mark at front top.
CautionDo not apply sealant to cylinder head gasket.
37. INSTALLATION OF CYLINDER HEAD ASSEMBLY
(1) Use a scraper to remove the cylinder head gasket from
the cylinder head assembly.
CautionTake care that no foreign material gets into the
coolant or oil passages.

ENGINE - Cylinder Head and Valve9-55
3EN026
w -w===j=Margin , EN034
Squareness
IFree length
INSPECTION
CYLINDER HEADNosocAMl Check the cylinder head for cracks, damage and engine
coolant leakage.l
Remove the scale, sealing compound and carbon deposits
completely. After cleaning oil passages, apply compressedair to make certain that the passages are clear.
l Check the cylinder head gasket surface for flatness by
using a straight edge in the direction of A, B, . . . as shown. Ifthe flatness exceeds the limit in any direction, either
resurface or replace the cylinder head.
Flatness of cylinder head gasket surface:
Standard dimension
Limit
Overall height:
Limit
Caution
Less than 0.05 mm (0020 in.)
0.2 mm (008 in.)
88.5 mm (3.484 in.)
88.3 mm (3.478 in.)
If cylinder block gasket surface has already been
ground, thickness of the removed stock should be
included in the grinding limit of -0.2 mm
(-,008 in.).
VALVESNo9PGMa
(1) Check each valve for wear, damage and deformation of
head and stem at
B. Correct or replace excessively worn,
damaged or deformed valves.
(2) If stem tip A is pitted, correct with an oil stone or other
means. The correction must be limited to a minimum. Also
reface the valve.
(3) Replace the valve if the margin has decreased to less than
the limit.
Margin:
Standard dimension
Intake1.0 mm (.039 in.)
Exhaust0.7 mm (028 in.)
Limit
Intake0.7 mm (.028 in.)
Exhaust0.5 mm LO20 in.)
VALVE SPRINGSNOWGh
(1) Check the valve spring for free length and load. If they
exceed the limits, replace the spring.
(2) Using a square, check the squareness of each spring. If thespring is out of square beyond the limit, replace.
Valve spring:
Standard dimension
Free length
49.2 mm (1.937 in.)
Load274.6 N (62 Ibs.) at installed height
Installed height37.3 mm (1.469 in.)
Out of square
Less than 2”
Limit
Free length48.2 mm (1.888 in.)
Installed height38.3 mm (1.516 in.)
Out of square4”